Non-wetting surface-driven high-aspect-ratio crystalline grain growth for efficient hybrid perovskite solar cells

Bi, Cheng; Wang, Qi; Shao, Yuchuan; Yuan, Yongbo; Xiao, Zhengguo; Huang, Jinsong

doi:10.1038/ncomms8747

Non-wetting surface-driven high-aspect-ratio crystalline grain growth for efficient hybrid perovskite solar cells

Journal Article · Mon Jul 20 00:00:00 EDT 2015 · Nature Communications

DOI:https://doi.org/10.1038/ncomms8747· OSTI ID:1238043

Bi, Cheng ^[1]; Wang, Qi ^[2]; Shao, Yuchuan ^[2]; Yuan, Yongbo ^[2]; Xiao, Zhengguo ^[2]; Huang, Jinsong ^[2]

Univ. of Nebraska, Lincoln, NE (United States); University of Nebraska, Lincoln
Univ. of Nebraska, Lincoln, NE (United States)

Large-aspect-ratio grains are needed in polycrystalline thin-film solar cells for reduced charge recombination at grain boundaries; however, the grain size in organolead trihalide perovskite (OTP) films is generally limited by the film thickness. Here we report the growth of OTP grains with high average aspect ratio of 2.3–7.9 on a wide range of non-wetting hole transport layers (HTLs), which increase nucleus spacing by suppressing heterogeneous nucleation and facilitate grain boundary migration in grain growth by imposing less drag force. The reduced grain boundary area and improved crystallinity dramatically reduce the charge recombination in OTP thin films to the level in OTP single crystals. Combining the high work function of several HTLs, a high stabilized device efficiency of 18.3% in low-temperature-processed planar-heterojunction OTP devices under 1 sun illumination is achieved. As a result, this simple method in enhancing OTP morphology paves the way for its application in other optoelectronic devices for enhanced performance.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of Nebraska, Lincoln, NE (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: EE0006709

OSTI ID:: 1238043

Journal Information:: Nature Communications, Journal Name: Nature Communications Journal Issue: 2 Vol. 6; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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High-Performance Single-Crystalline Perovskite Thin-Film Photodetector Yang, Zhenqian; Deng, Yuhao; Zhang, Xiaowei Advanced Materials, Vol. 30, Issue 8 https://doi.org/10.1002/adma.201704333	journal	January 2018
Stable High-Performance Perovskite Solar Cells via Grain Boundary Passivation Niu, Tianqi; Lu, Jing; Munir, Rahim Advanced Materials, Vol. 30, Issue 16 https://doi.org/10.1002/adma.201706576	journal	March 2018
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Merits and Challenges of Ruddlesden-Popper Soft Halide Perovskites in Electro-Optics and Optoelectronics Chen, Zhizhong; Guo, Yuwei; Wertz, Esther Advanced Materials, Vol. 31, Issue 1 https://doi.org/10.1002/adma.201803514	journal	October 2018
MXene‐Derived Ferroelectric Crystals Tu, Shaobo; Ming, Fangwang; Zhang, Junwei Advanced Materials, Vol. 31, Issue 14 https://doi.org/10.1002/adma.201806860	journal	February 2019
In Situ Back‐Contact Passivation Improves Photovoltage and Fill Factor in Perovskite Solar Cells Tan, Furui; Tan, Hairen; Saidaminov, Makhsud I. Advanced Materials, Vol. 31, Issue 14 https://doi.org/10.1002/adma.201807435	journal	February 2019
Solution‐Phase Epitaxial Growth of Perovskite Films on 2D Material Flakes for High‐Performance Solar Cells Tang, Guanqi; You, Peng; Tai, Qidong Advanced Materials https://doi.org/10.1002/adma.201807689	journal	April 2019
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Dual Interfacial Design for Efficient CsPbI ₂ Br Perovskite Solar Cells with Improved Photostability Tian, Jingjing; Xue, Qifan; Tang, Xiaofeng Advanced Materials, Vol. 31, Issue 23 https://doi.org/10.1002/adma.201901152	journal	March 2019
Dopant‐Free Small‐Molecule Hole‐Transporting Material for Inverted Perovskite Solar Cells with Efficiency Exceeding 21% Wang, Yang; Chen, Wei; Wang, Lei Advanced Materials, Vol. 31, Issue 35 https://doi.org/10.1002/adma.201902781	journal	July 2019
Modulate Molecular Interaction between Hole Extraction Polymers and Lead Ions toward Hysteresis-Free and Efficient Perovskite Solar Cells Zhang, Zhongqiang; Fu, Weifei; Ding, Honghe Advanced Materials Interfaces, Vol. 5, Issue 15 https://doi.org/10.1002/admi.201800090	journal	June 2018
Atomic Layer Deposited TiO ₂ -IrO _x Alloy as a Hole Transport Material for Perovskite Solar Cells Tan, Wanliang; Hendricks, Olivia L.; Meng, Andrew C. Advanced Materials Interfaces, Vol. 5, Issue 16 https://doi.org/10.1002/admi.201800191	journal	July 2018
