Effect of Extended Conjugation of N-Heterocyclic Carbene-Based Sensitizers on the Performance of Dye-Sensitized Solar Cells
作者:Suri Babu Akula、Huei-Siou Chen、Chaochin Su、Bo-Ren Chen、Jiunn-Jie Chiou、Chia-Hsuan Shieh、Ya-Fen Lin、Wen-Ren Li
DOI:10.1021/acs.inorgchem.7b01714
日期:2017.11.6
four ruthenium complexes (CI101, CBTR, CB111, and CB108) having various N-heterocyclic carbene ancillary ligands, pyridine-imidazole, -benzimidazole, -dithienobenzimidazole, and -phenanthroimidazole, respectively. These complexes were designed to investigate the effect of extended conjugation ordained from ring fusion on the power conversion efficiencies of the solar cells. The device sensitized by CB108
我们报告了四个钌配合物(CI101,CBTR,CB111和CB108)的合成,表征和光电性质,这些配合物分别具有各种N-杂环卡宾辅助配体,吡啶-咪唑,-苯并咪唑,-二噻吩并苯并咪唑和-菲并咪唑。设计这些配合物以研究环融合法所规定的扩展共轭对太阳能电池功率转换效率的影响。通过敏化的装置CB108中,吡啶菲并缀合复合物,显示出相比,这些吡啶并咪唑的共轭系统(的改进的效率(9.89%)CBTR,9.72%)和母未融合的环系统(CI101,6.24%)。令人惊讶的是,掺硫吡啶-二硫代间苯并咪唑体系(CB111,9.24%)的效率略低于N719(9.41%)。CB108的增强的光伏性能主要归因于电子寿命和扩散长度的增加,这是由电化学阻抗谱确定的。