Department of Chemistry and Biochemistry , University of Texas at El Paso , 500 West University Avenue , El Paso , Texas 79968 , United States.
Department of Chemistry , University of Pittsburgh , Pittsburgh , Pennsylvania 15260 , United States.
ACS Appl Mater Interfaces. 2019 Sep 18;11(37):34408-34415. doi: 10.1021/acsami.9b09018. Epub 2019 Jul 31.
The synthesis, characterization, and incorporation of phenyl-C-butyric acid methyl ester (PCBM)-like derivatives as electron transporting materials (ETMs) in inverted perovskite solar cells (PSCs) are reported. These compounds have the same structure except for the ester substituent, which was varied from methyl to phenyl to thienyl and to pyridyl. The three latter derivatives performed better than PCBM in PSCs, mainly attributed to the specific interactions of the fullerenes with the perovskite layer, as evidenced by X-ray photoelectron spectroscopy (XPS) and steady-state and time-resolved photoluminescence (SS- and TRPL) measurements. The experimental results were fully supported by density functional theory (DFT) calculations, which showed that the strongest interactions were exhibited by the compound possessing the pyridyl substituent.
本文报道了苯丁酸甲酯（PCBM）类似衍生物作为电子传输材料（ETM）在倒置钙钛矿太阳能电池（PSC）中的合成、表征和掺入。这些化合物的结构相同，除了酯取代基不同，分别为甲基、苯基、噻吩基和吡啶基。后三种衍生物在 PSCs 中的性能优于 PCBM，主要归因于富勒烯与钙钛矿层的特殊相互作用，这一点通过 X 射线光电子能谱（XPS）和稳态和时间分辨光致发光（SS-和 TRPL）测量得到了证实。实验结果得到了密度泛函理论（DFT）计算的充分支持，表明具有吡啶取代基的化合物表现出最强的相互作用。
