Highly Selective and Scalable Fullerene-Cation-Mediated Synthesis Accessing Cyclo[60]fullerenes with Five-Membered Carbon Ring and Their Application to Perovskite Solar Cells
作者:Hao-Sheng Lin、Il Jeon、Yingqian Chen、Xiao-Yu Yang、Takafumi Nakagawa、Shigeo Maruyama、Sergei Manzhos、Yutaka Matsuo
DOI:10.1021/acs.chemmater.9b02468
日期:2019.10.22
is showcased. This method utilizes aryl[60]fullerene cations, ArC60+, as intermediates, which are generated in situ by heating the aryl[60]fullerenyl dimers in the presence of CuBr2. In addition, five-membered carbon ring cyclo[60]fullerenes display excellent device applicability when they are used in perovskite solar cells as over-coating layers of electron-transporting layers. A power conversion
环[60]富勒烯由于其对有机分子的高电子亲和力和迁移性而被广泛用于包括光伏器件在内的许多应用中。但是,它们的合成仅限于某些产率低的衍生物。在这项工作中,展示了一种富勒烯阳离子介导的合成方法,该方法以高达93%的高收率获得了新型的五元碳环环[60]富勒烯。该方法利用芳基[60]富勒烯阳离子ArC 60 +作为中间体,通过在CuBr 2存在下加热芳基[60]富勒烯二聚体就地生成。此外,五元碳环环[60]富勒烯在钙钛矿太阳能电池中用作电子传输层的外涂层时,显示出极好的器件适用性。由于有利的能量排列,优化的基板设计以及五元碳环富勒烯的电化学稳定性,功率转换效率达到了20.7%。