A smelting multiple recrystallization strategy and its effects on the morphology,composition,and defects of CsPbBrI_(2)film were investigated.An optimal number(n=2)of recrystallization cycles improved the crystallinit...A smelting multiple recrystallization strategy and its effects on the morphology,composition,and defects of CsPbBrI_(2)film were investigated.An optimal number(n=2)of recrystallization cycles improved the crystallinity and phase purity,minimized the grain boundaries,and optimized the crystal structure,yielding a high-quality perovskite film with significantly reduced defects density.The corresponding photovoltaic devices exhibited a champion efficiency of 16.02%under AM 1.5 G illumination and presented an even higher indoor efficiency of 33.50%under an LED(2956 K,P_(in):334.41𝜇W/cm^(2)).This recrystallization method offers a promising strategy for developing high-performance indoor and outdoor photovoltaics.Direct recrystallization in the cells was also explored to achieve enhanced stability and longer lifetime in humid conditions.展开更多
基金The authors acknowledge financial support from the National Natural Science Foundation of China(Nos.62075148,52073197)the Natural Science Foundation of Jiangsu Province(No.BK20201413).
文摘A smelting multiple recrystallization strategy and its effects on the morphology,composition,and defects of CsPbBrI_(2)film were investigated.An optimal number(n=2)of recrystallization cycles improved the crystallinity and phase purity,minimized the grain boundaries,and optimized the crystal structure,yielding a high-quality perovskite film with significantly reduced defects density.The corresponding photovoltaic devices exhibited a champion efficiency of 16.02%under AM 1.5 G illumination and presented an even higher indoor efficiency of 33.50%under an LED(2956 K,P_(in):334.41𝜇W/cm^(2)).This recrystallization method offers a promising strategy for developing high-performance indoor and outdoor photovoltaics.Direct recrystallization in the cells was also explored to achieve enhanced stability and longer lifetime in humid conditions.
