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Enhanced electron transport induced by a ferroelectric field in efficient halide perovskite solar cells
Solar Energy Materials and Solar Cells ( IF 6.9 ) Pub Date : 2020-03-01 , DOI: 10.1016/j.solmat.2019.110318
Hamaneh Zarenezhad , Masoud Askari , Mohammad Halali , Navid Solati , Timucin Balkan , Sarp Kaya

Abstract Perovskite solar cells have been appearing as a superior photovoltaic device owing to their high photovoltaic performance and low cost of fabrication. The formation of a compact and uniform perovskite layer with large crystal size is a significant factor to get the best device performance. In this work, polyvinylidene difluoride (PVDF) was used as a ferroelectric polymer additive to fabricate high-performance mesoporous CH3NH3PbI3-xClx mixed-halide perovskite solar cells in a sequential deposition method. Power conversion efficiency has been enhanced from 10.4 to 16.51% in an ambient atmosphere in the presence of an optimized amount of PVDF assuring continuous and smooth layers with large grain size. Besides morphological improvements, this progress in the photovoltaic performance is attributed to the dipole field exerted by PVDF that leads to enhanced charge separation. Further improvements in efficiency (18.60%) have been achieved by directing the dipoles under an external field.

中文翻译:

在高效卤化物钙钛矿太阳能电池中由铁电场诱导的增强电子传输

摘要 钙钛矿太阳能电池由于其高光伏性能和低制造成本而成为一种优越的光伏器件。形成具有大晶体尺寸的致密且均匀的钙钛矿层是获得最佳器件性能的重要因素。在这项工作中,聚偏二氟乙烯(PVDF)被用作铁电聚合物添加剂,以顺序沉积方法制造高性能介孔 CH3NH3PbI3-xClx 混合卤化物钙钛矿太阳能电池。在优化数量的 PVDF 存在下,在环境气氛中的功率转换效率从 10.4% 提高到 16.51%,确保连续和光滑的大晶粒层。除了形态上的改进,光伏性能的这种进步归因于 PVDF 施加的偶极场,从而增强了电荷分离。通过在外场下引导偶极子,已经实现了效率的进一步提高(18.60%)。
更新日期:2020-03-01
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