標題: | Benzimidazole/Pyridoimidazole-Based Organic Sensitizers for High-Performance Dye-Sensitized Solar Cells |
作者: | Chaurasia, Sumit Li, Chun-Ting Desta, Mulu Berhe Ni, Jen-Shyang Lin, Jiann T. 應用化學系 Department of Applied Chemistry |
關鍵字: | benzimidazole derivatives;charge transfer;donor-acceptor systems;dye-sensitized solar cells;metal-free sensitizers |
公開日期: | 4-五月-2017 |
摘要: | A new series of benzimidazole (BIm)-based dyes (SC32 and SC33) and pyridoimidazole-(PIm) based dyes (SC35, SC36N and SC36) were synthesized as sensitizers for dye-sensitized solar cells (DSSCs). The N-substituent and C-substituent at the BIm and PIm cores were found to be the dominating factor in determining the electronic properties of the dyes and their DSSCs performance. The efficiency of BIm-based dyes (SC35 and SC36) was found to be higher than that of the PIm-based dyes (SC32 and SC33) due to better light harvesting. The C-substituents in SC36, a 4-hexylloxybenzene and a hexyl chain, are beneficial to dark current suppression, and hence SC36 achieves the best efficiency of 7.38% (approximate to 85% of N719). The two BIm dyes have better cell efficiencies than their congeners with a bithiophene entity between the BIm and the anchor due to better light harvesting of the former. |
URI: | http://dx.doi.org/10.1002/asia.201700039 http://hdl.handle.net/11536/145468 |
ISSN: | 1861-4728 |
DOI: | 10.1002/asia.201700039 |
期刊: | CHEMISTRY-AN ASIAN JOURNAL |
Volume: | 12 |
起始頁: | 996 |
結束頁: | 1004 |
顯示於類別: | 期刊論文 |