P3HT为空穴传输层的碳基钙钛矿太阳电池

Study on Perovskite Solar Cells with P3HT Hole Transport Layer

碳电极具有成本低、印刷方便、可有效隔离水氧等优点,因此有望利用碳电极材料实现低成本、高稳定性的钙钛矿太阳电池。无空穴传输层的传统碳基钙钛矿太阳电池面临着空穴提取率低、电子逆向传输,钙钛矿和碳电极界面的载流子复合等问题。文章引入聚(3-己基噻吩)(P3HT)作为器件的空穴传输层,使碳基钙钛矿太阳电池ITO/SnO2/MAPbI3/P3HT/Carbon的光伏性能得到了显著改善:器件的光电转化效率从11.16%提高到13.37%。在氮气环境下,连续光照1 000h,太阳电池的光电转化效率可保持初始值的87%,而传统器件在光照500h后,其光电转化效率已下降至初始值的60%。

Carbon electrode has the advantages of low-cost,convenient printing and the ability to isolate water and oxygen.Therefore,it is appealing to use carbon as the electrode material to achieve low-cost and highly stable perovskite solar cells(PSCs).However,conventional carbon-based perovskite solar cells(C-PSCs)without hole transport layers is still facing the problems of low hole extraction rate,electron reverse transfer,and undesired recombination at the perovskite/carbon interface.In this paper,poly(3-hexylthiophene)(P3 HT)is applied as the hole transport layer of the device,thus the photovoltaic performance of solar cells with an architecture of ITO/SnO2/MAPbI3/P3 HT/Carbon is significantly improved,achieving apower conversion efficiency(PCE)of 13.37%,which is 2.21%higher than that of the device without P3 HT.Moreover,in nitrogen environment,the PCE of the device remains 87%of its initial value with continuous illumination for 1 000 h.In contrast,the PCE of the device without P3 HT remains only 60%after illumination for 500 h.