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Title: CdSe-sensitized mesoscopic TiO2 solar cells exhibiting >5% efficiency : redundancy of CdS buffer layer
Authors: Hossain, Md. Anower
Jennings, James Robert
Shen, Chao
Pan, Jia Hong
Koh, Zhen Yu
Mathews, Nripan
Wang, Qing
Issue Date: 2012
Source: Hossain, M. A., Jennings, J. R., Shen, C., Pan, J. H., Koh, Z. Y., Mathews, N., et al. (2012). CdSe-sensitized mesoscopic TiO2 solar cells exhibiting >5% efficiency: redundancy of CdS buffer layer. Journal of Materials Chemistry, 22(32), 16235-16242.
Series/Report no.: Journal of materials chemistry
Abstract: Semiconductor-sensitized TiO2 solar cells employing CdSe as a light absorber demonstrate superior photovoltaic performance to the best-performing cascaded CdS/CdSe cells with practically identical optical density in the study. A careful comparison between CdSe and CdS/CdSe sensitized cells reveals that while CdS can greatly promote the subsequent growth of CdSe in the cascade electrodes and hence light harvesting, the presence of a CdS buffer layer impedes the injection of electrons from CdSe to TiO2 and accelerates charge recombination at the TiO2/sensitizer interface. As a result, better performance was achieved with CdSe-sensitized solar cells when light absorption is identical to that of CdS/CdSe cells, making the CdS buffer layer redundant. CdSe-sensitized TiO2 solar cells incorporating light scattering layers and an aqueous polysulfide electrolyte yielded an unprecedented power conversion efficiency of up to 5.21% under simulated AM 1.5, 100 mW cm−2 illumination.
DOI: 10.1039/c2jm33211f
Rights: © 2012 Royal Society of Chemistry.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MSE Journal Articles

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