超薄(~30μm)柔性钙钛矿/硅叠层太阳能电池  

Ultrathin(~30μm)flexible monolithic perovskite/silicon tandem solar cell

作　　者：汪新龙 郑晶铭 应智琴 李鑫 张美丽 郭旭超 苏诗茜 孙靖淞 杨熹 叶继春 Xinlong Wang;Jingming Zheng;Zhiqin Ying;Xin Li;Meili Zhang;Xuchao Guo;Shiqian Su;Jingsong Sun;Xi Yang;Jichun Ye(Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China [2]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Science Bulletin》2024年第12期1887-1894,共8页科学通报（英文版）

基　　金：supported by the Key Research and Development Program of Ningbo(2023Z151);the Key Research and Development Program of Zhejiang Province(2022C01215,2024C01092);the China Postdoctoral Science Foundation(2023M743620);the Joint Funds of the Zhejiang Provincial Natural Science Foundation of China(LBMHD24E020002);the Zhejiang Provincial Natural Science Foundation of China(LY24F040003);the National Key Research and Development of China(2018YFB1500103);the National Natural Science Foundation of China(62204245,U23A200098)。

摘　　要：The efficiency of rigid perovskite/silicon tandem solar cells has reached 33.9%.However,there has been no report on flexible perovskite/silicon tandem solar cells due to the challenge of overcoming the poor light absorption of ultrathin silicon bottom cells while maintaining their mechanical flexibility.Herein,we report the first demonstration of the perovskite/silicon tandem solar cell based on flexible ultrathin silicon.We show that reducing the wafer thicknesses and feature sizes of the light-trapping textures can significantly improve the flexibility of silicon without sacrificing light utilization.In addition,the capping of the perovskite top cells can further improve the device's mechanical durability by shifting the neutral plane toward the silicon surface that is prone to fracture.Finally,the resulting ultrathin(~30μm)flexible perovskite/silicon tandem solar cell achieves a certified stabilized efficiency of 22.8%with an extremely high power-to-weight ratio of 3.12 W g^(-1).Moreover,the flexible tandems exhibit remarkable bending durability,maintaining 98.2%of their initial performance after 3000 bending cycles at a radius of only 1 cm.

关 键 词：Flexible photovoltaics Perovskite/silicon tandem solar cells Ultrathin and lightweight photovoltaics Light-trapping nanostructures Bending durability 

分 类 号：TM914.4[电气工程—电力电子与电力传动] TB34[一般工业技术—材料科学与工程]