Improved Reproducibility and Intercalation Control of Efficient Planar Inorganic Perovskite Solar Cells by Simple Alternate Vacuum Deposition of PbI2 and CsI
| Autor: | Takayuki Kuwabara, Md. Shahiduzzaman, Kohshin Takahashi, Tetsuya Taima, Teresa S. Ripolles, Shuzi Hayase, Kohei Yamamoto, Makoto Karakawa, Kyosuke Yonezawa |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
General Chemical Engineering Inorganic chemistry Intercalation (chemistry) chemistry.chemical_element 02 engineering and technology 010402 general chemistry 01 natural sciences Article lcsh:Chemistry Vacuum deposition Deposition (phase transition) Thin film Perovskite (structure) business.industry Energy conversion efficiency Heterojunction General Chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences lcsh:QD1-999 chemistry Caesium Optoelectronics 0210 nano-technology business |
| Zdroj: | ACS Omega, Vol 2, Iss 8, Pp 4464-4469 (2017) ACS Omega |
| ISSN: | 2470-1343 |
| DOI: | 10.1021/acsomega.7b00814 |
| Popis: | Vacuum deposition is a simple and controllable approach that aims to form higher-quality perovskite films compared with those formed using solution-based deposition processes. Herein, we demonstrate a novel method to promote the intercalation control of inorganic cesium lead iodide (CsPbI3) perovskite thin films via alternate vacuum deposition. We also investigated the effect of layer-by-layer deposition of PbI2/CsI to fabricate efficient planar heterojunction CsPbI3 thin films and solar cells. This procedure is comparatively simple when compared with commonly used coevaporation techniques; further, precise intercalation control of the CsPbI3 thin films can be achieved by increasing the number of layers in the layer-by-layer deposition of PbI2/CsI. The best control and the highest reproducibility were achieved for the deposition of four double layers owing to the precise intercalation control during the deposition of the CsPbI3 thin film. A power conversion efficiency of 6.79% was obtained via alternating vacuum deposition of two double layers with a short-circuit current density (Jsc) of 12.06 mA/cm2, an open-circuit voltage (Voc) of 0.79 V, and a fill factor (FF) of 0.72. Our results suggest a route for inorganic precursors to be used for efficient perovskite solar cells via alternating vacuum deposition. |
| Databáze: | OpenAIRE |
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