期刊
CHEMSUSCHEM
卷 12, 期 15, 页码 3654-3665出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201900505
关键词
co-sensitization; dyes; indoor light; quinoxaline; solar cells
资金
- Ministry of Science and Technology of Taiwan [MOST 107-2113-M-008-010-, 107-2113-M-029-010-, 107-2113-M-029-011-]
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 pi-bridge (D-A-pi-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 TiO2 surface.
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