Serpa Carlos, Schabauer Johann, Piedade Ana P, Monteiro Carlos J P, Pereira Mariette M, Douglas Peter, Burrows Hugh D, Arnaut Luis G
Chemistry Department, University of Coimbra, P3004-535 Coimbra, Portugal.
J Am Chem Soc. 2008 Jul 16;130(28):8876-7. doi: 10.1021/ja801928z. Epub 2008 Jun 18.
Time-resolved photoacoustic calorimetry is used to measure the energy released upon injection of an electron from an electronically excited dye adsorbed to nanocrystalline TiO2 into the conduction band of this material. More energy is released when the environment of the dye is made less polar, because the energy of the dye-oxidized state has a more pronounced solvent dependence than the edge of the conduction band of the TiO2 semiconductor. Such energy dependences should be considered in the design of more efficient dye-sensitized solar cells.
时间分辨光声量热法用于测量当吸附在纳米晶TiO₂上的电子激发态染料向该材料导带注入电子时所释放的能量。当染料环境的极性降低时，会释放出更多能量，这是因为染料氧化态的能量比TiO₂半导体导带边缘具有更显著的溶剂依赖性。在设计更高效的染料敏化太阳能电池时应考虑这种能量依赖性。
