期刊
ADVANCED FUNCTIONAL MATERIALS
卷 24, 期 14, 页码 1988-1993出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201303449
关键词
zinc oxide; nanoparticles; quantum dots; luminescence
类别
资金
- Materials Research Science and Engineering Center
- NSF [DMR-DMR-0819885]
- Deutsche Forschungsgemeinschaft [DFG-GRK-1240]
Nonthermal plasmas allow the preparation of ligand-free quantum dots combining high production rates with superior crystalline quality and luminescence properties. Here, ZnO quantum dots are produced in a radiofrequency capacitively-coupled plasma, exhibiting size dependent photoluminescent quantum yields up to 60% after air exposurethe highest reported to date for any compound semiconductor quantum dots prepared in the gas phase. Systematic studies indicate the importance of the surface for the observed luminescence behavior. The high luminescent quantum yields in the visible range of the spectrum and the ligand-free, scalable synthesis make these quantum dots good candidates for light emitting applications.
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