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Title: Suppressing defects through the synergistic effect of a Lewis base and a Lewis acid for highly efficient and stable perovskite solar cells

Abstract

Achieving long-term operational stability at a high efficiency level for perovskite solar cells is the most challenging issue toward commercialization of this emerging photovoltaic technology. Here, we investigated the cooperation of a Lewis base and a Lewis acid by combining commercial bis-PCBM mixed isomers as the Lewis acid in the antisolvent and N-(4-bromophenyl)thiourea (BrPh-ThR) as the Lewis base in the perovskite solution precursor. The combination of the Lewis base and the Lewis acid synergistically passivates Pb2+ and PbX3– antisite defects, enlarges the perovskite grain size, and improves charge-carrier separation and transport, leading to improved device efficiency from 19.3% to 21.7%. In addition, this Lewis base and acid combination also suppresses moisture incursion and passivates pinholes generated in the hole-transporting layer. Furthermore, the unsealed devices remained at 93% of the initial efficiency value in ambient air (10–20% relative humidity) after 3600 h at 20–25 °C and dropped by 10% after 1500 h under continuous operation at 1-sun illumination and 55 °C in nitrogen with maximum power-point tracking.

Authors:
ORCiD logo [1];  [2];  [3]; ORCiD logo [4]; ORCiD logo [4]; ORCiD logo [4]; ORCiD logo [3]; ORCiD logo [4];  [3]
  1. National Renewable Energy Lab. (NREL), Golden, CO (United States); Ecole Polytechnique Federal de Lausanne (EPFL), Lausanne (Switzerland)
  2. Sun Yat-sen Univ., Guangzhou (People's Republic of China)
  3. Ecole Polytechnique Federal de Lausanne (EPFL), Lausanne (Switzerland)
  4. National Renewable Energy Lab. (NREL), Golden, CO (United States)
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1478732
Alternate Identifier(s):
OSTI ID: 1478267
Report Number(s):
NREL/JA-5900-71829
Journal ID: ISSN 1754-5692; EESNBY
Grant/Contract Number:  
AC36-08GO28308
Resource Type:
Accepted Manuscript
Journal Name:
Energy & Environmental Science
Additional Journal Information:
Journal Volume: 11; Journal Issue: 12; Journal ID: ISSN 1754-5692
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 36 MATERIALS SCIENCE; perovskite solar cells; stability; efficiency; photovoltaics; Lewis base; Lewis acid

Citation Formats

Zhang, Fei, Bi, Dongqin, Pellet, Norman, Xiao, Chuanxiao, Li, Zhen, Berry, Joseph J., Zakeeruddin, Shaik Mohammed, Zhu, Kai, and Grätzel, Michael. Suppressing defects through the synergistic effect of a Lewis base and a Lewis acid for highly efficient and stable perovskite solar cells. United States: N. p., 2018. Web. doi:10.1039/C8EE02252F.
Zhang, Fei, Bi, Dongqin, Pellet, Norman, Xiao, Chuanxiao, Li, Zhen, Berry, Joseph J., Zakeeruddin, Shaik Mohammed, Zhu, Kai, & Grätzel, Michael. Suppressing defects through the synergistic effect of a Lewis base and a Lewis acid for highly efficient and stable perovskite solar cells. United States. doi:10.1039/C8EE02252F.
Zhang, Fei, Bi, Dongqin, Pellet, Norman, Xiao, Chuanxiao, Li, Zhen, Berry, Joseph J., Zakeeruddin, Shaik Mohammed, Zhu, Kai, and Grätzel, Michael. Mon . "Suppressing defects through the synergistic effect of a Lewis base and a Lewis acid for highly efficient and stable perovskite solar cells". United States. doi:10.1039/C8EE02252F. https://www.osti.gov/servlets/purl/1478732.
@article{osti_1478732,
title = {Suppressing defects through the synergistic effect of a Lewis base and a Lewis acid for highly efficient and stable perovskite solar cells},
author = {Zhang, Fei and Bi, Dongqin and Pellet, Norman and Xiao, Chuanxiao and Li, Zhen and Berry, Joseph J. and Zakeeruddin, Shaik Mohammed and Zhu, Kai and Grätzel, Michael},
abstractNote = {Achieving long-term operational stability at a high efficiency level for perovskite solar cells is the most challenging issue toward commercialization of this emerging photovoltaic technology. Here, we investigated the cooperation of a Lewis base and a Lewis acid by combining commercial bis-PCBM mixed isomers as the Lewis acid in the antisolvent and N-(4-bromophenyl)thiourea (BrPh-ThR) as the Lewis base in the perovskite solution precursor. The combination of the Lewis base and the Lewis acid synergistically passivates Pb2+ and PbX3– antisite defects, enlarges the perovskite grain size, and improves charge-carrier separation and transport, leading to improved device efficiency from 19.3% to 21.7%. In addition, this Lewis base and acid combination also suppresses moisture incursion and passivates pinholes generated in the hole-transporting layer. Furthermore, the unsealed devices remained at 93% of the initial efficiency value in ambient air (10–20% relative humidity) after 3600 h at 20–25 °C and dropped by 10% after 1500 h under continuous operation at 1-sun illumination and 55 °C in nitrogen with maximum power-point tracking.},
doi = {10.1039/C8EE02252F},
journal = {Energy & Environmental Science},
number = 12,
volume = 11,
place = {United States},
year = {2018},
month = {10}
}

