Stable Formamidinium-Based Perovskite Solar Cells via In Situ Grain Encapsulation
Abstract
Abstract Formamidinium (FA)‐based lead iodide perovskites have emerged as the most promising light‐absorber materials in the prevailing perovskite solar cells (PSCs). However, they suffer from the phase‐instability issue in the ambient atmosphere, which is holding back the realization of the full potential of FA‐based PSCs in the context of high efficiency and stability. Herein, the tetraethylorthosilicate hydrolysis process is integrated with the solution crystallization of FA‐based perovskites, forming a new film structure with individual perovskite grains encapsulated by amorphous silica layers that are in situ formed at the nanoscale. The silica not only protects perovskite grains from the degradation but also enhances the charge‐carrier dynamics of perovskite films. The underlying mechanism is discussed using a joint experiment‐theory approach. Through this in situ grain encapsulation method, PSCs show an efficiency close to 20% with an impressive 97% retention after 1000‐h storage under ambient conditions.
- Authors:
-
[6]
- Peking Univ., Beijing (China)
- Brown Univ., Providence, RI (United States)
- National Renewable Energy Lab. (NREL), Golden, CO (United States); Northwestern Polytechnical Univ., Xi'an (China)
- Univ. of Nebraska, Lincoln, NE (United States)
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Peking Univ., Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China); Shanxi Univ. (China)
- Publication Date:
- Research Org.:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- OSTI Identifier:
- 1457665
- Alternate Identifier(s):
- OSTI ID: 1439768
- Report Number(s):
- NREL/JA-5900-71191
Journal ID: ISSN 1614-6832
- Grant/Contract Number:
- AC36-08GO28308; DE‐AC36‐08‐GO28308
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Advanced Energy Materials
- Additional Journal Information:
- Journal Volume: 8; Journal Issue: 22; Journal ID: ISSN 1614-6832
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 14 SOLAR ENERGY; 36 MATERIALS SCIENCE; charge transport; encapsulate; perovskite; silica; stability
Citation Formats
Liu, Tanghao, Zhou, Yuanyuan, Li, Zhen, Zhang, Lin, Ju, Ming-Gang, Luo, Deying, Yang, Ye, Yang, Mengjin, Kim, Dong Hoe, Yang, Wenqiang, Padture, Nitin P., Beard, Matthew C., Zeng, Xiao Cheng, Zhu, Kai, Gong, Qihuang, and Zhu, Rui. Stable Formamidinium-Based Perovskite Solar Cells via In Situ Grain Encapsulation. United States: N. p., 2018.
Web. doi:10.1002/aenm.201800232.
Liu, Tanghao, Zhou, Yuanyuan, Li, Zhen, Zhang, Lin, Ju, Ming-Gang, Luo, Deying, Yang, Ye, Yang, Mengjin, Kim, Dong Hoe, Yang, Wenqiang, Padture, Nitin P., Beard, Matthew C., Zeng, Xiao Cheng, Zhu, Kai, Gong, Qihuang, & Zhu, Rui. Stable Formamidinium-Based Perovskite Solar Cells via In Situ Grain Encapsulation. United States. https://doi.org/10.1002/aenm.201800232
Liu, Tanghao, Zhou, Yuanyuan, Li, Zhen, Zhang, Lin, Ju, Ming-Gang, Luo, Deying, Yang, Ye, Yang, Mengjin, Kim, Dong Hoe, Yang, Wenqiang, Padture, Nitin P., Beard, Matthew C., Zeng, Xiao Cheng, Zhu, Kai, Gong, Qihuang, and Zhu, Rui. Thu .
"Stable Formamidinium-Based Perovskite Solar Cells via In Situ Grain Encapsulation". United States. https://doi.org/10.1002/aenm.201800232. https://www.osti.gov/servlets/purl/1457665.
@article{osti_1457665,
title = {Stable Formamidinium-Based Perovskite Solar Cells via In Situ Grain Encapsulation},
author = {Liu, Tanghao and Zhou, Yuanyuan and Li, Zhen and Zhang, Lin and Ju, Ming-Gang and Luo, Deying and Yang, Ye and Yang, Mengjin and Kim, Dong Hoe and Yang, Wenqiang and Padture, Nitin P. and Beard, Matthew C. and Zeng, Xiao Cheng and Zhu, Kai and Gong, Qihuang and Zhu, Rui},
abstractNote = {Abstract Formamidinium (FA)‐based lead iodide perovskites have emerged as the most promising light‐absorber materials in the prevailing perovskite solar cells (PSCs). However, they suffer from the phase‐instability issue in the ambient atmosphere, which is holding back the realization of the full potential of FA‐based PSCs in the context of high efficiency and stability. Herein, the tetraethylorthosilicate hydrolysis process is integrated with the solution crystallization of FA‐based perovskites, forming a new film structure with individual perovskite grains encapsulated by amorphous silica layers that are in situ formed at the nanoscale. The silica not only protects perovskite grains from the degradation but also enhances the charge‐carrier dynamics of perovskite films. The underlying mechanism is discussed using a joint experiment‐theory approach. Through this in situ grain encapsulation method, PSCs show an efficiency close to 20% with an impressive 97% retention after 1000‐h storage under ambient conditions.},
doi = {10.1002/aenm.201800232},
journal = {Advanced Energy Materials},
number = 22,
volume = 8,
place = {United States},
year = {Thu May 31 00:00:00 EDT 2018},
month = {Thu May 31 00:00:00 EDT 2018}
}
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Figure 1: Schematic illustration showing A) the mixing of the FA‐based perovskite precursor solution and the silica precursors in “one pot,” B) the formation of silica oligomers via the hydrolysis reaction of TEOS with water, and C) the formation process of the FA‐based perovskite film consisting of individual silica‐encapsulated grainsmore »
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