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

摘要:

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1000h,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%。

Abstract:

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) (P3HT) is applied as the hole transport layer of the device, thus the photovoltaic performance of solar cells with an architecture of ITO/SnO₂/MAPbI₃/P3HT/Carbon is significantly improved, achieving a power conversion efficiency (PCE) of 13.37%, which is 2.21% higher than that of the device without P3HT. Moreover, in nitrogen environment, the PCE of the device remains 87% of its initial value with continuous illumination for 1000h. In contrast, the PCE of the device without P3HT remains only 60% after illumination for 500h.