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• W3022960219 endingPage "2000162" @default.
• W3022960219 startingPage "2000162" @default.
• W3022960219 abstract "Both phase and morphology of perovskite films are very important for high-performance optoelectronic devices. Although a two-step method based on CsBr ethylene glycol monomethylether (EGME) solution can prepare pure-phase CsPbBr3 films, they have a poor morphology due to excessive Ostwald ripening. Herein, a bi-solvent engineering strategy is demonstrated to simultaneously optimize phase and morphology of CsPbBr3 films in a two-step solution method, which uses the bi-solvents of EGME and isopropanol (IPA) instead of EGME for CsBr solution at the second step. Optimizing the volume ratio of bi-solvents and immersion time can control the Ostwald ripening effectively and result in pure-phase, compact, and smooth CsPbBr3 films. Finally, the prepared films are applied to perovskite solar cells (PSCs) with a structure of fluorine-doped tin oxide (FTO)/compact TiO2 (c-TiO2)/CsPbBr3/carbon. In comparison with EGME, the champion power conversion efficiency (PCE) of devices from EGME/IPA bi-solvents increases from 3.57% to 7.29% owing mainly to higher coverage, smoother surface, and lower trap density of CsPbBr3 films from EGME/IPA bi-solvents. This work provides a simple and efficient method for the preparation of high-quality CsPbBr3 films." @default.
• W3022960219 created "2020-05-13" @default.
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• W3022960219 date "2020-05-14" @default.
• W3022960219 modified "2023-10-16" @default.
• W3022960219 title "Simultaneous Optimization of Phase and Morphology of CsPbBr ₃ Films via Controllable Ostwald Ripening by Ethylene Glycol Monomethylether/Isopropanol Bi‐Solvent Engineering" @default.
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• W3022960219 doi "https://doi.org/10.1002/adem.202000162" @default.
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