A Three‐Step Method for the Deposition of Large Cuboids of Organic–Inorganic Perovskite and Application in Solar Cells |
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| Authors: | Saeed Shahbazi Mahdi Malekshahi Byranvand Dr Fariba Tajabadi Dr Shahrara Afshar Dr Nima Taghavinia |
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| Affiliation: | 1. Chemistry Department, Iran University of Science and Technology, Tehran, Iran;2. School of Chemistry, College of Science, University of Tehran, Tehran, Iran;3. Department of Nanotechnology and Advanced Materials, Materials and Energy Research Center, Karaj, Iran;4. Physics Department and Institute for Nanoscience, and Nanotechnology, Sharif University of Technology, Tehran, Iran |
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| Abstract: | A three‐step method for the deposition of CH3NH3PbI3 perovskite films with a high crystalline structure and large cuboid overlayer morphology is reported. The method includes PbI2 deposition, which is followed by dipping into a solution of C4H9NH3I (BAI) and (BA)2PbI4 perovskite formation. In the final step, the poorly thermodynamically stable (BA)2PbI4 phase converts into the more stable CH3NH3PbI3 perovskite by dipping into a solution of CH3NH3I. The final product is characterized by XRD, SEM, UV/Vis, and photoluminescence analysis methods. The experimental results indicate that the prepared perovskite has cuboids with high crystallinity and large sizes (up to 1 μm), as confirmed by XRD and SEM data. Photovoltaic investigations show that the three‐step method results in higher solar cell efficiency (15 % enhancement in efficiency) with a better reproducibility than the conventional two‐step deposition method. |
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| Keywords: | electrochemistry perovskite phases solar cells synthesis design thin films |
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