低温制备介孔碳对电极构建的染料敏化太阳电池优化研究

以高比表面积的介孔碳为催化层材料通过低温烧结构建出对电极, 着重优化了其组装的染料敏化太阳电池(DSC)的整体结构和性能. 结果表明: 在碳浆料中添加Triton X100能改善碳颗粒之间以及碳催化层与衬底之间的接触界面, 促使DSC的转换效率从4.50%提升到4.82%, 增幅为7.1%. 随TiO₂薄膜厚度增加, DSC的转换效率先急剧增加, 随后趋于缓和, 其变化趋势是染料吸附量与电子传输路径相互竞争的结果. 在电解质中添加磷酸三丁酯能减小电解质电阻, 促使DSC的转换效率从3.59%提升到4.42%, 增幅为23.1%. 优化后, 介孔碳对电极DSC的转换效率达到4.82%.

Optimization of Dye-sensitized Solar Cells Consisting of Low-temperature Fabricated Mesoporous Carbon Counter Electrode

Carbon counter electrode was fabricated using high surface area mesoporous carbon(MC) as catalytic material at low temperature.The integral structure and the photovoltaic performances of dye-sensitized solar cells(DSC) consisting of the obtained carbon counter electrode were emphatically optimized.The results show that both contact interface among MC particles and that between carbon catalytic film and substrate are improved by adding Triton X100 into MC slurry,leading to an increase of 7.1% in the efficiency of DSC.With the increasing thickness of TiO2 film,the efficiency of DSC sharply increases at first and tends to stabilization later on.The change in the efficiency is the result of competition between the adsorption amount of dye and the transmission path of electron in the TiO2 film.The resistance of electrolyte is reduced by mixing tributyl phosphate into electrolyte,resulting in an increase of 23.1% in the efficiency of DSC.The optimum efficiency of DSC employing carbon counter electrode reaches 4.82%.