材料科学
钙钛矿(结构)
载流子
离子键合
结晶
电子迁移率
离子液体
散射
光电子学
化学工程
化学物理
离子
光学
催化作用
有机化学
化学
物理
工程类
作者
Yuqin Zou,Johanna Eichhorn,Sebastian Rieger,Yiting Zheng,Shuai Yuan,Lukas Wolz,Lukas V. Spanier,Julian E. Heger,Shanshan Yin,Christopher R. Everett,Linjie Dai,Matthias Schwartzkopf,Cheng Mu,Stephan V. Roth,Ian Sharp,Chun chao Chen,Jochen Feldmann,Samuel D. Stranks,Peter Müller‐Buschbaum
出处
期刊:Nano Energy
[Elsevier]
日期:2023-07-01
卷期号:112: 108449-108449
被引量:8
标识
DOI:10.1016/j.nanoen.2023.108449
摘要
The crystallization behavior of perovskite films has a profound influence on the resulting defect densities, charge carrier dynamics and photovoltaic performance. Herein, we introduce ionic liquids into the perovskite component to tailor the crystal growth of perovskite films from a disordered to a preferential corner-up orientation and accordingly increase the charge carrier mobility to accelerate electron transport and extraction. Using time-resolved measurements, we probe the charge carrier generation, transport and recombination behavior in these films and related devices. We find the ionic liquid-containing samples exhibit lower defects, faster charge carrier transport and suppressed non-radiative recombination, contributing to higher efficiency and fill factor. Via operando grazing-incidence small- and wide-angle X-ray scattering measurements, we observe a light-induced lattice compression and grain fragmentation in the control devices, whereas the ionic liquid-containing devices exhibit a slight light-induced crystal reconstitution and stronger tolerance against illumination. Under ambient conditions, the non-encapsulated device with the pyrrolidinium-based ionic compound (Pyr14BF4) maintains 97% of its initial efficiency after 4368 h.
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