共吸附剂修饰TiO2薄膜电极

摘要

A co-adsorbents modified nanocrystalline TiO2 thin-film electrode was studied for application in dye-sensitized solar cells. The effects of di(3,3-dimethylbutyl) phosphoric acid and chenodeoxycholic acid modification on the flat band potential and the passivation of the TiO2 thin-film electrode were investigated by determining the flat-band potential and undertaking electrochemical impedance spectroscopy (EIS). The results suggest that di(3,3-dimethylbutyl) phosphoric acid is more effective in passivating the TiO2 film surface and in shifting the flat-band potential negatively. For the dye-sensitized solar cells, EIS measurements indicate that the use of di(3,3-dimethylbutyl) phosphoric acid as a co-adsorbent may be more effective in increasing the electronic lifetime and the open-circuit voltage of the device than chenodeoxycholic acid.%共吸附剂修饰纳晶TiO2薄膜电极是目前染料敏化太阳电池研究的一个热点.本文通过平带电势和电化学阻抗研究了二(3,3-二甲基丁基)次膦酸和鹅脱氧胆酸两种共吸附剂修饰对TiO2薄膜电极的平带电势和电极表面钝化能力的影响及其在染料敏化太阳电池中的应用.结果表明,二(3,3-二甲基丁基)次膦酸能更有效地钝化TiO2薄膜表面,并使TiO2薄膜平带电势负移.电化学阻抗谱测试结果表明,在染料敏化太阳电池中,相对于鹅脱氧胆酸,二(3,3-二甲基丁基)次膦酸能更显著地提高器件的电子寿命和开路电压.