Triarylphosphine Oxide as Cathode Interfacial Material for Inverted Perovskite Solar Cells Wang, Kai; Neophytou, Marios; Aydin, Erkan Advanced Materials Interfaces, Vol. 6, Issue 12 https://doi.org/10.1002/admi.201900434	journal	April 2019
From Bulk to Surface: Sodium Treatment Reduces Recombination at the Nickel Oxide/Perovskite Interface Di Girolamo, Diego; Phung, Nga; Jošt, Marko Advanced Materials Interfaces, Vol. 6, Issue 17 https://doi.org/10.1002/admi.201900789	journal	July 2019
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Stable, High‐Sensitivity and Fast‐Response Photodetectors Based on Lead‐Free Cs ₂ AgBiBr ₆ Double Perovskite Films Yang, Jie; Bao, Chunxiong; Ning, Weihua Advanced Optical Materials https://doi.org/10.1002/adom.201801732	journal	May 2019
Engineering of the Back Contact between PCBM and Metal Electrode for Planar Perovskite Solar Cells with Enhanced Efficiency and Stability Xiong, Shaobing; Yuan, Meng; Yang, Jianming Advanced Optical Materials, Vol. 7, Issue 19 https://doi.org/10.1002/adom.201900542	journal	June 2019
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Efficiency Enhancement with the Ferroelectric Coupling Effect Using P(VDF‐TrFE) in CH ₃ NH ₃ PbI ₃ Solar Cells Jia, Endong; Wei, Dong; Cui, Peng Advanced Science, Vol. 6, Issue 16 https://doi.org/10.1002/advs.201900252	journal	June 2019
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Light-Induced Self-Poling Effect on Organometal Trihalide Perovskite Solar Cells for Increased Device Efficiency and Stability Deng, Yehao; Xiao, Zhengguo; Huang, Jinsong Advanced Energy Materials, Vol. 5, Issue 20 https://doi.org/10.1002/aenm.201500721	journal	August 2015
Improving Film Formation and Photovoltage of Highly Efficient Inverted-Type Perovskite Solar Cells through the Incorporation of New Polymeric Hole Selective Layers Xue, Qifan; Chen, Guiting; Liu, Meiyue Advanced Energy Materials, Vol. 6, Issue 5 https://doi.org/10.1002/aenm.201502021	journal	December 2015
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Copper Salts Doped Spiro-OMeTAD for High-Performance Perovskite Solar Cells Li, Meng; Wang, Zhao-Kui; Yang, Ying-Guo Advanced Energy Materials, Vol. 6, Issue 21 https://doi.org/10.1002/aenm.201601156	journal	August 2016
Dual Interfacial Modifications Enable High Performance Semitransparent Perovskite Solar Cells with Large Open Circuit Voltage and Fill Factor Xue, Qifan; Bai, Yang; Liu, Meiyue Advanced Energy Materials, Vol. 7, Issue 9 https://doi.org/10.1002/aenm.201602333	journal	December 2016
Progress in Tandem Solar Cells Based on Hybrid Organic-Inorganic Perovskites Chen, Bo; Zheng, Xiaopeng; Bai, Yang Advanced Energy Materials, Vol. 7, Issue 14 https://doi.org/10.1002/aenm.201602400	journal	March 2017
Molecular Engineered Hole-Extraction Materials to Enable Dopant-Free, Efficient p-i-n Perovskite Solar Cells Chen, Huanle; Fu, Weifei; Huang, Chuyi Advanced Energy Materials, Vol. 7, Issue 18 https://doi.org/10.1002/aenm.201700012	journal	May 2017
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Efficient and Hysteresis-Free Perovskite Solar Cells Based on a Solution Processable Polar Fullerene Electron Transport Layer Wang, Ying-Chiao; Li, Xiaodong; Zhu, Liping Advanced Energy Materials, Vol. 7, Issue 21 https://doi.org/10.1002/aenm.201701144	journal	August 2017
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Applications of Phosphorene and Black Phosphorus in Energy Conversion and Storage Devices Pang, Jinbo; Bachmatiuk, Alicja; Yin, Yin Advanced Energy Materials, Vol. 8, Issue 8 https://doi.org/10.1002/aenm.201702093	journal	December 2017
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Low-Temperature Solution-Processed CuCrO ₂ Hole-Transporting Layer for Efficient and Photostable Perovskite Solar Cells Zhang, Hua; Wang, Huan; Zhu, Hongmei Advanced Energy Materials, Vol. 8, Issue 13 https://doi.org/10.1002/aenm.201702762	journal	January 2018
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New Strategy for Two-Step Sequential Deposition: Incorporation of Hydrophilic Fullerene in Second Precursor for High-Performance p-i-n Planar Perovskite Solar Cells Xu, Guiying; Xue, Rongming; Chen, Weijie Advanced Energy Materials, Vol. 8, Issue 12 https://doi.org/10.1002/aenm.201703054	journal	January 2018
Fused-Ring Electron Acceptor ITIC-Th: A Novel Stabilizer for Halide Perovskite Precursor Solution Qin, Minchao; Cao, Jie; Zhang, Tiankai Advanced Energy Materials, Vol. 8, Issue 18 https://doi.org/10.1002/aenm.201703399	journal	March 2018
Understanding the Doping Effect on NiO: Toward High-Performance Inverted Perovskite Solar Cells Chen, Wei; Wu, Yinghui; Fan, Jing Advanced Energy Materials, Vol. 8, Issue 19 https://doi.org/10.1002/aenm.201703519	journal	March 2018
