期刊
NANOSCALE RESEARCH LETTERS
卷 7, 期 -, 页码 -出版社
SPRINGEROPEN
DOI: 10.1186/1556-276X-7-672
关键词
Photoluminescence; Surface passivation; Quantum efficiency
资金
- National Research Foundation of Korea through the World Class University (WCU) [R31-2008-000-10075-0]
- Korean Government (MEST:NRF) [2010-0029065]
The effects of surface passivation on the photoluminescence (PL) properties of CdS nanoparticles oxidized by straightforward H2O2 injection were examined. Compared to pristine cadmium sulfide nanocrystals (quantum efficiency a parts per thousand... 0.1%), the surface-passivated CdS nanoparticles showed significantly enhanced luminescence properties (quantum efficiency a parts per thousand... 20%). The surface passivation by H2O2 injection was characterized using X-ray photoelectron spectroscopy, X-ray diffraction, and time-resolved PL. The photoluminescence enhancement is due to the two-order increase in the radiative recombination rate by the sulfate passivation layer.
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