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Cited by: 43 works
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Figures / Tables:

Figure 1 Figure 1: (a) Schematic diagram of antisolvent process; (b) Schematic reaction process of perovskite growth resulting from combination of the Lewis base BrPh-ThR in the perovskite-solution precursor and the Lewis acid bis-PCBM in the antisolvent process.

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Works referenced in this record:

Induced Crystallization of Perovskites by a Perylene Underlayer for High-Performance Solar Cells
journal, May 2016


Self-formed grain boundary healing layer for highly efficient CH3NH3PbI3 perovskite solar cells
journal, June 2016


Tailored interfaces of unencapsulated perovskite solar cells for >1,000 hour operational stability
journal, January 2018


Adamantanes Enhance the Photovoltaic Performance and Operational Stability of Perovskite Solar Cells by Effective Mitigation of Interfacial Defect States
journal, April 2018

  • Tavakoli, Mohammad Mahdi; Bi, Dongqin; Pan, Linfeng
  • Advanced Energy Materials, Vol. 8, Issue 19
  • DOI: 10.1002/aenm.201800275

Improved performance and stability of perovskite solar cells by crystal crosslinking with alkylphosphonic acid ω-ammonium chlorides
journal, August 2015

  • Li, Xiong; Ibrahim Dar, M.; Yi, Chenyi
  • Nature Chemistry, Vol. 7, Issue 9
  • DOI: 10.1038/nchem.2324

Recent Advances in Improving the Stability of Perovskite Solar Cells
journal, November 2015

  • Tiep, Nguyen Huy; Ku, Zhiliang; Fan, Hong Jin
  • Advanced Energy Materials, Vol. 6, Issue 3
  • DOI: 10.1002/aenm.201501420

Suppressing defects through thiadiazole derivatives that modulate CH 3 NH 3 PbI 3 crystal growth for highly stable perovskite solar cells under dark conditions
journal, January 2018

  • Zhu, Hongwei; Zhang, Fei; Xiao, Yin
  • Journal of Materials Chemistry A, Vol. 6, Issue 12
  • DOI: 10.1039/C8TA00769A

A Bifunctional Lewis Base Additive for Microscopic Homogeneity in Perovskite Solar Cells
journal, August 2017


High-performance photovoltaic perovskite layers fabricated through intramolecular exchange
journal, May 2015


A perylene diimide based polymer: a dual function interfacial material for efficient perovskite solar cells
journal, January 2017

  • Meng, Fanqi; Liu, Kuan; Dai, Shuixing
  • Materials Chemistry Frontiers, Vol. 1, Issue 6
  • DOI: 10.1039/C6QM00309E

Passivated Perovskite Crystallization via g -C 3 N 4 for High-Performance Solar Cells
journal, December 2017

  • Jiang, Lu-Lu; Wang, Zhao-Kui; Li, Meng
  • Advanced Functional Materials, Vol. 28, Issue 7
  • DOI: 10.1002/adfm.201705875

Colloidally prepared La-doped BaSnO 3 electrodes for efficient, photostable perovskite solar cells
journal, March 2017


Giant switchable photovoltaic effect in organometal trihalide perovskite devices
journal, December 2014

