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Vol. 12 (2020)

Heterojunction Incorporating Perovskite and Microporous Metal–Organic Framework Nanocrystals for Efficient and Stable Solar Cells

https://doi.org/10.1007/s40820-020-00417-1
Xuesong Zhou
MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, People’s Republic of China
Lele Qiu
MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, People’s Republic of China
Ruiqing Fan
MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, People’s Republic of China
Jian Zhang
MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, People’s Republic of China
Sue Hao
MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, People’s Republic of China
Yulin Yang
MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, People’s Republic of China

Corresponding Author: Yulin Yang

ylyang@hit.edu.cn

Nano-Micro Letters, Vol. 12 (2020), Article Number: 80

Abstract

In this paper, we present a facile approach to enhance the efficiency and stability of perovskite solar cells (PSCs) by incorporating perovskite with microporous indium-based metal–organic framework [In12O(OH)16(H2O)5(btc)6]n (In-BTC) nanocrystals and forming heterojunction light-harvesting layer. The interconnected micropores and terminal oxygen sites of In-BTC allow the preferential crystallization of perovskite inside the regular cavities, endowing the derived films with improved morphology/crystallinity and reduced grain boundaries/defects. Consequently, the In-BTC-modified PSC yields enhanced fill factor of 0.79 and power conversion efficiency (PCE) of 20.87%, surpassing the pristine device (0.76 and 19.52%, respectively). More importantly, over 80% of the original PCE is retained after 12 days of exposure to ambient environment (25 °C and relative humidity of ~ 65%) without encapsulation, while only about 35% is left to the pristine device.


Highlights:


1 Microporous indium-based metal–organic framework (In-BTC) nanocrystals are synthesized under an extremely mild condition.
2 Perovskite/In-BTC heterojunction films possess improved morphology/crystallinity and reduced grain boundaries/defects.
3 In-BTC-modified perovskite solar cells exhibit significantly enhanced efficiency of 20.87% and long-term stability.

Keywords

Metal–organic framework Nanocrystal Heterojunction Light-harvesting layer Perovskite solar cell
Zhou, Xuesong, Lele Qiu, Ruiqing Fan, Jian Zhang, Sue Hao, and Yulin Yang. 2020. “Heterojunction Incorporating Perovskite and Microporous Metal–Organic Framework Nanocrystals for Efficient and Stable Solar Cells”. Nano-Micro Letters 12 (March):80. https://doi.org/10.1007/s40820-020-00417-1.
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