TiO2/ZnO/TiO2 sandwich multi‐layer films as a hole‐blocking layer for efficient perovskite solar cells |
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| Authors: | Jinxia Duan Jiamin Wu Jun Zhang Yang Xu Hao Wang Di Gao Peter D Lund |
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| Affiliation: | 1. Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Hubei Key Laboratory of Ferro & Piezoelectric Materials and Devices, Faculty of Physics and Electronic Science, Hubei University, Wuhan, China;2. Department of Chemical and Petroleum Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania, USA;3. Department of Applied Physics, Aalto University, Espoo, Finland |
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| Abstract: | A continuous and compact hole‐blocking layer is crucial to prevent photocurrent recombination at the photoanode/electrode interface of high‐performance mesostructure perovskite‐based solar cells. Novel TiO2/ZnO/TiO2 sandwich multi‐layer compact film prepared as hole‐blocking layer for perovskite solar cell. Herein, TiO2, ZnO, and TiO2 layers were successfully deposited by spin‐coating onto FTO glass substrate in sequence. The fill factor and power conversion efficiency of the perovskite solar cell are remarkably improved by the employment of a TiO2/ZnO/TiO2 sandwich compact layer. Perovskite solar cell based on TiO2/ZnO/TiO2 sandwich film has been observed to exhibit maximum incident‐photon‐to‐current conversion efficiency in the visible region (400–780 nm) and reach a power conversion efficiency of 12.8% under AM1.5G illumination. Copyright © 2016 John Wiley & Sons, Ltd. |
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| Keywords: | TiO2/ZnO/TiO2 sandwich film photovoltaic devices perovskite solar cell |
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