Oriented inorganic perovskite absorbers processed by colloidal-phase fumigation
نویسندگان
چکیده
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 absorption edge, yet the power conversion efficiencies (PCEs) of asfabricated cells can be considerably limited by nonideal quality solution-processed films. Here we demonstrated fumigation strategy on colloidal films using dual-O-donor ethyl acetate (EA). By in-situ monitoring this stage with grazing-incidence wide-angle X-ray scattering technology, reveal that EA would impose ripening barrier inorganic perovskites hence slow down nucleation rate, leading an intermediate state processing high-crystallinity oriented improved photophysical properties. An optimized PCE 16.6% was finally yielded upon wide-bandgap (1.9 eV) absorber.
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ژورنال
عنوان ژورنال: Science China. Materials
سال: 2021
ISSN: ['2095-8226', '2199-4501']
DOI: https://doi.org/10.1007/s40843-021-1653-y