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