Статья

Efficient and stable inverted perovskite solar cells with very high fill factors via incorporation of star-shaped polymer

Qi CaoState Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, ChinaYongjiang LiThe Key Laboratory of Space Applied Physics and Chemistry, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi’an 710072, ChinaHong ZhangLaboratory of Photonics and Interfaces, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, SwitzerlandJiabao YangState Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, ChinaJian HanState Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, ChinaTing XuKey Laboratory of Micro-Nano Electronic Devices and Smart Systems of Zhejiang Province, Zhejiang University, Zhejiang 310027, ChinaShuangjie WangState Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, ChinaZishuai WangDepartment of Electrical and Electronic Engineering, The University of Hong Kong, Pokfulam Road, Hong KongBingyu GaoState Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, ChinaJunsong ZhaoState Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, ChinaXiaoqiang LiState Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, ChinaXiaoyan MaThe Key Laboratory of Space Applied Physics and Chemistry, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi’an 710072, ChinaShaik M. ZakeeruddinLaboratory of Photonics and Interfaces, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, SwitzerlandWei E. I. ShaKey Laboratory of Micro-Nano Electronic Devices and Smart Systems of Zhejiang Province, Zhejiang University, Zhejiang 310027, ChinaXuanhua LiState Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, ChinaMichaël GrätzelLaboratory of Photonics and Interfaces, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland

2021en

ABI

Аннотация

Stabilizing high-efficiency perovskite solar cells (PSCs) at operating conditions remains an unresolved issue hampering its large-scale commercial deployment. Here, we report a star-shaped polymer to improve charge transport and inhibit ion migration at the perovskite interface. The incorporation of multiple chemical anchor sites in the star-shaped polymer branches strongly controls the crystallization of perovskite film with lower trap density and higher carrier mobility and thus inhibits the nonradiative recombination and reduces the charge-transport loss. Consequently, the modified inverted PSCs show an optimal power conversion efficiency of 22.1% and a very high fill factor (FF) of 0.862, corresponding to 95.4% of the Shockley-Queisser limited FF (0.904) of PSCs with a 1.59-eV bandgap. The modified devices exhibit excellent long-term operational and thermal stability at the maximum power point for 1000 hours at 45°C under continuous one-sun illumination without any significant loss of efficiency.

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Идентификаторы

DOI: 10.1126/sciadv.abg0633

Цитирования и источники

Цитирований: 3Использованных источников: 0

Показатели — AkademScholar