Highly Efficient CdS Quantum Dot-Sensitized Solar Cells Based on a Modified Polysulfide Electrolyte

A modified polysulfide redox couple, [(CH3)4N]2S/[(CH3)4N]2S n , in an organic solvent (3-methoxypropionitrile) was employed in CdS quantum dot (QD)-sensitized solar cells (QDSSCs), and an unprecedented energy conversion efficiency of up to 3.2% was obtained under AM 1.5 G illumination. The QDs were...

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Bibliographic Details
Published in:Journal of the American Chemical Society 2011-06, Vol.133 (22), p.8458-8460
Main Authors: Li, Ling, Yang, Xichuan, Gao, Jiajia, Tian, Haining, Zhao, Jianzhang, Hagfeldt, Anders, Sun, Licheng
Format: Article
Language:English
Subjects:
ARRAY
ENERGY
GOLD
LOW-COST
NANOCRYSTALLINE TIO2
NATURAL SCIENCES
NATURVETENSKAP
PHOTOELECTRODES
TIO2 FILMS
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Summary:A modified polysulfide redox couple, [(CH3)4N]2S/[(CH3)4N]2S n , in an organic solvent (3-methoxypropionitrile) was employed in CdS quantum dot (QD)-sensitized solar cells (QDSSCs), and an unprecedented energy conversion efficiency of up to 3.2% was obtained under AM 1.5 G illumination. The QDs were linked to nanoporous TiO2 via covalent bonds by using thioglycolic acid, and chemical bath deposition in an organic solvent was then used to prepare the QDSSCs, facilitating high wettability and superior penetration capability of the TiO2 films. A very high fill factor of 0.89 was observed with the optimized QDSSCs.
ISSN:0002-7863
1520-5126
1520-5126
DOI:10.1021/ja201841p