Effects of interfacial chemical states on the performance of perovskite solar cells
Effects of interfacial chemical states on the performance of perovskite solar cells
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DOI：
10.1039/c5ta08098c
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发表时间：
2016-03
影响因子：
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通讯作者：
Teng Ma;Daisuke Tadaki;M. Sakuraba;S. Sato;A. Hirano-Iwata;M. Niwano
中科院分区：
文献类型：
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作者：
Teng Ma;Daisuke Tadaki;M. Sakuraba;S. Sato;A. Hirano-Iwata;M. Niwano
我们发现，广泛使用的溶剂分子，N，N-二甲基甲酰胺（DMF），很容易吸附在钙钛矿太阳能电池（PSC）的TiO 2电极的表面上，并且吸附的DMF分子保持完整的TiO 2表面上，即使在钙钛矿层的长期退火后，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-C61-丁酸（PCBA）修饰TiO 2电极表面，DMF的吸收被显著抑制。我们还认为，高电子亲和力的PCBA增强了钙钛矿/TiO 2界面的电荷传输，降低了接触电阻。
We showed that the widely used solvent molecule, N,N-dimethyl-formamide (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-C61-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.