以Z907为染料,以二甲基亚磷酸(Dimethylphosphinic acid,DMOP)为共吸附剂,制备了氧化钛基纳米晶染料敏化太阳能电池.红外光谱分析证实了DMOP可以很好地吸附在氧化钛的表面.光电性能测试研究表明,DMOP修饰器件的光电转换效率提高了10%.瞬态光电压研究结果显示DMOP很好地降低了氧化钛表面的化学电容,提高了氧化钛导带边缘,从而提高了电池的整体效率.DMOP的共吸附可以提高染料敏化太阳能电池的长期稳定性,有着重要的应用前景.
Dye-sensitized solar cells (DSCs) based on nanocrystalline TiO_2 films were fabricated with an amphiphilic ruthenium sensitizer NaRu (2,2'-bipyridine-4-carboxylic acid-4'-carboxylate) (4,4'-dinonyl-2,2'-bipyridine)-(NCS)2, named as Z907, and dimethylphosphinic (DMOP) acid as coadsorbent. ATR-FTIR result showed that DMOP binds strongly to the TiO_2 surface with Z907. Photovoltaic measurements proved that DMOP can improve the efficiency of DSC by 10%. Transient spectra analysis revealed that DMOP can decrease the chemical capacitance of TiO_2 film and shift the conduction band-edge more negatively. Moreover, DMOP can improve the long term stability of DSC, which is promising for the application of DSCs.
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