dc.contributor.authorHossain, Md. Anower
dc.contributor.authorJennings, James Robert
dc.contributor.authorMathews, Nripan
dc.contributor.authorWang, Qing
dc.identifier.citationHossain, M. A., Jennings, J. R., Mathews, N., Wang, Q. (2012). Band engineered ternary solid solution CdSxSe1−x-sensitized mesoscopic TiO2 solar cells. Physical Chemistry Chemical Physics, 14(19), 7154-7161.
dc.description.abstractThe optical band gap of the light absorber and the alignment of its bands with the underlying wide band gap metal oxide are critical for efficient light harvesting and charge separation in semiconductor-sensitized solar cells (SSCs). In practice, these two requirements are however not always fulfilled concomitantly in SSCs. Favourable band alignment in CdSe-sensitized TiO2 requires utilization of quantum sized CdSe, which causes great losses in the harvesting of long wavelength photons due to quantum confinement effects. In the present study, ternary cadmium sulfoselenide (CdSxSe1−x), which has a tunable band gap between those of CdSe and CdS without reducing the dimension, was proposed as a sensitizer for TiO2. CdSxSe1−x was successfully synthesized by alternately depositing CdS and CdSe layers under ambient conditions. SSCs utilizing CdSxSe1−x-sensitized TiO2 yielded a power conversion efficiency of 4.05% under simulated AM1.5 100 mW cm−2 illumination, rivalling the well-studied cascaded CdS/CdSe electrodes when an aqueous polysulfide solution was used as the electrolyte and Cu2S as the counter electrode. The findings of the present study provide an alternative and viable approach for optimizing the energetics of semiconductor sensitizers for efficient charge separation, while also maintaining good light harvesting.en_US
dc.relation.ispartofseriesPhyiscal chemistry chemical physicsen_US
dc.rights© 2012 The Owner Societies.en_US
dc.titleBand engineered ternary solid solution CdSxSe1−x-sensitized mesoscopic TiO2 solar cellsen_US
dc.typeJournal Article
dc.contributor.schoolSchool of Materials Science and Engineeringen_US

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