of dye adsorption of TUS-28 was smaller than that of TUS-20. A more effective electron injection reaction is considered to contribute mainly to the efficiency improvement of TUS-28 since the path length of the electron injection from TUS-28 to the conduction band of the TiO2 is shorter than that of TUS-20 due to the absence of the phenyl ring.
合成了一种新型
钌敏化剂((TBA)[Ru(3',4'-二羧基
吡啶)(
NCS)3 ],TBA =四丁基
铵,TUS-28),作为一种改进的用于(TBA)[Ru(4' -(3,4-二羧基苯基)
吡啶(
NCS)3 ](TUS-20)。由于在叔
吡啶配体上不存在苯环,所以在整个可见光区域中,TUS-28的摩尔吸收率小于TUS-20的摩尔吸收率。另一方面,TUS-28的HOMO和LUMO的能级仍然适合于
染料敏化太阳能电池(
DSC)中的有效电子转移反应。TUS-28没有表现出比TiO 2更高的吸附能力即使TUS-28具有邻二羧基,据报道它是一种有效的锚定单元,其表面也像TUS-20一样。ATR-IR测量表明,就像TUS-20一样,TUS-28的两个羧基都与TiO 2表面结合。因此,3',4'-二羧基联
吡啶的4位氢原子和TiO 2表面的OH基之间的空间位阻似乎阻碍了快速吸附,并削弱了TUS-28的结合强度。具有TUS-28的
DSC的转换效率为8