高溶解性树枝状富勒烯衍生物电子传输材料的合成及其在钙钛矿太阳能电池中的应用

Highly soluble dendritic fullerene derivatives as electron transport material for perovskite solar cells

本文设计并合成了一系列单加成的树枝状C_(60)衍生物作为电子传输材料,其中,材料的合成过程采用无催化剂参与的Diels-Alder[4+2]环加成反应。得到的超支化C_(60)的溶解性得到明显提高,与原始的C_(60)相比,第一代和第二代树枝状C_(60)衍生物(C_(60)-G1和C_(60)-G2)在有机相中的溶解度均提高了5倍以上。此外,理论模拟和实验均表明,树枝状C_(60)衍生物可作为钙钛矿太阳能电池的电子传输层,并同时具有良好的溶液加工性能。在钙钛矿太阳能电池中,以C_(60)-G2作为电子传输层的最大光电转换效率可达14.7%。

A series of shape-persistent polyphenylene dendritic C_(60)derivatives as the electron transport materials were designed and synthesized via a catalyst-free Diels-Alder[4+2]cycloaddition reaction.These increasing hyperbranched scaffolds could effectively enhance the solubility;notably,both first and second generation dendrimers,C_(60)-G1 and C_(60)-G2,demonstrated more than 5 times higher solubilities than pristine C_(60).Furthermore,both simulated and experimental data proved their promising solution-processabilities as electron-transporting layers(ETLs)for perovskite solar cells.As a result,the planar p-i-n structural perovskite solar cell could achieve a maximum power conversion efficiency of 14.7%with C_(60)-G2.