High-Performance Thickness Insensitive Perovskite Solar Cells with Enhanced Moisture Stability Chen, Jiehuan; Zuo, Lijian; Zhang, Yingzhu Advanced Energy Materials, Vol. 8, Issue 23 https://doi.org/10.1002/aenm.201800438	journal	June 2018
Sequentially Fluorinated PTAA Polymers for Enhancing V _OC of High-Performance Perovskite Solar Cells Kim, Youngwoong; Jung, Eui Hyuk; Kim, Geunjin Advanced Energy Materials, Vol. 8, Issue 29 https://doi.org/10.1002/aenm.201801668	journal	September 2018
The Role of Charge Selective Contacts in Perovskite Solar Cell Stability Roose, Bart; Wang, Qiong; Abate, Antonio Advanced Energy Materials https://doi.org/10.1002/aenm.201803140	journal	December 2018
Simple, Robust, and Going More Efficient: Recent Advance on Electron Transport Layer‐Free Perovskite Solar Cells Huang, Like; Ge, Ziyi Advanced Energy Materials, Vol. 9, Issue 24 https://doi.org/10.1002/aenm.201900248	journal	May 2019
Enhancing the Open‐Circuit Voltage of Perovskite Solar Cells by up to 120 mV Using π‐Extended Phosphoniumfluorene Electrolytes as Hole Blocking Layers An, Qingzhi; Sun, Qing; Weu, Andreas Advanced Energy Materials, Vol. 9, Issue 33 https://doi.org/10.1002/aenm.201901257	journal	June 2019
Processing‐Performance Evolution of Perovskite Solar Cells: From Large Grain Polycrystalline Films to Single Crystals Haque, Md Azimul; Troughton, Joel; Baran, Derya Advanced Energy Materials, Vol. 10, Issue 13 https://doi.org/10.1002/aenm.201902762	journal	April 2020
New Strategies for Defect Passivation in High‐Efficiency Perovskite Solar Cells Akin, Seckin; Arora, Neha; Zakeeruddin, Shaik M. Advanced Energy Materials, Vol. 10, Issue 13 https://doi.org/10.1002/aenm.201903090	journal	April 2020
SrTiO ₃ /Al ₂ O ₃ ‐Graphene Electron Transport Layer for Highly Stable and Efficient Composites‐Based Perovskite Solar Cells with 20.6% Efficiency Mahmoudi, Tahmineh; Wang, Yousheng; Hahn, Yoon‐Bong Advanced Energy Materials, Vol. 10, Issue 2 https://doi.org/10.1002/aenm.201903369	journal	November 2019
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Efficient and Stable Inverted Planar Perovskite Solar Cells Using a Triphenylamine Hole-Transporting Material Chen, Rui; Bu, Tongle; Li, Jing ChemSusChem, Vol. 11, Issue 9 https://doi.org/10.1002/cssc.201800476	journal	April 2018
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18% High-Efficiency Air-Processed Perovskite Solar Cells Made in a Humid Atmosphere of 70% RH Cheng, Yuanhang; Xu, Xiuwen; Xie, Yuemin Solar RRL, Vol. 1, Issue 9 https://doi.org/10.1002/solr.201700097	journal	July 2017
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A Lewis Base-Assisted Passivation Strategy Towards Highly Efficient and Stable Perovskite Solar Cells Yang, Guang; Qin, Pingli; Fang, Guojia Solar RRL, Vol. 2, Issue 8 https://doi.org/10.1002/solr.201800055	journal	May 2018
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Scaling behavior of moisture-induced grain degradation in polycrystalline hybrid perovskite thin films Wang, Qi; Chen, Bo; Liu, Ye Energy & Environmental Science, Vol. 10, Issue 2 https://doi.org/10.1039/c6ee02941h	journal	January 2017
Is Cu a stable electrode material in hybrid perovskite solar cells for a 30-year lifetime? Zhao, Jingjing; Zheng, Xiaopeng; Deng, Yehao Energy & Environmental Science, Vol. 9, Issue 12 https://doi.org/10.1039/c6ee02980a	journal	January 2016
Tailoring metal halide perovskites through metal substitution: influence on photovoltaic and material properties Klug, Matthew T.; Osherov, Anna; Haghighirad, Amir A. Energy & Environmental Science, Vol. 10, Issue 1 https://doi.org/10.1039/c6ee03201j	journal	January 2017
The synergistic effect of H ₂ O and DMF towards stable and 20% efficiency inverted perovskite solar cells Chiang, Chien-Hung; Nazeeruddin, Mohammad Khaja; Grätzel, Michael Energy & Environmental Science, Vol. 10, Issue 3 https://doi.org/10.1039/c6ee03586h	journal	January 2017
p-i-n/n-i-p type planar hybrid structure of highly efficient perovskite solar cells towards improved air stability: synthetic strategies and the role of p-type hole transport layer (HTL) and n-type electron transport layer (ETL) metal oxides Mali, Sawanta S.; Hong, Chang Kook Nanoscale, Vol. 8, Issue 20 https://doi.org/10.1039/c6nr02276f	journal	January 2016
Perovskite solar cells with a DMSO-treated PEDOT:PSS hole transport layer exhibit higher photovoltaic performance and enhanced durability Huang, Di; Goh, Tenghooi; Kong, Jaemin Nanoscale, Vol. 9, Issue 12 https://doi.org/10.1039/c6nr08375g	journal	January 2017
