Influence of Alkoxy Chain Length on the Properties of Two‐Dimensionally Expanded Azulene‐Core‐Based Hole‐Transporting Materials for Efficient Perovskite Solar Cells
作者:Minh Anh Truong、Jaehyun Lee、Tomoya Nakamura、Ji‐Youn Seo、Mina Jung、Masashi Ozaki、Ai Shimazaki、Nobutaka Shioya、Takeshi Hasegawa、Yasujiro Murata、Shaik Mohammed Zakeeruddin、Michael Grätzel、Richard Murdey、Atsushi Wakamiya
DOI:10.1002/chem.201806317
日期:2019.5.10
of two‐dimensionally expanded azulene‐core‐based π systems have been synthesized with different alkyl chain lengths in the alkoxy moieties connected to the partially oxygen‐bridged triarylamine skeletons. The thermal, photophysical, and electronic properties of each compound were evaluated to determine the influence of the alkyl chain length on their effectiveness as hole‐transporting materials (HTMs)
已经合成了一系列二维扩展的基于z烯核的π系统,这些烷基系统在与部分氧桥连的三芳基胺骨架连接的烷氧基部分具有不同的烷基链长。评估了每种化合物的热,光物理和电子性质,以确定烷基链长度对其在钙钛矿太阳能电池(PSC)中作为空穴传输材料(HTM)的有效性的影响。所有合成的分子均显示出令人鼓舞的材料特性,包括高溶解度,平坦和无定形膜的形成以及能级与钙钛矿的最佳对准。特别是甲基和n的衍生物侧链中的丁基丁基分别保持高达233和159°C的非晶态稳定性。这样的短烷氧基链也导致改善的电子器件性能。用具有正丁基侧链的HTM制成的PSC装置表现出最佳性能,功率转换效率为18.9%,与基于spiro-OMeTAD的PSC(spiro-OMeTAD = 2,2',7, 7'-四[[ N,N-双(对-甲氧基苯基)氨基] -9,9'-螺二芴)。