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ChemSusChem. 2019 Jun 5. doi: 10.1002/cssc.201900505. [Epub ahead of print]

High-Performance Organic Dyes with Electron-Deficient Quinoxalinoid Heterocycles for Dye-Sensitized Solar Cells under One Sun and Indoor Light.

Author information

1
Department of Chemistry, Tunghai University, No.1727, Sec.4 Boulevard, Xitun District, Taichung, 40704, Taiwan.
2
Department of Chemistry, National Central University, No.300, Zhongda Rd., Zhongli District, Taoyuan, 32001, Taiwan.

Abstract

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 TiO2 surface.

KEYWORDS:

co-sensitization; dyes; indoor light; quinoxaline; solar cells

PMID:
31168948
DOI:
10.1002/cssc.201900505

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