Efficient promotion of charge separation and suppression of charge recombination by blending PCBM and its dimer as electron transport layer in inverted perovskite solar cells Han, Jun; Wang, Hao-Yi; Wang, Yi RSC Advances, Vol. 6, Issue 113 https://doi.org/10.1039/c6ra22023a	journal	January 2016
Thiocyanate assisted performance enhancement of formamidinium based planar perovskite solar cells through a single one-step solution process Yang, Shida; Liu, Wenqing; Zuo, Lijian Journal of Materials Chemistry A, Vol. 4, Issue 24 https://doi.org/10.1039/c6ta02999j	journal	January 2016
Ultrasmooth metal halide perovskite thin films via sol–gel processing Kerner, Ross A.; Zhao, Lianfeng; Xiao, Zhengguo Journal of Materials Chemistry A, Vol. 4, Issue 21 https://doi.org/10.1039/c6ta03092k	journal	January 2016
Elimination of the J–V hysteresis of planar perovskite solar cells by interfacial modification with a thermo-cleavable fullerene derivative Xu, Qian; Lu, Zhen; Zhu, Lifeng Journal of Materials Chemistry A, Vol. 4, Issue 45 https://doi.org/10.1039/c6ta06143e	journal	January 2016
Interface engineering in planar perovskite solar cells: energy level alignment, perovskite morphology control and high performance achievement Yang, Guang; Wang, Changlei; Lei, Hongwei Journal of Materials Chemistry A, Vol. 5, Issue 4 https://doi.org/10.1039/c6ta08783c	journal	January 2017
Defects in metal triiodide perovskite materials towards high-performance solar cells: origin, impact, characterization, and engineering Ran, Chenxin; Xu, Jiantie; Gao, Weiyin Chemical Society Reviews, Vol. 47, Issue 12 https://doi.org/10.1039/c7cs00868f	journal	January 2018
Toward a universal polymeric material for electrode buffer layers in organic and perovskite solar cells and organic light-emitting diodes Zhang, Qiang; Wang, Wei-Ting; Chi, Cheng-Yu Energy & Environmental Science, Vol. 11, Issue 3 https://doi.org/10.1039/c7ee03275g	journal	January 2018
Thermodynamically self-organized hole transport layers for high-efficiency inverted-planar perovskite solar cells Kim, Wanjung; Kim, Soyeon; Chai, Sung Uk Nanoscale, Vol. 9, Issue 34 https://doi.org/10.1039/c7nr03265j	journal	January 2017
Growth, characterization, and thin film transistor application of CH ₃ NH ₃ PbI ₃ perovskite on polymeric gate dielectric layers Ngai, Jenner H. L.; Ho, Johnny K. W.; Chan, Rocky K. H. RSC Adv., Vol. 7, Issue 78 https://doi.org/10.1039/c7ra08699g	journal	January 2017
Improving the photovoltaic performance of planar heterojunction perovskite solar cells by mixed solvent vapor treatment Yuan, Binbin; Zhao, Suling; Xu, Zheng RSC Advances, Vol. 8, Issue 21 https://doi.org/10.1039/c7ra13289a	journal	January 2018
Amino-functionalized conjugated polymer electron transport layers enhance the UV-photostability of planar heterojunction perovskite solar cells Li, Dan; Sun, Chen; Li, Hao Chemical Science, Vol. 8, Issue 6 https://doi.org/10.1039/c7sc00077d	journal	January 2017
ITIC surface modification to achieve synergistic electron transport layer enhancement for planar-type perovskite solar cells with efficiency exceeding 20% Jiang, Jiexuan; Jin, Zhiwen; Lei, Jie Journal of Materials Chemistry A, Vol. 5, Issue 20 https://doi.org/10.1039/c7ta01636k	journal	January 2017
Crystallization manipulation and morphology evolution for highly efficient perovskite solar cell fabrication via hydration water induced intermediate phase formation under heat assisted spin-coating Zhou, Xianyong; Zhang, Yong; Kong, Weiguang Journal of Materials Chemistry A, Vol. 6, Issue 7 https://doi.org/10.1039/c7ta08947c	journal	January 2018
High mobility, hole transport materials for highly efficient PEDOT:PSS replacement in inverted perovskite solar cells Neophytou, Marios; Griffiths, Jack; Fraser, James Journal of Materials Chemistry C, Vol. 5, Issue 20 https://doi.org/10.1039/c7tc00858a	journal	January 2017
Exploring the effects of interfacial carrier transport layers on device performance and optoelectronic properties of planar perovskite solar cells Khadka, Dhruba B.; Shirai, Yasuhiro; Yanagida, Masatoshi Journal of Materials Chemistry C, Vol. 5, Issue 34 https://doi.org/10.1039/c7tc02822a	journal	January 2017
Degradation of encapsulated perovskite solar cells driven by deep trap states and interfacial deterioration Khadka, Dhruba B.; Shirai, Yasuhiro; Yanagida, Masatoshi Journal of Materials Chemistry C, Vol. 6, Issue 1 https://doi.org/10.1039/c7tc03733c	journal	January 2018
How does alkyl chain length modify the properties of triphenylamine-based hole transport materials? Lin, Kun-Han; Prlj, Antonio; Corminboeuf, Clémence Journal of Materials Chemistry C, Vol. 6, Issue 5 https://doi.org/10.1039/c7tc05318e	journal	January 2018
