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- Title
Growth of (100)-orientation-preferred BiI<sub>3</sub> nanoplate films by vapor transport deposition for photovoltaic application.
- Authors
Yuan, Wenbin; Shao, Zhufeng; Wang, Qiushi; Zhong, Min
- Abstract
As one of the bismuth-based halide families, BiI3 has been widely studied and investigated due to its outstanding anisotropic electronic and optical properties, and it is also a building block for the conversion of these organic–inorganic or all-inorganic bismuth-based halides. In this work, a simple vapor transport deposition method is proposed to deposit high-quality BiI3 thin films using BiI3 crystal powder as the evaporation source for the first time. The influence of substrate angles was investigated on the texture coefficient, morphological, and optical properties of the thin films, and the orientation of the BiI3 film can be controlled by adjusting substrate angles. With increasing substrate angles, the BiI3 films are more preferred to grow along the (100) orientation. When the substrate angle is 90°, the BiI3 polycrystalline film is completely transformed into BiI3 nanoplate film. The BiI3 film with (100)-orientation was perpendicular to the substrate, which will be beneficial to charge transport for the reason that charge transport travels easily along (100) orientation. Therefore, BiI3 thin films prepared with different substrate angles were applied to BiI3 solar cells using a superstrate structure with FTO/TiO2/BiI3/CuI/Au, and it was found that the efficiency of the BiI3 solar cells is closely related to the orientation of the BiI3 films influenced by the substrate angles during preparation. Finally, the highest efficiency of BiI3 solar cells (0.43%) is obtained at the substrate angle of 90°. This research opens up a new avenue for controlling the orientation of perovskite thin films in order to improve photovoltaic applications.
- Subjects
VAPOR-plating; SOLAR cell efficiency; THIN films; SOLAR cells
- Publication
Journal of Materials Science: Materials in Electronics, 2022, Vol 33, Issue 25, p20373
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-022-08853-y