Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University , Suzhou, Jiangsu 215123, China.
Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences , Shanghai 201204, China.
ACS Appl Mater Interfaces. 2017 Apr 19;9(15):13240-13246. doi: 10.1021/acsami.7b02223. Epub 2017 Apr 4.
Effective and stable hole-transporting materials (HTMs) are necessary for obtaining excellent planar perovskite solar cells (PSCs). Herein, we reported a solution-processed composite HTM consisting of a polymer poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) and a small-molecule copper phthalocyanine-3,4',4″,4‴-tetrasulfonated acid tetrasodium salt (TS-CuPc) with optimized doping ratios. The composite HTM is crucial for not only enhancing the hole transport and extraction but also improving the perovskite crystallization. In addition, the composite HTM can weaken the indium tin oxide erosion by reducing the acidity and increasing the dispersibility of the PEDOT:PSS aqueous dispersion via incorporating suitable TS-CuPc. Consequently, a highly efficient device was fabricated with a power conversion efficiency (PCE) of 17.29%. Its short-circuit current (J) is 22.23 mA/cm, and its open-circuit voltage (V) is 1.01 V. Meanwhile, it exhibited a higher fill factor (FF) of 77% and improved cell stability. The developed composite HTM provides a good potential anode interfacial layer for fabricating outstanding PSCs.
有效且稳定的空穴传输材料（HTMs）对于获得优异的平面钙钛矿太阳能电池（PSCs）是必要的。在此，我们报道了一种由聚合物聚（3,4-乙二氧基噻吩）：聚苯乙烯磺酸盐（PEDOT：PSS）和小分子铜酞菁-3,4',4″,4‴-四磺酸钠（TS-CuPc）组成的溶液处理复合 HTM，具有优化的掺杂比。复合 HTM 不仅对于增强空穴传输和提取很重要，而且对于改善钙钛矿结晶也很重要。此外，复合 HTM 可以通过掺入合适的 TS-CuPc 来降低 PEDOT：PSS 水性分散体的酸度并提高其分散性，从而减弱氧化铟锡的侵蚀。因此，制备了一个高效器件，其功率转换效率（PCE）为 17.29%。其短路电流（J）为 22.23 mA/cm，开路电压（V）为 1.01 V。同时，它表现出更高的填充因子（FF）为 77%，并提高了电池稳定性。所开发的复合 HTM 为制备出色的 PSCs 提供了良好的潜在阳极界面层。
