TY - JOUR
T1 - Sub-1.4eV bandgap inorganic perovskite solar cells with long-term stability
AU - Hu, Mingyu
AU - Chen, Min
AU - Guo, Peijun
AU - Zhou, Hua
AU - Deng, Junjing
AU - Yao, Yudong
AU - Jiang, Yi
AU - Gong, Jue
AU - Dai, Zhenghong
AU - Zhou, Yunxuan
AU - Qian, Feng
AU - Chong, Xiaoyu
AU - Feng, Jing
AU - Schaller, Richard D.
AU - Zhu, Kai
AU - Padture, Nitin P.
AU - Zhou, Yuanyuan
N1 - Funding Information:
DOE under Contract No. DE-AC36-08GO28308 with Alliance for Sustainable Energy, Limited Liability Company (LLC), the Manager and Operator of NREL, and the De-risking Halide Perovskite Solar Cells program of the National Center for Photovoltaics, funded by the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, and Solar Energy Technologies Office. M.H. acknowledges the support from Chinese Scholarship Council. Experimental assistance from Dr. Q. Dong and Mr. S.K. Yadavalli is also acknowledged.
Funding Information:
The work at Brown University was funded by the Office for Naval Research (Grant No. N00014-17-1-2232), and the National Science Foundation (Grant Nos. OIA-1538893 and OIA-1929019). The work at Kunming University of Science and Technology was funded by National Key R&D Program of China (Grant No. 2019YFB1503202). This research used resources of the Advanced Photon Source and Center for Nanoscale Materials, both U.S. Department of Energy (DOE) Office of Science User Facilities operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357. K.Z. acknowledges the support from the U.S.
PY - 2020/1/9
Y1 - 2020/1/9
N2 - 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) CsPb0.6Sn0.4I3 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.
AB - 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) CsPb0.6Sn0.4I3 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.
UR - http://www.scopus.com/inward/record.url?scp=85077681278&partnerID=8YFLogxK
U2 - 10.1038/s41467-019-13908-6
DO - 10.1038/s41467-019-13908-6
M3 - Journal article
C2 - 31919343
AN - SCOPUS:85077681278
SN - 2041-1723
VL - 11
JO - Nature Communications
JF - Nature Communications
M1 - 151
ER -
