Enhanced Open-Circuit Voltage in Perovskite Solar Cells with Open-Cage [60]Fullerene Derivatives as Electron-Transporting Materials
Enhanced Open-Circuit Voltage in Perovskite Solar Cells with Open-Cage [60]Fullerene Derivatives as Electron-Transporting Materials
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DOI：
10.3390/ma12081314
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发表时间：
2019-04-02
期刊：
影响因子：
3.4
通讯作者：
Echegoyen, Luis
中科院分区：
文献类型：
--
作者：
Castro, Edison;Artigas, Albert;Echegoyen, Luis
报道了开笼[60]富勒烯衍生物作为电子传输材料（ETM）在具有倒置平面（p-i-n）结构的钙钛矿太阳能电池（PSC）中的合成、表征和掺入。对开笼富勒烯 2a-c 进行光学和电化学表征后，制备了具有氧化铟锡 (ITO)/聚(3,4-乙烯二氧噻吩)-聚苯乙烯磺酸盐 (PEDOT:PSS)/钙钛矿/富勒烯/Ag 结构的 p-i-n PSC。与基于苯基-C-61-丁酸甲酯 (PC61BM) 的参考电池相比，从 2a-b 获得的器件表现出具有竞争力的功率转换效率 (PCE) 和改进的开路电压 (V-oc) 值 (>1.0 V)。这些结果通过以下方面合理化：a）开笼富勒烯相对于其他富勒烯具有更高的钝化能力，b）2a-b的最高占据分子轨道/最低未占据分子轨道（HOMO/LUMO）能级与钙钛矿导带之间良好的重叠。
The synthesis, characterization, and incorporation of open-cage [60]fullerene derivatives as electron-transporting materials (ETMs) in perovskite solar cells (PSCs) with an inverted planar (p-i-n) structure is reported. Following optical and electrochemical characterization of the open-cage fullerenes 2a-c, p-i-n PSCs with a indium tin oxide (ITO)/poly(3,4-ethylenedioxythiophene)-polystyrene sulfonate (PEDOT:PSS)/perovskite/fullerene/Ag structure were prepared. The devices obtained from 2a-b exhibit competitive power conversion efficiencies (PCEs) and improved open-circuit voltage (V-oc) values (>1.0 V) in comparison to a reference cell based on phenyl-C-61-butyric-acid methyl-ester (PC61BM). These results are rationalized in terms of a) the higher passivation ability of the open-cage fullerenes with respect to the other fullerenes, and b) a good overlap between the highest occupied molecular orbital/lowest unoccupied molecular orbital (HOMO/LUMO) levels of 2a-b and the conduction band of the perovskite.