Bottom-Up Quasi-Epitaxial Growth of Hybrid Perovskite from Solution Process-Achieving High-Efficiency Solar Cells via Template-Guided Crystallization
| Autor: | Zhiliang Chen, Wei Yu, Jiaming Huang, Yaokang Zhang, Zhiwei Ren, Zijian Zheng, Minchao Qin, Kuan Liu, Qiong Liang, Gang Li, Hengkai Zhang, Hrisheekesh Thachoth Chandran, Patrick W. K. Fong, Xinhui Lu |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
business.industry Annealing (metallurgy) Mechanical Engineering Energy conversion efficiency 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Epitaxy 01 natural sciences 0104 chemical sciences law.invention Crystallinity Mechanics of Materials law Optoelectronics General Materials Science Thin film Crystallization 0210 nano-technology business Solution process Perovskite (structure) |
| Zdroj: | Advanced materials (Deerfield Beach, Fla.). 33(22) |
| ISSN: | 1521-4095 |
| Popis: | Epitaxial growth gives the highest-quality crystalline semiconductor thin films for optoelectronic devices. Here, a universal solution-processed bottom-up quasi-epitaxial growth of highly oriented α-formamidinium lead triiodide (α-FAPbI3 ) perovskite film via a two-step method is reported, in which the crystal orientation of α-FAPbI3 film is precisely controlled through the synergetic effect of methylammonium chloride and the large-organic cation butylammonium bromide. In situ GIWAXS visualizes the BA-related intermediate phase formation at the bottom of film, which serves as a guiding template for the bottom-up quasi-epitaxial growth in the subsequent annealing process. The template-guided epitaxially grown BAFAMA perovskite film exhibits increased crystallinity, preferred crystallographic orientation, and reduced defects. Moreover, the BAFAMA perovskite solar cells demonstrate decent stability, maintaining 95% of their initial power conversion efficiency after 2600 h ambient storage, and 4-time operation condition lifetime enhancement. |
| Databáze: | OpenAIRE |
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