Suppression of photocorrosion in CdS/CdSe quantum dot-sensitized solar cells: Formation of a thin polymer layer on the photoelectrode surface
- Suppression of photocorrosion in CdS/CdSe quantum dot-sensitized solar cells: Formation of a thin polymer layer on the photoelectrode surface
- 이원주; 손해정; 이도권; 김봉수; 김홍곤; 김경곤; 고민재
- Quantum dot sensitized; solar cell; Photocorrosion; photostability; Anodic oxidation; Passivation layer
- Issue Date
- Synthetic metals
- VOL 165, 60-63
- 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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