Air-stable formamidinium/methylammonium mixed lead iodide perovskite integral microcrystals with low trap density and high photo-responsivity Wu, Guangbao; Zhou, Jiyu; Meng, Rui Physical Chemistry Chemical Physics, Vol. 21, Issue 6 https://doi.org/10.1039/c8cp07271j	journal	January 2019
Rapid route to efficient, scalable, and robust perovskite photovoltaics in air Hilt, Florian; Hovish, Michael Q.; Rolston, Nicholas Energy & Environmental Science, Vol. 11, Issue 8 https://doi.org/10.1039/c8ee01065j	journal	January 2018
Fullerene derivative anchored SnO ₂ for high-performance perovskite solar cells Liu, Kuan; Chen, Shuang; Wu, Jionghua Energy & Environmental Science, Vol. 11, Issue 12 https://doi.org/10.1039/c8ee02172d	journal	January 2018
High performance ambient-air-stable FAPbI ₃ perovskite solar cells with molecule-passivated Ruddlesden–Popper/3D heterostructured film Niu, Tianqi; Lu, Jing; Tang, Ming-Chun Energy & Environmental Science, Vol. 11, Issue 12 https://doi.org/10.1039/c8ee02542h	journal	January 2018
Low-cost synthesis of heterocyclic spiro-type hole transporting materials for perovskite solar cell applications Govindan, Venkatesan; Yang, Kai-Cheng; Fu, Yung-Sheng New Journal of Chemistry, Vol. 42, Issue 9 https://doi.org/10.1039/c8nj01082j	journal	January 2018
Improved power conversion efficiency of perovskite solar cells using highly conductive WO _x doped PEDOT:PSS Kanwat, Anil; Rani, V. Sandhya; Jang, Jin New Journal of Chemistry, Vol. 42, Issue 19 https://doi.org/10.1039/c8nj04131h	journal	January 2018
Structural design considerations of solution-processable graphenes as interfacial materials via a controllable synthesis method for the achievement of highly efficient, stable, and printable planar perovskite solar cells Yeo, Jun-Seok; Seo, You-Hyun; Jung, Chan-Hee Nanoscale, Vol. 11, Issue 3 https://doi.org/10.1039/c8nr05698f	journal	January 2019
Enhancement in the photovoltaic performance of planar perovskite solar cells by perovskite cluster engineering using an interfacial energy modifier Li, Bichen; Chen, Zhihui; Yao, Hongyan Nanoscale, Vol. 11, Issue 7 https://doi.org/10.1039/c8nr10125f	journal	January 2019
Improved performance and stability of perovskite solar cells with bilayer electron-transporting layers Jiang, Tingting; Fu, Weifei RSC Advances, Vol. 8, Issue 11 https://doi.org/10.1039/c8ra00248g	journal	January 2018
Enhanced performance of perovskite solar cells via anti-solvent nonfullerene Lewis base IT-4F induced trap-passivation Guo, Yaxiong; Ma, Junjie; Lei, Hongwei Journal of Materials Chemistry A, Vol. 6, Issue 14 https://doi.org/10.1039/c8ta00583d	journal	January 2018
Efficient and UV-stable perovskite solar cells enabled by side chain-engineered polymeric hole-transporting layers Tsai, Chang-Hung; Li, Nan; Lee, Chia-Chen Journal of Materials Chemistry A, Vol. 6, Issue 27 https://doi.org/10.1039/c8ta03608j	journal	January 2018
Ionic liquid modified SnO ₂ nanocrystals as a robust electron transporting layer for efficient planar perovskite solar cells Huang, Chun; Lin, Peng; Fu, Nianqing Journal of Materials Chemistry A, Vol. 6, Issue 44 https://doi.org/10.1039/c8ta04131h	journal	January 2018
Highly efficient inverted perovskite solar cells based on self-assembled graphene derivatives Yin, Xuewen; Zhou, Yu; Han, Jianhua Journal of Materials Chemistry A, Vol. 6, Issue 42 https://doi.org/10.1039/c8ta05955a	journal	January 2018
Highly efficient flexible solar cells based on a room-temperature processed inorganic perovskite Hu, Yanqiang; Zhang, Shufang; Shu, Ting Journal of Materials Chemistry A, Vol. 6, Issue 41 https://doi.org/10.1039/c8ta06719h	journal	January 2018
Incorporating deep electron traps into perovskite devices: towards high efficiency solar cells and fast photodetectors Zhang, Dezhong; Liu, Chunyu; Li, Zhiqi Journal of Materials Chemistry A, Vol. 6, Issue 42 https://doi.org/10.1039/c8ta08499h	journal	January 2018
Improving the conductivity of sol–gel derived NiO _x with a mixed oxide composite to realize over 80% fill factor in inverted planar perovskite solar cells Li, Menglin; Xu, Xiuwen; Xie, Yuemin Journal of Materials Chemistry A, Vol. 7, Issue 16 https://doi.org/10.1039/c8ta10821h	journal	January 2019
Critical roles of potassium in charge-carrier balance and diffusion induced defect passivation for efficient inverted perovskite solar cells Yin, Xuewen; Han, Jianhua; Zhou, Yu Journal of Materials Chemistry A, Vol. 7, Issue 10 https://doi.org/10.1039/c8ta11782a	journal	January 2019
