Effect of alkyl chain length on the properties of triphenylamine-based hole transport materials and their performance in perovskite solar cells
作者:Rosinda Fuentes Pineda、Joel Troughton、Miquel Planells、Irene Sanchez-Molina Santos、Farmin Muhith、Gary S. Nichol、Saif Haque、Trystan Watson、Neil Robertson
DOI:10.1039/c7cp07682g
日期:——
hole-transport materials in perovskite solar cells (PSC) studied. Their thermal, optical and electrochemical properties were investigated along with their molecular packing and charge transport properties to analyse the influence of different alkyl chains in the solar cell parameters. The shorter alkyl chain facilitates more compact packing structures which enhanced the hole mobilities and reduced recombination
新系列的二乙炔三苯胺(DATPA)衍生物在对位具有五个不同的烷基链,MeO,EtO,n PrO,i合成并充分表征了PrO和BuO,并研究了它们在钙钛矿太阳能电池(PSC)中作为空穴传输材料的功能。研究了它们的热,光学和电化学性质,以及它们的分子堆积和电荷传输性质,以分析不同烷基链对太阳能电池参数的影响。较短的烷基链有助于更紧密的堆积结构,从而增强了空穴迁移率并减少了重组。这项工作表明具有甲氧基取代基(MeO)的分子表现出最佳的半导体性能,功率转换效率高达5.63%,开路电压(V oc)为0.83 V,光电流密度(J sc)为10.84毫安厘米-2钙钛矿太阳能电池的填充系数为62.3%。当用更长的烷基链取代基取代甲氧基而不改变能级时,电荷迁移率以及PCE降低(例如,BuO-DATPA为3.29%)。半导体分子的烷基链长在实现高性能钙钛矿太阳能电池中起着重要作用。