Raman and photoluminescence investigation of CdS/CdSe quantum dots on TiO2 nanoparticles with multi-walled carbon nanotubes and their application in solar cells |
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| Institution: | 1. Department of Environmental Sciences, Fatima Jinnah Women University, Rawalpindi, Pakistan;2. Department of Chemistry, Pittsburg State University, 1701 South Broadway Street, Pittsburg, KS 66762, USA;3. Department of Materials, Photon Science Institute and Sir Henry Royce Institute, Alan Turing Building The University of Manchester, Oxford Road, Manchester M13 9PL, U.K |
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| Abstract: | Raman spectroscopy and photoluminescence (PL) were used to investigate the improved short-circuit current density (JSC) of CdS/CdSe quantum dot (QD)-sensitized solar cells with multi-walled carbon nanotubes (MWCNTs). Raman and PL experiments were carried out in order to explore the hot-electron and cold-electron injections, respectively. The experimental results showed that the concentration of MWCNTs influences the hot-electron and cold-electron injections from CdS/CdSe QDs to TiO2 nanoparticles. Therefore, the improved JSC in CdS/CdSe QD-sensitized solar cells can be explained as due to the better electron injections. |
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| Keywords: | Energy transfer Raman scattering Photoluminescence |
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