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Title: Facile fabrication of large-grain CH3NH3PbI3-xBrx films for high-efficiency solar cells via CH3NH3Br-selective Ostwald ripening

Abstract

Organometallic halide perovskite solar cells (PSCs) have shown great promise as a low-cost, high-efficiency photovoltaic technology. Structural and electro-optical properties of the perovskite absorber layer are most critical to device operation characteristics. Here we present a facile fabrication of high-efficiency PSCs based on compact, large-grain, pinhole-free CH3NH3PbI3-xBrx (MAPbI3-xBrx) thin films with high reproducibility. A simple methylammonium bromide (MABr) treatment via spin-coating with a proper MABr concentration converts MAPbI3 thin films with different initial film qualities (for example, grain size and pinholes) to high-quality MAPbI3-xBrx thin films following an Ostwald ripening process, which is strongly affected by MABr concentration and is ineffective when replacing MABr with methylammonium iodide. A higher MABr concentration enhances I-Br anion exchange reaction, yielding poorer device performance. Lastly, this MABr-selective Ostwald ripening process improves cell efficiency but also enhances device stability and thus represents a simple, promising strategy for further improving PSC performance with higher reproducibility and reliability.

Authors:
 [1];  [2];  [1]; ORCiD logo [1];  [2];  [1];  [2];  [1];  [1];  [2]
  1. National Renewable Energy Lab. (NREL), Golden, CO (United States). Chemistry and Nanoscience Center
  2. Shanghai Jiao Tong Univ. (China). School of Environmental Science and Engineering
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office; NSFC
OSTI Identifier:
1287447
Report Number(s):
NREL/JA-5900-65980
Journal ID: ISSN 2041-1723
Grant/Contract Number:  
AC36-08GO28308; 51372151; 21303103
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 7; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 36 MATERIALS SCIENCE; perovskite solar cells; PSC; Ostwald ripening

Citation Formats

Yang, Mengjin, Zhang, Taiyang, Schulz, Philip, Li, Zhen, Li, Ge, Kim, Dong Hoe, Guo, Nanjie, Berry, Joseph J., Zhu, Kai, and Zhao, Yixin. Facile fabrication of large-grain CH3NH3PbI3-xBrx films for high-efficiency solar cells via CH3NH3Br-selective Ostwald ripening. United States: N. p., 2016. Web. https://doi.org/10.1038/ncomms12305.
Yang, Mengjin, Zhang, Taiyang, Schulz, Philip, Li, Zhen, Li, Ge, Kim, Dong Hoe, Guo, Nanjie, Berry, Joseph J., Zhu, Kai, & Zhao, Yixin. Facile fabrication of large-grain CH3NH3PbI3-xBrx films for high-efficiency solar cells via CH3NH3Br-selective Ostwald ripening. United States. https://doi.org/10.1038/ncomms12305
Yang, Mengjin, Zhang, Taiyang, Schulz, Philip, Li, Zhen, Li, Ge, Kim, Dong Hoe, Guo, Nanjie, Berry, Joseph J., Zhu, Kai, and Zhao, Yixin. Mon . "Facile fabrication of large-grain CH3NH3PbI3-xBrx films for high-efficiency solar cells via CH3NH3Br-selective Ostwald ripening". United States. https://doi.org/10.1038/ncomms12305. https://www.osti.gov/servlets/purl/1287447.
@article{osti_1287447,
title = {Facile fabrication of large-grain CH3NH3PbI3-xBrx films for high-efficiency solar cells via CH3NH3Br-selective Ostwald ripening},
author = {Yang, Mengjin and Zhang, Taiyang and Schulz, Philip and Li, Zhen and Li, Ge and Kim, Dong Hoe and Guo, Nanjie and Berry, Joseph J. and Zhu, Kai and Zhao, Yixin},
abstractNote = {Organometallic halide perovskite solar cells (PSCs) have shown great promise as a low-cost, high-efficiency photovoltaic technology. Structural and electro-optical properties of the perovskite absorber layer are most critical to device operation characteristics. Here we present a facile fabrication of high-efficiency PSCs based on compact, large-grain, pinhole-free CH3NH3PbI3-xBrx (MAPbI3-xBrx) thin films with high reproducibility. A simple methylammonium bromide (MABr) treatment via spin-coating with a proper MABr concentration converts MAPbI3 thin films with different initial film qualities (for example, grain size and pinholes) to high-quality MAPbI3-xBrx thin films following an Ostwald ripening process, which is strongly affected by MABr concentration and is ineffective when replacing MABr with methylammonium iodide. A higher MABr concentration enhances I-Br anion exchange reaction, yielding poorer device performance. Lastly, this MABr-selective Ostwald ripening process improves cell efficiency but also enhances device stability and thus represents a simple, promising strategy for further improving PSC performance with higher reproducibility and reliability.},
doi = {10.1038/ncomms12305},
journal = {Nature Communications},
number = ,
volume = 7,
place = {United States},
year = {2016},
month = {8}
}

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    Methylammonium-chloride post-treatment on perovskite surface and its correlation to photovoltaic performance in the aspect of electronic traps
    journal, July 2019

    • Hwang, Taehyun; Yun, Alan Jiwan; Lee, Byungho
    • Journal of Applied Physics, Vol. 126, Issue 2
    • DOI: 10.1063/1.5098336

    The investigation of the unseen interrelationship of grain size, ionic defects, device physics and performance of perovskite solar cells
    journal, January 2019

    • Ameri, Mohsen; Mohajerani, Ezeddin; Ghafarkani, Mashhood
    • Journal of Physics D: Applied Physics, Vol. 52, Issue 12
    • DOI: 10.1088/1361-6463/aafea9

    Towards large-area perovskite solar cells: the influence of compact and mesoporous TiO 2 electron transport layers
    journal, July 2018


    Beneficial impact of materials with reduced dimensionality on the stability of perovskite-based photovoltaics
    journal, August 2019

    • Petrović, Miloš; Rogdakis, Konstantinos; Kymakis, Emmanuel
    • Journal of Physics: Energy, Vol. 1, Issue 4
    • DOI: 10.1088/2515-7655/ab3585

    Enhanced mobility CsPbI 3 quantum dot arrays for record-efficiency, high-voltage photovoltaic cells
    journal, October 2017

    • Sanehira, Erin M.; Marshall, Ashley R.; Christians, Jeffrey A.
    • Science Advances, Vol. 3, Issue 10
    • DOI: 10.1126/sciadv.aao4204

    The Synthesis of 2D CH 3 NH 3 PbI 3 Perovskite Films with Tunable Bandgaps by Solution Deposition Route
    journal, February 2019

    • Loryuenyong, Vorrada; Thongpon, Pajaree; Saudmalai, Sasathorn
    • International Journal of Photoenergy, Vol. 2019
    • DOI: 10.1155/2019/7492453

    Improved Performance of Perovskite Light-Emitting Diodes by Quantum Confinement Effect in Perovskite Nanocrystals
    journal, June 2018

    • Chen, Lung-Chien; Tseng, Zong-Liang; Lin, Dai-Wei
    • Nanomaterials, Vol. 8, Issue 7
    • DOI: 10.3390/nano8070459