Würfel U, Wagner J, Hinsch A
Freiburg Material Research Center, University of Freiburg, Stefan-Meier-Strasse 21, Freiburg 79104, Germany.
J Phys Chem B. 2005 Nov 3;109(43):20444-8. doi: 10.1021/jp0529624.
Dye solar cells have been investigated by charge carrier extraction under short and open circuit conditions and an illumination intensity equivalent to 1 sun (AM 1.5). Under short circuit conditions, a surprisingly high amount of charge carriers stored in the nanoporous TiO2 network has been observed. A theoretical model was developed to describe the charge transport in the nanoporous TiO2 network of a dye solar cell, and the spatial distribution of the electron concentration was calculated. These results were compared with the experimental data of charge carriers stored in the TiO2 network under short and open circuit conditions. We were able to conclude that under short circuit conditions, the electrochemical potential of the electrons in the region far from the electrode is up to 550-570 meV higher than that of the electrons at the front electrode. This internal voltage is the driving force across the nanoporous TiO2 film under short circuit conditions.
通过在短路和开路条件下以及相当于1个太阳（AM 1.5）的光照强度下进行载流子提取，对染料太阳能电池进行了研究。在短路条件下，观察到纳米多孔TiO₂网络中存储了数量惊人的载流子。开发了一个理论模型来描述染料太阳能电池纳米多孔TiO₂网络中的电荷传输，并计算了电子浓度的空间分布。将这些结果与短路和开路条件下TiO₂网络中存储的载流子的实验数据进行了比较。我们能够得出结论，在短路条件下，远离电极区域的电子的电化学势比前电极处的电子的电化学势高550 - 570 meV。这种内部电压是短路条件下跨纳米多孔TiO₂薄膜的驱动力。
