A Highly Conjugated Benzimidazole Carbene-Based Ruthenium Sensitizer for Dye-Sensitized Solar Cells
作者:Shih-Yu Ho、Chaochin Su、Chung-Yen Li、Kumaresan Prabakaran、Ming-Tai Shen、Ying-Fan Chen、Wei-Chun Chang、Yogesh S. Tingare、Suribabu Akula、Sheng-Han Tsai、Wen-Ren Li
DOI:10.1002/asia.201300447
日期:2013.9
new type of carbene‐based ruthenium sensitizer, CB104, with a highly conjugated ancillary ligand, diphenylvinylthiophene‐substituted benzimidazolepyridine, was designed and developed for dye‐sensitized solar cell applications. The influence of the thiophene antenna on the performance of the cell anchored with CB104 was investigated. Compared with the dye CBTR, the conjugated thiophene in the ancillary
设计并开发了一种新型的基于卡宾的钌敏化剂CB104,其具有高度共轭的辅助配体,即二苯基乙烯基噻吩取代的苯并咪唑并吡啶,用于染料敏化太阳能电池应用。研究了噻吩天线对锚定CB104的细胞性能的影响。与染料CBTR相比,CB104辅助配体中的共轭噻吩增强了配体π–π *跃迁的摩尔消光系数和较低能量的金属-配体电荷转移带的强度。但是,锚定在CB104(0.15 m M)显示在420 nm下的最大值为63%。在相同的制造条件下,用染料CB104敏化的电池的功率转换效率为7.30%,低于使用非共轭敏化剂CBTR的电池的能量转换效率(8.92%)。这两种染料的性能差异表明,拉长共轭集光天线会导致短路光电流密度降低,这可能是由于染料分子的聚集所致。在共吸收剂鹅脱氧胆酸的存在下,CB104敏化的电池表现出增强的光电流密度,并实现了8.36%的光伏效率。