Mg(OOCCH(3))(2) as an electrolyte additive for quasi-solid dye-sensitized solar cells: with the purpose of enhancing both the photovoltage and photocurrent by modifying the TiO(2)/dye/electrolyte interfaces.
Mg(OOCCH(3))(2) as an electrolyte additive for quasi-solid dye-sensitized solar cells: with the purpose of enhancing both the photovoltage and photocurrent by modifying the TiO(2)/dye/electrolyte interfaces.
复制标题
DOI：
10.1039/c004372a
复制
发表时间：
2010-11
期刊：
影响因子：
--
通讯作者：
Yifeng Zhu;Yantao Shi;Liduo Wang;R. Gao;Beibei Ma;Y. Geng;Y. Qiu
中科院分区：
文献类型：
--
作者：
Yifeng Zhu;Yantao Shi;Liduo Wang;R. Gao;Beibei Ma;Y. Geng;Y. Qiu
研究了在聚合物凝胶电解液中引入Mg(OOCCH(3))(2)作为添加剂后，准固体染料敏化太阳能电池的界面修饰效应和光伏性能。电化学阻抗谱表明，在聚合物凝胶电解液中加入Mg(OOCCH(3))(2)可以有效地延缓二氧化钛/电解液界面的电荷复合。电解液中的Mg(OOCCH(3))(2)也可以通过修饰染料分子来提高入射光电子转换效率。这分别是由于在TiO(2)/电解液界面形成势垒层和促进了染料/TiO(2)界面的电荷注入而提高了光电压和光电流。光伏测试表明，经过优化的Mg(OOCCH(3))(2)加入量后，在100 mW cm(-2)下，转换效率从4.05%提高到4.96%。
The interface modification effect within quasi-solid dye-sensitized solar cells and the photovoltaic performance were investigated after the introduction of Mg(OOCCH(3))(2) as an additive into a polymer gel electrolyte. Electrochemical impedance spectroscopy showed that the addition of Mg(OOCCH(3))(2) into the polymer gel electrolyte can efficiently retard charge recombination at the TiO(2)/electrolyte interface. Mg(OOCCH(3))(2) in the electrolyte can also contribute to the enhancement of the incident photon-to-electron conversion efficiency by modifying the dye molecules. This results in an improvement in the photovoltage and photocurrent due to a barrier layer at the TiO(2)/electrolyte interface and the promotion of charge injection at the dye/TiO(2) interface, respectively. Photovoltaic measurements reveal that a conversion efficiency enhancement from 4.05% to 4.96% under 100 mW cm(-2) is obtained after the amount of Mg(OOCCH(3))(2) added was optimized.