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Suppression of photocorrosion in CdS/CdSe quantum dot-sensitized solar cells: Formation of a thin polymer layer on the photoelectrode surface

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Title
Suppression of photocorrosion in CdS/CdSe quantum dot-sensitized solar cells: Formation of a thin polymer layer on the photoelectrode surface
Author
Lee, WonjooSon, Hae JungLee, Doh-KwonKim, BongSooKim, HonggonKim, KyungkonKo, Min Jae
Keywords
Quantum dot-sensitized solar cells;  Photocorrosion;  Anodic oxidation;  Photostability;  Passivation layer
Issue Date
201302
Publisher
ELSEVIER SCIENCE SA
Citation
SYNTHETIC METALS, v.165, no., pp.60 - 63
Abstract
Suppression of the photocorrosion process is an important subject for quantum dot-sensitized solar cells (QSSCs). A method is reported to suppress the substitution and anodic oxidation reaction in the photocorrosion process of CdS/CdSe QSSCs through the addition of poly(ethyleneoxide) (PEO) to liquid polysulfide electrolyte. In the presence of PEO in the electrolyte, a thin PEO layer is formed on the quantum dot (QDs) film using coordination bonding between the ether group in the PEO and Cd metal ions in the QDs, acting as passivation layer to suppress substitution reaction and anodic oxidation. Due to the passivation effect of PEO thin film, the photostability of QSSCs is significantly improved compared to the liquid polysulfide electrolyte without PEO.
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DOI
http://dx.doi.org/10.1016/j.synthmet.2013.01.008
ISSN
0379-6779
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SNS_Journal Papers
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