Fully Solution‐Processed TCO‐Free Semitransparent Perovskite Solar Cells for Tandem and Flexible Applications |
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| Authors: | Yaokang Zhang Zhongwei Wu Peng Li Luis K. Ono Yabing Qi Jixiang Zhou Hui Shen Charles Surya Zijian Zheng |
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| Affiliation: | 1. Laboratory for Advanced Interfacial Materials and Devices, Institute of Textiles and Clothing, the Hong Kong Polytechnic University, Hong Kong, China;2. Energy Materials and Surface Sciences Unit (EMSS), Okinawa Institute of Science and Technology Graduate University (OIST), Onna‐son, Okinawa, Japan;3. Institute for Solar Energy Systems, Sun Yat‐Sen University, Guangzhou, Guangdong Province, P. R. China;4. Department of Electronic and Information Engineering, the Hong Kong Polytechnic University, Hong Kong, China |
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| Abstract: | ![]()
Semitransparent perovskite solar cells (st‐PSCs) have received remarkable interest in recent years because of their great potential in applications for solar window, tandem solar cells, and flexible photovoltaics. However, all reported st‐PSCs require expensive transparent conducting oxides (TCOs) or metal‐based thin films made by vacuum deposition, which is not cost effective for large‐scale fabrication: the cost of TCOs is estimated to occupy ≈75% of the manufacturing cost of PSCs. To address this critical challenge, this study reports a low‐temperature and vacuum‐free strategy for the fabrication of highly efficient TCO‐free st‐PSCs. The TCO‐free st‐PSC on glass exhibits 13.9% power conversion efficiency (PCE), and the four‐terminal tandem cell made with the st‐PSC top cell and c‐Si bottom cell shows an overall PCE of 19.2%. Due to the low processing temperature, the fabrication of flexible st‐PSCs is demonstrated on polyethylene terephthalate and polyimide, which show excellent stability under repeated bending or even crumbing. |
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| Keywords: | perovskite solar cells semitransparent solar cells solution processing tandem solar cells TCO‐free solar cells |
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