Sub-1.4eV bandgap inorganic perovskite solar cells with long-term stability

Hu, Mingyu; Chen, Min; Guo, Peijun; Zhou, Hua; Deng, Junjing; Yao, Yudong; Jiang, Yi; Gong, Jue; Dai, Zhenghong; Zhou, Yunxuan; Qian, Feng; Chong, Xiaoyu; Feng, Jing; Schaller, Richard D.; Zhu, Kai; Padture, Nitin P.; Zhou, Yuanyuan

doi:10.1038/s41467-019-13908-6

Title: Sub-1.4eV bandgap inorganic perovskite solar cells with long-term stability

Journal Article · 08 January 2020 · Nature Communications

DOI: https://doi.org/10.1038/s41467-019-13908-6 · OSTI ID:1582019

^[1];

^[2];

^[3]; Zhou, Hua ^[3];

^[3]; Yao, Yudong ^[3]; Jiang, Yi ^[3]; Gong, Jue ^[2]; Dai, Zhenghong ^[2]; Zhou, Yunxuan ^[4]; Qian, Feng ^[4]; Chong, Xiaoyu ^[4]; Feng, Jing ^[4];

^[5];

^[6];

^[2]; Zhou, Yuanyuan ^[2]

Kunming Univ. of Science and Technology, Yunan (China); Brown Univ., Providence, RI (United States)
Brown Univ., Providence, RI (United States)
Argonne National Lab. (ANL), Lemont, IL (United States)
Kunming Univ. of Science and Technology, Yunan (China)
Argonne National Lab. (ANL), Lemont, IL (United States); Northwestern Univ., Evanston, IL (United States)
National Renewable Energy Lab. (NREL), Golden, CO (United States)

State-of-the-art halide perovskite solar cells have bandgaps larger than 1.45 eV, which restricts their potential for realizing the Shockley-Queisser limit. Previous search for low-bandgap (1.2 to 1.4 eV) halide perovskites has resulted in several candidates, but all are hybrid organic-inorganic compositions, raising potential concern regarding device stability. Here we show the promise of an inorganic low-bandgap (1.38 eV) CsPb_0.6Sn_0.4I₃ perovskite stabilized via interface functionalization. Device efficiency up to 13.37% is demonstrated. The device shows high operational stability under one-sun-intensity illumination, with T₈₀ and T₇₀ lifetimes of 653 h and 1045 h, respectively (T₈₀ and T₇₀ represent efficiency decays to 80% and 70% of the initial value, respectively), and long-term shelf stability under nitrogen atmosphere. Controlled exposure of the device to ambient atmosphere during a long-term (1000 h) test does not degrade the efficiency. These findings point to a promising direction for achieving low-bandgap perovskite solar cells with high stability.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Scientific User Facilities Division; Office of Naval Research; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S)

Grant/Contract Number:: AC02-06CH11357; AC36-08GO28308

OSTI ID:: 1582019

Journal Information:: Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 11; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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