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

Xinlong Wang ¹Jingming Zheng ¹Zhiqin Ying ²Xin Li ¹Meili Zhang ²Xuchao Guo ¹Shiqian Su ²Jingsong Sun ²Xi Yang ²Jichun Ye²

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作者信息

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;University of Chinese Academy of Sciences,Beijing 100049,China
2. 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
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Abstract

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 cap-ping 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(～30 μm)flexible perovskite/silicon tandem solar cellachieves 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.

Key words

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

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基金项目

Key Research and Development Program of Ningbo(2023Z151)

Key Research and Development Program of Zhejiang Province(2022C01215)

Key Research and Development Program of Zhejiang Province(2024C01092)

China Postdoctoral Science Foundation(2023M743620)

Joint Funds of the Zhejiang Provincial Natural Science Foundation of China(LBMHD24E020002)

Zhejiang Provincial Natural Science Foundation of China(LY24F040003)

National Key Research and Development of China(2018YFB1500103)

National Natural Science Foundation of China(62204245)

National Natural Science Foundation of China(U23A200098)

出版年

2024

科学通报(英文版)

中国科学院

科学通报(英文版)

CSTPCD

ISSN：1001-6538

参考文献量1

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