  • Xiao, Zhengguo; Yuan, Yongbo; Shao, Yuchuan
  • Nature Materials, Vol. 14, Issue 2
  • DOI: 10.1038/nmat4150

Efficient luminescent solar cells based on tailored mixed-cation perovskites
journal, January 2016


Tuning the crystal growth of perovskite thin-films by adding the 2-pyridylthiourea additive for highly efficient and stable solar cells prepared in ambient air
journal, January 2017

  • Sun, Mengna; Zhang, Fei; Liu, Hongli
  • Journal of Materials Chemistry A, Vol. 5, Issue 26
  • DOI: 10.1039/C7TA00894E

Ion Migration in Organometal Trihalide Perovskite and Its Impact on Photovoltaic Efficiency and Stability
journal, January 2016


Stable High-Performance Perovskite Solar Cells via Grain Boundary Passivation
journal, March 2018


π-Conjugated Lewis Base: Efficient Trap-Passivation and Charge-Extraction for Hybrid Perovskite Solar Cells
journal, December 2016


High-Mobility p-Type Organic Semiconducting Interlayer Enhancing Efficiency and Stability of Perovskite Solar Cells
journal, April 2017


Hysteresis-free perovskite solar cells made of potassium-doped organometal halide perovskite
journal, September 2017


Organometal halide perovskite solar cells: degradation and stability
journal, January 2016

  • Berhe, Taame Abraha; Su, Wei-Nien; Chen, Ching-Hsiang
  • Energy & Environmental Science, Vol. 9, Issue 2
  • DOI: 10.1039/C5EE02733K

Influence of Electrode Interfaces on the Stability of Perovskite Solar Cells: Reduced Degradation Using MoO x /Al for Hole Collection
journal, April 2016


Electron-hole diffusion lengths > 175 μm in solution-grown CH 3 NH 3 PbI 3 single crystals
journal, January 2015


Fluorinated fused nonacyclic interfacial materials for efficient and stable perovskite solar cells
journal, January 2017

  • Liu, Kuan; Dai, Shuixing; Meng, Fanqi
  • J. Mater. Chem. A, Vol. 5, Issue 40
  • DOI: 10.1039/C7TA06923E

Isomer-Pure Bis-PCBM-Assisted Crystal Engineering of Perovskite Solar Cells Showing Excellent Efficiency and Stability
journal, February 2017


Planar Heterojunction Perovskite Solar Cells via Vapor-Assisted Solution Process
journal, December 2013

  • Chen, Qi; Zhou, Huanping; Hong, Ziruo
  • Journal of the American Chemical Society, Vol. 136, Issue 2, p. 622-625
  • DOI: 10.1021/ja411509g

Highly Efficient and Stable Perovskite Solar Cells Based on Monolithically Grained CH 3 NH 3 PbI 3 Film
journal, December 2016


Investigation on the role of Lewis bases in the ripening process of perovskite films for highly efficient perovskite solar cells
journal, January 2017

  • Zhu, Lifeng; Xu, Yuzuan; Zhang, Pengpeng
  • J. Mater. Chem. A, Vol. 5, Issue 39
  • DOI: 10.1039/C7TA05378A

Low-temperature solution-processed wavelength-tunable perovskites for lasing
journal, March 2014

  • Xing, Guichuan; Mathews, Nripan; Lim, Swee Sien
  • Nature Materials, Vol. 13, Issue 5
  • DOI: 10.1038/nmat3911

Fused-Ring Electron Acceptor ITIC-Th: A Novel Stabilizer for Halide Perovskite Precursor Solution
journal, March 2018

  • Qin, Minchao; Cao, Jie; Zhang, Tiankai
  • Advanced Energy Materials, Vol. 8, Issue 18
  • DOI: 10.1002/aenm.201703399

Perovskite solar cells with 18.21% efficiency and area over 1 cm2 fabricated by heterojunction engineering
journal, September 2016


Chemical Reduction of Intrinsic Defects in Thicker Heterojunction Planar Perovskite Solar Cells
journal, April 2017


Bulk heterojunction perovskite hybrid solar cells with large fill factor
journal, January 2015

  • Wang, Kai; Liu, Chang; Du, Pengcheng
  • Energy & Environmental Science, Vol. 8, Issue 4
  • DOI: 10.1039/C5EE00222B

A Fast Deposition-Crystallization Procedure for Highly Efficient Lead Iodide Perovskite Thin-Film Solar Cells
journal, July 2014


