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MgO coated TiO2 Binding with (CdSe)ZnS Quantum Dot for High Efficiency Solar Cells
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- Authors
- M.-H. Jung, M. G. Kang, Moo-Jung Chu
- Issue Date
- 2012-02
- Citation
- 한국 반도체 학술 대회 (KCS) 2012, pp.1-2
- Publisher
- 고려대학교 반도체기술연구소
- Language
- English
- Type
- Conference Paper
- Abstract
- We report on the placement of core-shell (CdSe)ZnS nanocrystallites quantum dot-sensitized solar cells on MgO passivated TiO 2 electrodes. An efficient charge transfer from core-shell (CdSe)ZnS dots to a TiO 2 was achieved because the ZnS shell suppresses the charge recombination at the electrode-electrolyte interface, causing more electrons to be injected into the TiO 2 conduction band. It is shown that the deposition of an MgO onto photoanodes used in dye-sensitized solar cells (DSSCs) improves their light-to-electric power conversion efficiency. As a result, we obtained an energy conversion efficiency of 1.18% by using 2.6 nm core-shell (CdSe)ZnS dots on MgO/TiO 2 under AM 1.5 irradiation.
- KSP Keywords
- Conversion efficiency(C.E.), Electric Power Conversion, Energy conversion efficiency, Quantum dot(Qdot), Tio 2, ZnS nanocrystallites, charge recombination, conduction band, core-shell, dye sensitized solar cells(DSSC), efficient charge transfer