Bi-functional additive engineering for high-performance perovskite solar cells with reduced trap density Yang, Yi; Peng, Huirong; Liu, Cheng Journal of Materials Chemistry A, Vol. 7, Issue 11 https://doi.org/10.1039/c8ta11925b	journal	January 2019
Crosslinked and dopant free hole transport materials for efficient and stable planar perovskite solar cells Zhang, Yun; Kou, Chun; Zhang, Junjie Journal of Materials Chemistry A, Vol. 7, Issue 10 https://doi.org/10.1039/c8ta12060a	journal	January 2019
A Cu ₃ PS ₄ nanoparticle hole selective layer for efficient inverted perovskite solar cells Yin, Xinxing; McClary, Scott A.; Song, Zhaoning Journal of Materials Chemistry A, Vol. 7, Issue 9 https://doi.org/10.1039/c8ta12100a	journal	January 2019
Low temperature and rapid formation of high quality metal oxide thin film via a hydroxide-assisted energy conservation strategy Jao, Meng-Huan; Cheng, Chien-Chen; Lu, Chun-Fu Journal of Materials Chemistry C, Vol. 6, Issue 37 https://doi.org/10.1039/c8tc03544j	journal	January 2018
Nickel phthalocyanine as an excellent hole-transport material in inverted planar perovskite solar cells Haider, Mustafa; Zhen, Chao; Wu, Tingting Chemical Communications, Vol. 55, Issue 37 https://doi.org/10.1039/c9cc01266d	journal	January 2019
Hierarchy of interfacial passivation in inverted perovskite solar cells Wang, Tun; Abbasi, Sadeq; Wang, Xin Chemical Communications, Vol. 55, Issue 99 https://doi.org/10.1039/c9cc07517h	journal	January 2019
The charge carrier dynamics, efficiency and stability of two-dimensional material-based perovskite solar cells Wang, Bing; Iocozzia, James; Zhang, Meng Chemical Society Reviews, Vol. 48, Issue 18 https://doi.org/10.1039/c9cs00254e	journal	January 2019
20.7% highly reproducible inverted planar perovskite solar cells with enhanced fill factor and eliminated hysteresis Liu, Xixia; Cheng, Yuanhang; Liu, Chao Energy & Environmental Science, Vol. 12, Issue 5 https://doi.org/10.1039/c9ee00872a	journal	January 2019
Limitations of a polymer-based hole transporting layer for application in planar inverted perovskite solar cells Petrović, Miloš; Maksudov, Temur; Panagiotopoulos, Apostolos Nanoscale Advances, Vol. 1, Issue 8 https://doi.org/10.1039/c9na00246d	journal	January 2019
Overcoming intrinsic defects of the hole transport layer with optimized carbon nanorods for perovskite solar cells Li, Zhiqi; Dong, Jiajun; Han, Wenbin Nanoscale, Vol. 11, Issue 18 https://doi.org/10.1039/c9nr01836k	journal	January 2019
Single-phase alkylammonium cesium lead iodide quasi-2D perovskites for color-tunable and spectrum-stable red LEDs Lin, Hong; Mao, Jian; Qin, Minchao Nanoscale, Vol. 11, Issue 36 https://doi.org/10.1039/c9nr02706h	journal	January 2019
Growth modes and quantum confinement in ultrathin vapour-deposited MAPbI ₃ films Parrott, Elizabeth S.; Patel, Jay B.; Haghighirad, Amir-Abbas Nanoscale, Vol. 11, Issue 30 https://doi.org/10.1039/c9nr04104d	journal	January 2019
Two-dimensional additive diethylammonium iodide promoting crystal growth for efficient and stable perovskite solar cells Huang, Xin; Cui, Qiuhong; Bi, Wentao RSC Advances, Vol. 9, Issue 14 https://doi.org/10.1039/c9ra01186b	journal	January 2019
Spacer layer design for efficient fully printable mesoscopic perovskite solar cells Liu, Tongfa; Xiong, Yuli; Mei, Anyi RSC Advances, Vol. 9, Issue 51 https://doi.org/10.1039/c9ra05357c	journal	January 2019
Enhanced efficacy of defect passivation and charge extraction for efficient perovskite photovoltaics with a small open circuit voltage loss Liao, Jin-Feng; Wu, Wu-Qiang; Zhong, Jun-Xing Journal of Materials Chemistry A, Vol. 7, Issue 15 https://doi.org/10.1039/c9ta01760g	journal	January 2019
A polyaspartic acid sodium interfacial layer enhances surface trap passivation in perovskite solar cells Wang, Boxin; Wu, Fei; Bi, Shiqing Journal of Materials Chemistry A, Vol. 7, Issue 41 https://doi.org/10.1039/c9ta01947b	journal	January 2019
Engineering the underlying surface to manipulate the growth of 2D perovskites for highly efficient solar cells Tian, Shuoxun; Chen, Jiehuan; Lian, Xiaomei Journal of Materials Chemistry A, Vol. 7, Issue 23 https://doi.org/10.1039/c9ta03022k	journal	January 2019
p-Doping of organic hole transport layers in p–i–n perovskite solar cells: correlating open-circuit voltage and photoluminescence quenching Du, Tian; Xu, Weidong; Daboczi, Matyas Journal of Materials Chemistry A, Vol. 7, Issue 32 https://doi.org/10.1039/c9ta03896e	journal	January 2019
