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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Effects of interfacial chemical states on the performance of perovskite solar cells
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Effects of interfacial chemical states on the performance of perovskite solar cells

机译:界面化学态对钙钛矿太阳能电池性能的影响

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摘要

We showed that the widely used solvent molecule, N,N-dimethylformamide (DMF), readily adsorbs on the surface of TiO2 electrodes of perovskite solar cells (PSCs), and that the adsorbed DMF molecules remain intact on the TiO2 surface even after long-term annealing of the perovskite layer, resulting in an increase in the contact resistance of the PSCs. We found that the absorption of DMF is significantly suppressed by modifying the TiO2 electrode surface with a fullerene derivative, [6,6]-phenyl-C-61-butyric acid (PCBA). We also suggested that the high electron affinity of PCBA enhances the charge transportation at the perovskite/TiO2 interface and reduces the contact resistance.
机译:我们发现,广泛使用的溶剂分子N,N-二甲基甲酰胺(DMF)容易吸附在钙钛矿太阳能电池(PSC)的TiO2电极表面上,即使经过很长时间的吸附,被吸附的DMF分子仍能保持完整。钙钛矿层的长期退火,导致PSC的接触电阻增加。我们发现,通过用富勒烯衍生物[6,6]-苯基-C-61-丁酸(PCBA)修饰TiO2电极表面,可显着抑制DMF的吸收。我们还建议,PCBA的高电子亲和力可增强钙钛矿/ TiO2界面处的电荷传输并降低接触电阻。

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