The Function of TiO2 with Respect to Sensitizer Stability in Nanocrystalline Dye Solar Cells
The Function of TiO2 with Respect to Sensitizer Stability in Nanocrystalline Dye Solar Cells
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TiO2 在纳米晶染料太阳能电池中对敏化剂稳定性的作用
DOI：
10.1155/2008/814951
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发表时间：
2008
影响因子：
3.2
通讯作者：
H. Tributsch
中科院分区：
文献类型：
--
作者：
A. Barkschat;T. Moehl;B. Macht;H. Tributsch
在长达3600小时的时间段内，在操作标准化染料敏化电池中，测试了特征性不同组成的染料的长期稳定性。选择性太阳照射，使用分级过滤器，和光电流成像显示，降解与通过的光电流密度有关。光电化学降解观察与所有敏化剂的研究。与纳米结构TiO 2相比，纳米结构ZnO的感光效率较低，并且感光剂的光稳定性较差。最好的性能被确认为顺式RuII（dcbpyH 2）2（NCS）2的TiO 2。然而，在其他相同条件下，它在ZnO上的稳定性低7-10倍。稳定性有利于羧酸锚定和金属中心的电子转移。在TiO 2的存在下，通过在氧化的Ru染料和背键界面Ti 3
Dyes of characteristically different composition have been tested with respect to long-term stability in operating standardized dye sensitized cells during a time period of up to 3600 hours. Selective solar illumination, the use of graded filters, and imaging of photocurrents revealed that degradation is linked to the density of photocurrent passed. Photoelectrochemical degradation was observed with all sensitizers investigated. Sensitization was less efficient and sensitizers were less photostable with nanostructured ZnO compared to nanostructured TiO2. The best performance was confirmed for cis-RuII(dcbpyH2)2(NCS)2 on TiO2. However, it was 7–10 times less stable under other identical conditions on ZnO. Stability is favored by carboxylate anchoring and metal-centred electron transfer. In presence of TiO2, it is enhanced by formation of a stabilizing charge-transfer complex between oxidized Ru dye and back-bonding interfacial Ti3