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A New Method for Fitting Current-Voltage Curves of Planar Heterojunction Perovskite Solar Cells
Nano-Micro Letters ( IF 26.6 ) Pub Date : 2017-09-11 , DOI: 10.1007/s40820-017-0159-z
Peizhe Liao , Xiaojuan Zhao , Guolong Li , Yan Shen , Mingkui Wang

Herein we propose a new equivalent circuit including double heterojunctions in series to simulate the current-voltage characteristic of P-I-N planar structure perovskite solar cells. This new method can theoretically solve the dilemma of the parameter diode ideal factor being larger than 2 from an ideal single heterojunction equivalent circuit, which usually is in the range from 1 to 2. The diode ideal factor reflects PN junction quality, which influences the recombination at electron transport layer/perovskite and perovskite/hole transport layer interface. Based on the double PN junction equivalent circuit, we can also simulate the dark current-voltage curve for analyzing recombination current (Shockley-Read-Hall recombination) and diffusion current (including direct recombination), and thus carrier recombination and transportation characteristics. This new model offers an efficacious and simple method to investigate interfaces condition, film quality of perovskite absorbing layer and performance of transport layer, helping us further improve the device efficiency and analyze the working mechanism.



中文翻译:

平面异质结钙钛矿太阳能电池电流-电压曲线拟合的新方法

本文中,我们提出了一种新的等效电路,该电路包括串联的双异质结,以模拟PIN平面结构钙钛矿太阳能电池的电流-电压特性。从理论上讲,这种新方法可以解决参数二极管理想因数与理想单异质结等效电路(通常在1到2范围内)之间大于2的难题。二极管理想因数反映了PN结质量,从而影响了重组在电子传输层/钙钛矿和钙钛矿/空穴传输层的界面处。基于双PN结等效电路,我们还可以模拟暗电流-电压曲线,以分析重组电流(Shockley-Read-Hall重组)和扩散电流(包括直接重组),从而实现了载流子的重组和运输特性。该新模型为研究界面条件,钙钛矿吸收层的膜质量和传输层的性能提供了一种有效而简单的方法,有助于我们进一步提高器件效率并分析其工作机理。

更新日期:2017-11-10
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