题目：

Dual Sub-Cells Modification Enables High-Efficiency n–i–p Type Monolithic Perovskite/Organic Tandem Solar Cells

作者：

Qin Yao¹, Yue-Min Xie^1,2,3*, Yingzhi Zhou¹, Qifan Xue¹*, Xin Xu⁴, Yujia Gao⁴, Tianqi Niu¹, Linghao Chu¹, Zhisheng Zhou¹, Francis R. Lin^5,6, Alex K.-Y. Jen^5,6,8, Tingting Shi⁴*, Hin-Lap Yip^1,5,7,8*, and Yong Cao¹

单位：

¹Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology Guangzhou 510640, P. R. China.

²Institute of Functional Nano & Soft Materials (FUNSOM), Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, 215123, Jiangsu, PR China.

³Jiangsu Key Laboratory of Advanced Negative Carbon Technologies Soochow University Suzhou, Jiangsu 215123, P. R. China.

⁴Siyuan Laboratory, Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University, Guangzhou, Guangdong 510632, P. R. China.

⁵Department of Materials Science and Engineering, City University of Hong Kong Kowloon 999077, Hong Kong.

⁶Department of Chemistry, City University of Hong Kong Kowloon 999077, Hong Kong.

⁷School of Energy and Environmental Science City University of Hong Kong Kowloon 999077, Hong Kong.

⁸Hong Kong Institute for Clean Energy City University of Hong Kong Kowloon 999077, Hong Kong.

摘要：

Monolithic perovskite/organic tandem solar cells (POTSCs) have attracted increasing attention owing to ability to overcome the Shockley–Queisser limit. However, compromised sub-cells performance limits the tandem device performance, and the power conversion efficiency (PCE) of POTSCs is still lower than their single-junction counterparts. Therefore, optimized sub-cells with minimal energy loss are desired for producing high-efficiency POTSCs. In this study, an ionic liquid, methylammonium acetate (MAAc), is used to modify wide-bandgap perovskite sub-cells (WPSCs), and bathocuproine (BCP) is used to modify small-bandgap organic solar cells. The Ac− group of MAAc can effectively heal the Pb defects in the all-inorganic perovskite film, which enables a high PCE of 17.16% and an open-circuit voltage (Voc) of 1.31 V for CsPbI2.2Br0.8-based WPSCs. Meanwhile, the BCP film, inserted at the ZnO/ organic bulk-heterojunction (BHJ) interface, acts as a space layer to preven  direct contact between ZnO and the BHJ while passivating the surface defects of ZnO, thereby mitigating ZnO defect-induced efficiency loss. As a result, PM6:CH1007-based SOSCs exhibit a PCE of 15.46%. Integrating these modified sub-cells enable the fabrication of monolithic n–i–p structured POTSCs with a maximum PCE of 22.43% (21.42% certified), which is one of the highest efficiencies in such type of POTSCs.

影响因子：

19.924

分区情况：

一区

链接：

https://onlinelibrary.wiley.com/doi/10.1002/adfm.202212599