Efficient Inverted Perovskite Solar Cells with a Low-Dimensional Halide/Perovskite Heterostructure

被引:25
作者
Zhang, Yao [1 ]
Li, Chunyan [1 ]
Bi, Enbing [2 ]
Wang, Tao [1 ]
Zhang, Peng [1 ,3 ]
Yang, Xudong [1 ,4 ]
Chen, Han [1 ,3 ,4 ]
机构
[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai 200240, Peoples R China
[2] Shanghai Liyuan New Energy Technol Co Ltd, Shanghai 201400, Peoples R China
[3] Shanghai Jiao Tong Univ, Joint Res Ctr Clean Energy Mat, Shanghai 200240, Peoples R China
[4] Shanghai Jiao Tong Univ, Innovat Ctr Future Mat, Zhangjiang Inst Adv Study, Shanghai 201203, Peoples R China
基金
中国国家自然科学基金; 上海市自然科学基金;
关键词
1D perovskites; inverted perovskite solar cells; imidazolium; interfaces; ionic liquids; passivation;
D O I
10.1002/aenm.202202191
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The photovoltaic performance of inverted (positive-intrinsic-negative) perovskite solar cells (PSCs) is predominantly limited by interfacial recombination loss. Here, by constructing a low-dimensional halide/perovskite heterostructure, non-radiative recombination pathways at the perovskite/C-60 contact are effectively eliminated and a voltage loss of only 370 mV is achieved in inverted PSCs. Through molecular engineering of the organic spacer, a strong electronic coupling is enabled at the heterointerface, which effectively shifts the gap states out of the bandgap and leads to a prolonged carrier lifetime of 4.28 mu s. Our strategy enables a power conversion efficiency of 24.09% (certified 23.54%) for inverted PSCs with an open-circuit voltage of 1204 mV, and an efficiency of 21.89% (certified 21.48%) for centimeter-scale cells. The devices retain 92% of the initial efficiency after 85 degrees C thermal aging for over 1400 h, and 95% of the initial efficiency after 1008 h of maximum power point operation under AM1.5G illumination in air.
引用
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页数:9
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