材料科学
光电子学
钙钛矿(结构)
离子键合
光伏
电容器
电阻抗
晶体管
半导体
数码产品
离子
光伏系统
电压
电气工程
化学
工程类
有机化学
结晶学
作者
Davide Moia,Ilario Gelmetti,Phil Calado,William D. Fisher,Michael Stringer,Onkar S. Game,Yinghong Hu,Pablo Docampo,David G. Lidzey,Emilio Palomares,Jenny Nelson,Piers R. F. Barnes
摘要
Mobile ions in hybrid perovskite semiconductors introduce a new degree of freedom to electronic devices suggesting applications beyond photovoltaics. An intuitive device model describing the interplay between ionic and electronic charge transfer is needed to unlock the full potential of the technology. We describe the perovskite-contact interfaces as transistors which couple ionic charge redistribution to energetic barriers controlling electronic injection and recombination. This reveals an amplification factor between the out of phase electronic current and the ionic current. Our findings suggest a strategy to design thin film electronic components with large, tuneable, capacitor-like and inductor-like characteristics. The resulting simple equivalent circuit model, which we verified with time-dependent drift-diffusion simulations of measured impedance spectra, allows a general description and interpretation of perovskite solar cell behaviour.
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