ZnO Nanoparticles-CdS Quantum Dots/N3 Dye Molecules: Dual Photosensitization
- Authors
- Ganesh, T.; Mane, Rajaram S.; Cai, Gangeri; Chang, Jin-Ho; Han, Sung-Hwan
- Issue Date
- May-2009
- Publisher
- AMER CHEMICAL SOC
- Citation
- JOURNAL OF PHYSICAL CHEMISTRY C, v.113, no.18, pp.7666 - 7669
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF PHYSICAL CHEMISTRY C
- Volume
- 113
- Number
- 18
- Start Page
- 7666
- End Page
- 7669
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/176872
- DOI
- 10.1021/jp901224n
- ISSN
- 1932-7447
- Abstract
- We developed dual photosensitization, in which US quantum dots serve as a sandwich layer between the ZnO nanoparticles (NPs) and N3 dye molecules, alleviating the serious issues of CdS photocorrosion and the Zn2+/N3 dye complex formation leading to insulating surface aggregation. The improvement in the solar-to-electrical conversion efficiency from 0.11 and 0.85 to 3.04% when compared to ZnO/N3 and ZnO-CdS, respectively, is attributed to the effective coupling between the ZnO NPs/N3 dye molecules in the presence of US QDs, which in turn enhances the rate of electron injection due to the faster electron injection and transfer rate. Strong ZnO NPs-CdS QDs linking is explored systematically using UV-vis spectroscopy and is interpreted with a charge transfer resistance obtained from impedance spectroscopy studies.
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