Polymer-templated nucleation and crystal growth of perovskite films for solar cells with efficiency greater than 21%
journal, September 2016


Bulk heterojunction perovskite–PCBM solar cells with high fill factor
journal, February 2016


Perovskite–fullerene hybrid materials suppress hysteresis in planar diodes
journal, May 2015

  • Xu, Jixian; Buin, Andrei; Ip, Alexander H.
  • Nature Communications, Vol. 6, Issue 1
  • DOI: 10.1038/ncomms8081

Lewis Acid–Base Adduct Approach for High Efficiency Perovskite Solar Cells
journal, January 2016


A Lewis Base-Assisted Passivation Strategy Towards Highly Efficient and Stable Perovskite Solar Cells
journal, May 2018


Enhanced Photoluminescence and Solar Cell Performance via Lewis Base Passivation of Organic–Inorganic Lead Halide Perovskites
journal, September 2014

  • Noel, Nakita K.; Abate, Antonio; Stranks, Samuel D.
  • ACS Nano, Vol. 8, Issue 10
  • DOI: 10.1021/nn5036476

Efficient planar heterojunction perovskite solar cells by vapour deposition
journal, September 2013

  • Liu, Mingzhen; Johnston, Michael B.; Snaith, Henry J.
  • Nature, Vol. 501, Issue 7467, p. 395-398
  • DOI: 10.1038/nature12509

A vacuum flash–assisted solution process for high-efficiency large-area perovskite solar cells
journal, June 2016


Stable high efficiency two-dimensional perovskite solar cells via cesium doping
journal, January 2017

  • Zhang, Xu; Ren, Xiaodong; Liu, Bin
  • Energy & Environmental Science, Vol. 10, Issue 10
  • DOI: 10.1039/C7EE01145H

Incorporation of rubidium cations into perovskite solar cells improves photovoltaic performance
journal, September 2016


Achieving long-term stable perovskite solar cells via ion neutralization
journal, January 2016

  • Back, Hyungcheol; Kim, Geunjin; Kim, Junghwan
  • Energy & Environmental Science, Vol. 9, Issue 4
  • DOI: 10.1039/C6EE00612D

Enhanced Performance of Perovskite Solar Cells with Zinc Chloride Additives
journal, December 2017

  • Jin, Junjie; Li, Hao; Chen, Cong
  • ACS Applied Materials & Interfaces, Vol. 9, Issue 49
  • DOI: 10.1021/acsami.7b15310

Impact of grain boundaries on efficiency and stability of organic-inorganic trihalide perovskites
journal, December 2017


Defect passivation in hybrid perovskite solar cells using quaternary ammonium halide anions and cations
journal, June 2017


A PCBM-assisted perovskite growth process to fabricate high efficiency semitransparent solar cells
journal, January 2016

  • Li, Chao; Sleppy, Joseph; Dhasmana, Nitesh
  • Journal of Materials Chemistry A, Vol. 4, Issue 30
  • DOI: 10.1039/C6TA04790D

Supramolecular Halogen Bond Passivation of Organic–Inorganic Halide Perovskite Solar Cells
journal, May 2014

  • Abate, Antonio; Saliba, Michael; Hollman, Derek J.
  • Nano Letters, Vol. 14, Issue 6
  • DOI: 10.1021/nl500627x

Systematic investigation of the impact of operation conditions on the degradation behaviour of perovskite solar cells
journal, January 2018


    Works referencing / citing this record:

    Enhanced Charge Transport by Incorporating Formamidinium and Cesium Cations into Two-Dimensional Perovskite Solar Cells
    journal, July 2019

    • Gao, Liguo; Zhang, Fei; Chen, Xihan
    • Angewandte Chemie International Edition, Vol. 58, Issue 34
    • DOI: 10.1002/anie.201905690

    Progress in Multifunctional Molecules for Perovskite Solar Cells
    journal, July 2019


    Enhanced Charge Transport by Incorporating Formamidinium and Cesium Cations into Two-Dimensional Perovskite Solar Cells
    journal, July 2019

    • Gao, Liguo; Zhang, Fei; Chen, Xihan
    • Angewandte Chemie International Edition, Vol. 58, Issue 34
    • DOI: 10.1002/anie.201905690

    Progress in Multifunctional Molecules for Perovskite Solar Cells
    journal, July 2019


      Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.