Reduced methylammonium triple-cation Rb _0.05 (FAPbI ₃ ) _0.95 (MAPbBr ₃ ) _0.05 perovskite solar cells based on a TiO ₂ /SnO ₂ bilayer electron transport layer approaching a stabilized 21% efficiency: the role of antisolvents Mali, Sawanta S.; Patil, Jyoti V.; Arandiyan, Hamidreza Journal of Materials Chemistry A, Vol. 7, Issue 29 https://doi.org/10.1039/c9ta05422g	journal	January 2019
A review of aspects of additive engineering in perovskite solar cells Mahapatra, Apurba; Prochowicz, Daniel; Tavakoli, Mohammad Mahdi Journal of Materials Chemistry A, Vol. 8, Issue 1 https://doi.org/10.1039/c9ta07657c	journal	January 2020
Interfacial engineering of a ZnO electron transporting layer using self-assembled monolayers for high performance and stable perovskite solar cells Han, Jinyoung; Kwon, Hannah; Kim, Eunah Journal of Materials Chemistry A, Vol. 8, Issue 4 https://doi.org/10.1039/c9ta12750j	journal	January 2020
Incorporation of two electron acceptors to improve the electron mobility and stability of perovskite solar cells Tang, Xianglan; Xiao, Shuqin; Fu, Qingxia Journal of Materials Chemistry C, Vol. 7, Issue 27 https://doi.org/10.1039/c9tc02457c	journal	January 2019
Control of aggregation and dissolution of small molecule hole transport layers via a doping strategy for highly efficient perovskite solar cells Ali, Jazib; Song, Jingnan; Li, Yu Journal of Materials Chemistry C, Vol. 7, Issue 38 https://doi.org/10.1039/c9tc03120k	journal	January 2019
Methylamine-induced defect-healing and cationic substitution: a new method for low-defect perovskite thin films and solar cells Yang, Jin-an; Qin, Tianxu; Xie, Lisha Journal of Materials Chemistry C, Vol. 7, Issue 35 https://doi.org/10.1039/c9tc03490k	journal	January 2019
Sulfur-fused perylene diimide electron transport layers allow >400 h operational lifetime of methylammonium lead iodide photovoltaics Nakayama, Hidenori; Zheng, Yonghao; Schneider, Julia A. Journal of Materials Chemistry C, Vol. 7, Issue 36 https://doi.org/10.1039/c9tc03877a	journal	January 2019
The effect of hole transporting layer in charge accumulation properties of p-i-n perovskite solar cells Galatopoulos, Fedros; Savva, Achilleas; Papadas, Ioannis T. APL Materials, Vol. 5, Issue 7 https://doi.org/10.1063/1.4991030	journal	July 2017
Electronic transport of organic-inorganic hybrid perovskites from first-principles and machine learning Li, Limeng; You, Yang; Hu, Shunbo Applied Physics Letters, Vol. 114, Issue 8 https://doi.org/10.1063/1.5045512	journal	February 2019
Thin‐film solar cells exceeding 22% solar cell efficiency: An overview on CdTe-, Cu(In,Ga)Se ₂ -, and perovskite-based materials Powalla, Michael; Paetel, Stefan; Ahlswede, Erik Applied Physics Reviews, Vol. 5, Issue 4 https://doi.org/10.1063/1.5061809	journal	December 2018
Suppression of non-radiative recombination toward high efficiency perovskite light-emitting diodes Liu, Yuqiang; Wu, Tian; Liu, Yuan APL Materials, Vol. 7, Issue 2 https://doi.org/10.1063/1.5064370	journal	February 2019
Ion induced passivation of grain boundaries in perovskite solar cells Nandal, Vikas; Nair, Pradeep R. Journal of Applied Physics, Vol. 125, Issue 17 https://doi.org/10.1063/1.5082967	journal	May 2019
Mixed Halide Perovskite Solar Cells: Progress and Challenges Hamed, Mohammed S. G.; Mola, Genene Tessema Critical Reviews in Solid State and Materials Sciences, Vol. 45, Issue 2 https://doi.org/10.1080/10408436.2018.1549976	journal	February 2019
Functional graded fullerene derivatives for improving the fill factor and device stability of inverted-type perovskite solar cells Chiu, Kuo Yuan; Chang, Sheng Hsiung; Huang, Wei-Chen Nanotechnology, Vol. 29, Issue 30 https://doi.org/10.1088/1361-6528/aac293	journal	May 2018
Formation and characterization of preferred oriented perovskite thin films on single-crystalline substrates Chen, Lung-Chien; Chen, Cheng-Chiang; Chang, Sheng Hsiung Materials Research Express, Vol. 5, Issue 6 https://doi.org/10.1088/2053-1591/aac625	journal	June 2018
Towards large-area perovskite solar cells: the influence of compact and mesoporous TiO ₂ electron transport layers Ye, Wang; Xiang, Jin; Huang, Feng Materials Research Express, Vol. 5, Issue 8 https://doi.org/10.1088/2053-1591/aad311	journal	July 2018
The roles of acetylacetone additives in enhancing perovskite solar cell performance Zhuang, Xueheng; Zhang, Ying; Zhang, Jing Materials Research Express, Vol. 6, Issue 2 https://doi.org/10.1088/2053-1591/aaeeb2	journal	November 2018
Meniscus fabrication of halide perovskite thin films at high throughput for large area and low-cost solar panels Dai, Xuezeng; Deng, Yehao; Van Brackle, Charles H. International Journal of Extreme Manufacturing, Vol. 1, Issue 2 https://doi.org/10.1088/2631-7990/ab263e	journal	June 2019
