Premium
High‐Performance Organic Dyes with Electron‐Deficient Quinoxalinoid Heterocycles for Dye‐Sensitized Solar Cells under One Sun and Indoor Light
Author(s) -
Jiang Man Ling,
Wen JunJie,
Chen ZiMing,
Tsai WenHsuan,
Lin TzuChau,
Chow Tahsin J.,
Chang Yuan Jay
Publication year - 2019
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201900505
Subject(s) - photochemistry , dye sensitized solar cell , moiety , quinoxaline , absorption (acoustics) , electron acceptor , sunlight , chemistry , acceptor , molar absorptivity , energy conversion efficiency , electron donor , electron , materials science , optoelectronics , organic chemistry , optics , catalysis , physics , electrode , electrolyte , composite material , condensed matter physics , quantum mechanics
A series of Y‐shaped sensitizers incorporating quinoxaline or quinoxalinoid moieties were prepared and applied in dye‐sensitized solar cells (DSSCs). By the introduction of quinoxalinoid functionalities, the absorption extinction coefficients could be enhanced. The molecular structures were modified by introducing an extra acceptor group (A) between a donor (D) and a π‐bridge (D–A–π–A) and also by incorporating electron‐donating substituents at various positions of the quinoxalinoid moiety. Some of the dyes and mixtures thereof were found to exhibit good light‐harvesting efficiencies under both sunlight and indoor light, with efficiencies up to 7.92 % under one sun (AM 1.5G). When operated under indoor light, the efficiency could be boosted to 27.76, 28.74, and 30.45 % under 600, 1000, 2500 lux illumination, respectively. The best performance could be ascribed partly to an improved dye coverage on the TiO 2 surface.