Zou Ding, Yang Fafu, Zhuang Qixin, Zhu Mingguang, Chen Yunxiang, You Guofeng, Lin Zhenghuan, Zhen Hongyu, Ling Qidan
College of Chemistry and Materials Science, Fujian Key Laboratory of Polymer Materials, Fujian Normal University, Fuzhou, 350007, P.R. China.
ChemSusChem. 2019 Mar 21;12(6):1155-1161. doi: 10.1002/cssc.201802421. Epub 2019 Feb 13.
Perylene diimide-based small molecules are widely used as intermediates of liquid crystals, owing to their high planarity and electron mobility. In this study, tetrachloroperylene diimide (TCl-PDI) was used as a small-molecule replacement for TiO as electron-transporting material (ETM) for planar perovskite solar cells (PVSCs). Among hole-transporting materials (HTMs) for PVSCs, poly(3-hexylthiophene) (P3HT) gives the devices the highest stability and reproducibility. Therefore, PVSCs with the structure of indium tin oxide (ITO)/ETM/perovskite/P3HT/MoO /Ag were used to evaluate the performances of new ETMs. A reference device with compact TiO and P3HT gave a reasonable power conversion efficiency (PCE) of 12.78 %, whereas the PVSC with TCl-PDI as ETM gave an enhanced PCE of 14.73 %, which is among the highest reported values for PVSCs with undoped P3HT as the HTM. Moreover, TCl-PDI-based devices displayed higher stability than those based on compact TiO , owing to the superior perovskite quality.
由于具有高平面性和电子迁移率，基于苝二酰亚胺的小分子被广泛用作液晶中间体。在本研究中，四氯苝二酰亚胺（TCl-PDI）被用作平面钙钛矿太阳能电池（PVSC）中作为电子传输材料（ETM）的TiO的小分子替代物。在PVSC的空穴传输材料（HTM）中，聚（3-己基噻吩）（P3HT）赋予器件最高的稳定性和重现性。因此，采用氧化铟锡（ITO）/ETM/钙钛矿/P3HT/MoO/Ag结构的PVSC来评估新型ETM的性能。具有致密TiO和P3HT的参考器件给出了12.78%的合理功率转换效率（PCE），而以TCl-PDI作为ETM的PVSC给出了14.73%的增强PCE，这是未掺杂P3HT作为HTM的PVSC所报道的最高值之一。此外，由于钙钛矿质量优异，基于TCl-PDI的器件比基于致密TiO的器件表现出更高的稳定性。
