基于ZnO电子传输层的钙钛矿太阳能电池性能

Performance optimization of perovskite solar cells based on ZnO electron transport layer

具有光电转换效率高、制备工艺简单和成本低廉等优势的钙钛矿太阳能电池在近几年发展迅猛,最高光电转换效率已达到22. 7%。在经典钙钛矿太阳能电池中,常以TiO_2作为电子传输层。以CH_3NH_3PbI_3为原料制备钙钛矿吸收层,以纳米结构ZnO作为电子传输层,Spiro-OMeTAD作为空穴传输层,采用磁控溅射镀银制作金属电极,组装成FTO/ZnO/CH_3NH_3PbI_3/Spiro-OMeTAD/Ag的简易结构。实验结果表明:当ZnO旋涂4层(膜厚为1400nm)、退火温度为100℃所制备的ZnO基钙钛矿太阳能电池器件性能最佳,开路电压Voc为0. 97V,短路电流密度(Jsc)为12. 85 mA/cm^2,填充因子FF为0. 49,光电转换效率PCE为6. 11%。

Perovskite solar cells with advantages of high photoelectric conversion efficiency, simple preparation process and low cost have developed rapidly in recent years, with the highest photoelectric conversion efficiency reaching 22.7%. In the classic perovskite solar cells, often with TiO 2 as electron transport layer, this paper takes CH 3NH 3PbI 3 as raw material preparation of perovskite absorption layer, to structure of nanometer ZnO as electron transport layer, Spiro-OMeTAD as hole transport layer, made by magnetron sputtering plating silver metal electrodes, assemble FTO/ZnO/CH 3NH 3PbI 3/Spiro-OMeTAD/Ag simple structure. The experimental results show that the ZnO-based perovskite solar cells fabricated by spin-coating ZnO with 4 layers （1400 nm film thickness）and annealing temperature of 100 C have the best performance. The open-circuit voltage Voc is 0.97 V, the short-circuit current density Jsc is 12.85 mA/cm 2, the filling factor FF is 0.49, and the photoelectric conversion efficiency PCE is 6.11%.