Yu Wei, Yang Qing, Zhang Jinhui, Tu Dandan, Wang Xuchao, Liu Xuan, Li Gang, Guo Xin, Li Can
State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics , Chinese Academy of Sciences , Dalian 116023 , China.
Department of Electronic and Information Engineering , The Hong Kong Polytechnic University , Hung Hom, Kowloon , Hong Kong SAR , China.
ACS Appl Mater Interfaces. 2019 Aug 21;11(33):30065-30071. doi: 10.1021/acsami.9b06933. Epub 2019 Aug 7.
Methoxydiphenylamine-substituted carbazole (MODPACz) is widely used to construct hole-transporting materials (HTMs) for perovskite solar cells (PSCs), whose performances rely highly on the linking way of the MODPACz units and the simplicity of the π-bridge. In this paper, we report a new HTM, Ph-2MODPACz, using one of the simplest π-bridges -phenylene to link the MODPACz units. The structural feature endows Ph-2MODPACz with high hole mobility and conductivity, efficient hole extraction ability, and good film-forming property. MAPbI-based PSCs using doped and undoped Ph-2MODPACz as the HTM offer efficiencies of ∼20% and 16.07%, respectively; both are better than those of the devices with spiro-OMeTAD as the HTM. The device stability of Ph-2MODPACz-based PSCs is also greatly enhanced. This work demonstrates that the simplest -phenylene bridge for linking MODPACz can derive a promising HTM with a high device performance, providing a distinctive pathway to develop new HTMs.
甲氧基二苯胺取代咔唑（MODPACz）被广泛用于构建钙钛矿太阳能电池（PSC）的空穴传输材料（HTM），其性能高度依赖于MODPACz单元的连接方式以及π桥的简单性。在本文中，我们报道了一种新型HTM，即Ph-2MODPACz，它使用最简单的π桥之一——亚苯基来连接MODPACz单元。这种结构特征赋予了Ph-2MODPACz高的空穴迁移率和电导率、高效的空穴提取能力以及良好的成膜性能。以掺杂和未掺杂的Ph-2MODPACz作为HTM的基于MAPbI的PSC的效率分别约为20%和16.07%；两者均优于以螺环-OMeTAD作为HTM的器件。基于Ph-2MODPACz的PSC的器件稳定性也得到了极大提高。这项工作表明，用于连接MODPACz的最简单的亚苯基桥能够衍生出具有高器件性能的有前景的HTM，为开发新型HTM提供了一条独特的途径。
