Journal
TETRAHEDRON LETTERS
Volume 54, Issue 30, Pages 3985-3989Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2013.05.069
Keywords
Organic dyes; Carbazole; Absorption spectra; TDDFT computations; Dye-sensitized solar cells
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Funding
- Department of Science and Technology, New Delhi, India [DST/TSG/ME/2010/27]
- BASF, India
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New organic dyes containing diphenylamine donor, 2,7-carbazolyl pi-linker, and cyanoacrylic acid acceptor have been synthesized and characterized. They possess red-shifted absorption with high molar extinction coefficient when compared to the corresponding dyes with fluorene or phenyl units in the conjugation. The dye-sensitized solar cells fabricated using these dyes as sensitizers exhibited power conversion efficiencies as high as 6.8% which increased to 7.2% when chenodexoycholic acid (CDCA) was used to impede dye aggregation. The DSSCs with ionic liquid electrolytes displayed marked stability over 1000 h. (C) 2013 Elsevier Ltd. All rights reserved.
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