Stability and Band-Gap Tuning of the Chalcogenide Perovskite BaZrS 3 in Raman and Optical Investigations at High Pressures Gross, Nelson; Sun, Yi-Yang; Perera, Samanthe Physical Review Applied, Vol. 8, Issue 4 https://doi.org/10.1103/physrevapplied.8.044014	journal	October 2017
The effect of substrate temperature on microstructural evolution and hardenability of tungsten carbide coating in hot filament chemical vapor deposition Sabzi, Masoud; Mousavi Anijdan, Seyyed Hashem; Asadian, Mohsen International Journal of Applied Ceramic Technology, Vol. 15, Issue 6 https://doi.org/10.1111/ijac.12905	journal	April 2018
Enhanced photovoltage for inverted planar heterojunction perovskite solar cells Luo, Deying; Yang, Wenqiang; Wang, Zhiping Science, Vol. 360, Issue 6396 https://doi.org/10.1126/science.aap9282	journal	June 2018
High-performance perovskite/Cu(In,Ga)Se ₂ monolithic tandem solar cells Han, Qifeng; Hsieh, Yao-Tsung; Meng, Lei Science, Vol. 361, Issue 6405 https://doi.org/10.1126/science.aat5055	journal	August 2018
Stable Perovskite Solar Cells with Improved Hydrophobicity Based on BHT Additive Jin, Lifen; Huang, Yuelong; Ma, Zhu Nano, Vol. 14, Issue 02 https://doi.org/10.1142/s179329201950022x	journal	February 2019
Molecular doping enabled scalable blading of efficient hole-transport-layer-free perovskite solar cells A., Gruverman,; Y., Shao,; Y., Liu, The University of North Carolina at Chapel Hill University Libraries https://doi.org/10.17615/236r-qz11	text	January 2018
Matching Charge Extraction Contact for Wide-Bandgap Perovskite Solar Cells B., Chen,; Y., Shao,; J., Huang, The University of North Carolina at Chapel Hill University Libraries https://doi.org/10.17615/50rf-ma51	text	January 2017
Quantification of re-Absorption and re-emission processes to determine photon recycling efficiency in perovskite single crystals Q., Dong,; H., Wei,; Y., Fang, The University of North Carolina at Chapel Hill University Libraries https://doi.org/10.17615/57bk-3140	text	January 2017
Argon Plasma Treatment to Tune Perovskite Surface Composition for High Efficiency Solar Cells and Fast Photodetectors Y., Fang,; X., Xiao,; Y., Gao, The University of North Carolina at Chapel Hill University Libraries https://doi.org/10.17615/8gyw-8442	text	January 2018
Enhancing stability and efficiency of perovskite solar cells with crosslinkable silane-functionalized and doped fullerene D., Wang,; W., Wei,; Y., Bai, The University of North Carolina at Chapel Hill University Libraries https://doi.org/10.17615/f0v5-bs93	text	January 2016
Conjugated Small Molecule for Efficient Hole Transport in High-Performance p-i-n Type Perovskite Solar Cells Yang, L.; Cai, F.; Yan, Y. Wiley https://doi.org/10.17863/cam.12224	journalarticle	January 2017
Crystallization kinetics and morphology control of formamidinium-cesium mixed-cation lead mixed-halide perovskite via tunability of the colloidal precursor solution McMeekin, David; Wang, Zhiping; Rehman, Waqaas Proceedings of the 2nd Asia-Pacific Hybrid and Organic Photovoltaics https://doi.org/10.29363/nanoge.ap-hopv.2018.037	conference	January 2018
High Performance Planar Structure Perovskite Solar Cells Using a Solvent Dripping Treatment on Hole Transporting Layer Wang, Xuhui; Lu, Gang; Zhang, Min Coatings, Vol. 10, Issue 2 https://doi.org/10.3390/coatings10020127	journal	February 2020
Hysteresis Passivation in Planar Perovskite Solar Cells Utilizing Facile Chemical Vapor Deposition Process and PCBM Interlayer Yang, Chongqiu; Shan, Xiaobiao; Xie, Tao Energies, Vol. 12, Issue 23 https://doi.org/10.3390/en12234508	journal	November 2019
Improving Two-Step Prepared CH3NH3PbI3 Perovskite Solar Cells by Co-Doping Potassium Halide and Water in PbI2 Layer Wu, Hsuan-Ta; Cheng, Yu-Ting; Leu, Ching-Chich Nanomaterials, Vol. 9, Issue 5 https://doi.org/10.3390/nano9050666	journal	April 2019
Acidity Suppression of Hole Transport Layer via Solution Reaction of Neutral PEDOT:PSS for Stable Perovskite Photovoltaics Kim, Minseong; Yi, Minji; Jang, Woongsik Polymers, Vol. 12, Issue 1 https://doi.org/10.3390/polym12010129	journal	January 2020
The Effect of Hole Transporting Layer in Charge Accumulation Properties of p-i-n Perovskite Solar Cells Galatopoulos, Fedros; Savva, Achilleas; Papadas, Ioannis T. arXiv https://doi.org/10.48550/arxiv.1807.07308	text	January 2018
Growth modes and quantum confinement in ultrathin vapour-deposited MAPbI₃ films Parrott, Elizabeth S.; Patel, Jay B.; Haghighirad, Amir-Abbas Karlsruhe https://doi.org/10.5445/ir/1000098046	text	January 2019

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