Oriented inorganic perovskite absorbers processed by colloidal-phase fumigation
| Autor: | Yiheng Shi, Xiaolong Li, Chen Lin, Ziren Zhou, Jin Xie, Hua Gui Yang, Yu Hou, Shuang Yang, Zeqing Lin, Hong Wei Qiao, Mengjiong Chen, Bing Ge, Yi Zheng Jin |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
business.industry Scattering Nucleation Ethyl acetate 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Colloid Absorption edge chemistry Chemical engineering Photovoltaics Phase (matter) General Materials Science 0210 nano-technology business Perovskite (structure) |
| Zdroj: | Science China Materials. 64:2421-2429 |
| ISSN: | 2199-4501 2095-8226 |
| DOI: | 10.1007/s40843-021-1653-y |
| Popis: | Inorganic perovskite absorbers are promising candidates for next-generation photovoltaics due to their good thermal and light stabilities. Halide-mixed CsPbIxBr3−x reach a compromise between its structural tolerance and absorption edge, yet the power conversion efficiencies (PCEs) of the asfabricated cells can be considerably limited by the nonideal quality of solution-processed films. Here we demonstrated a fumigation strategy on colloidal perovskite films using dual-O-donor ethyl acetate (EA). By in-situ monitoring this stage with grazing-incidence wide-angle X-ray scattering technology, we reveal that EA fumigation would impose ripening barrier on colloidal inorganic perovskites and hence slow down the nucleation rate, leading to an intermediate state for processing high-crystallinity and oriented perovskite films with improved photophysical properties. An optimized PCE of 16.6% was finally yielded upon wide-bandgap (1.9 eV) perovskite absorber. |
| Databáze: | OpenAIRE |
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