Facile fabrication of large-grain CH 3NH 3PbI 3-xBr x films for high-efficiency solar cells via CH 3NH 3Br-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 CH 3NH 3PbI 3-xBr x (MAPbI 3-xBr x) thin films with high reproducibility. A simple methylammonium bromide (MABr) treatment via spin-coating with a proper MABr concentration converts MAPbI 3 thin films with different initial film qualities (for example, grain size and pinholes) to high-quality MAPbI 3-xBr x 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];
- National Renewable Energy Lab. (NREL), Golden, CO (United States). Chemistry and Nanoscience Center
- 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:
- Journal Article: 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. doi: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},
url = {https://www.osti.gov/biblio/1287447},
journal = {Nature Communications},
issn = {2041-1723},
number = ,
volume = 7,
place = {United States},
year = {2016},
month = {8}
}
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- Science Advances, Vol. 3, Issue 10