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Your search keyword '"Zhao, D.W."' showing total 2 results
Start Over Author "Zhao, D.W." Topic cadmium selenide
2 results on '"Zhao, D.W."'

1. A highly effective method for synthesizing hybrid Pt–CdSe nanocomposite

Author

Chen, Jing, Zhao, D.W., Lei, Wei, Sun, X.W., Song, Junling, and Deng, Weiqiao

Subjects
*NANOCOMPOSITE materials, *CADMIUM selenide, *PLATINUM compounds, *MICROFABRICATION, *QUANTUM dots, *LIGANDS (Biochemistry), *SOLUTION (Chemistry), *TRANSMISSION electron microscopy
Abstract

Abstract: Hybrid Pt–CdSe nanocomposite was fabricated by a two-step chemical route. Cadmium selenide (CdSe) quantum rods (QRs) were prepared by a one-pot approach with tunable size. After ligand exchange, CdSe QRs were loaded with monodisperse 1.9nm Pt nanopaticles in aqueous solution. Transmission electron microscopy (TEM) revealed the morphology of the Pt–CdSe nanostructure, and the decreased photoluminescence (PL) intensity demonstrated that electron and hole separation can be enhanced after loading Pt on CdSe QRs. X-ray photoelectron energy spectrum (XPS) was applied to confirm the existence of Pt and detect the Pt mass concentration of 3%. [Copyright &y& Elsevier]

Published
2009
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2. Directly assembled CdSe quantum dots on TiO2 in aqueous solution by adjusting pH value for quantum dot sensitized solar cells

Author

Chen, J., Zhao, D.W., Song, J.L., Sun, X.W., Deng, W.Q., Liu, X.W., and Lei, W.

Subjects
*QUANTUM dots, *SOLAR cells, *CADMIUM selenide, *SOLUTION (Chemistry), *TITANIUM dioxide, *HYDROGEN-ion concentration, *PROPIONIC acid, *IRRADIATION
Abstract

Abstract: We report an improved quantum dot sensitized solar cell (QDSSC) by loading mercaptopropionic acid (MPA)-capped CdSe QDs on TiO2 film in aqueous solution. Under suitable pH value, a power conversion efficiency of 1.19% and an incident photon to current conversion efficiency of 26% for the QDSSC were obtained at AM1.5G irradiation. The improved performance of QDSSC is attributed to the large loading and good coverage of QDs on TiO2 film with optimal pH value. [Copyright &y& Elsevier]

Published
2009
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