Ge基钙钛矿太阳能电池的数值模拟研究

Numerical Simulation Study of Ge-based Perovskite Solar Cells

以SCAPS太阳能电池模拟软件设计了结构为Glass substrate/FTO/ZnO/CH_(3)NH_(3)GeI_(3)/Cu_(2)O/Au的Ge基钙钛矿太阳能电池。探讨了吸收层的厚度和缺陷态密度、电子传输层的电子亲和势、载流子传输层和吸收层的界面缺陷态密度对电池性能的影响。由仿真结果知,当CH_(3)NH_(3)GeI_(3)厚度为500 nm、缺陷态密度为10^(18)cm^(-3)、电子传输层的电子亲和势为3.7 eV、电子传输层和吸收层界面及吸收层和空穴传输层界面的缺陷态密度分别为10^(12)cm^(-3)和10^(18)cm^(-3)时,电池性能得到了一定提升,输出特性为:开路电压为1.12 V,短路电流密度为15.00 mA·cm^(-2),填充因子为89.52%,效率为15.93%。

Ge-based perovskite solar cell with structure of Glass substrate/FTO/ZnO/CH_(3)NH_(3)GeI_(3)/Cu_(2)O/Au was designed by solar cell simulation software SCAPS.The thickness and defect state density of the absorber layer,the electron affinity of the electron transport layer,the interface defect state densities of the carrier transport layer and absorber layer were discussed.From the simulation results,when the thicknesses and defect state density of absorber layer are 500 nm and10^(18) cm^(-3),electron affinity of the electron transport layer is 3.7 eV,the interface defect state density between the electron transport layer and absorber layer is 10^(12) cm^(-3),and the interface defect state density between absorber layer and the hole transport layer is 10^(18) cm^(-3),the cell performance has been improved.The output characteristics are:open circuit voltage is 1.12 V,short circuit current density is 15.00 mA·cm^(-2),fill factor is 89.52%,power conversion efficiency is 15.93%.