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Choi, Kyoung Jin
Energy Conversion Materials (EcoMAT) Lab
Research Interests
  • Solar cells, thermoelectrics, piezoelectric

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Optical properties of single CdS nanosheets

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Title
Optical properties of single CdS nanosheets
Author
Rho, HeesukLee, Kyoung-YeonHoang, Thang B.Titova, Lyubov V.Mishra, AshuSmith, Leigh M.Jackson, Howard E.Yarrison-Rice, Jan M.Choi, Young-JinChoi, Kyoung Jin
Keywords
Micro-photoluminescence; Nanosheet; Time-resolved spectroscopy
Issue Date
2008-11
Publisher
KOREAN PHYSICAL SOC
Citation
JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.53, no.5, pp.3073 - 3076
Abstract
We study the optical properties of single CdS nanosheets using micro-photoluminescence and time-resolved photoluminescence (PL) techniques. At low temperature, we observe high quantum efficiency and strongly polarized PL emission, indicating high-quality single-crystal nanosheet growth. Photoluminescence from A and B exciton states is observed with different spatial distributions, suggesting the existence of a variation in strain in the nanosheets. Time-resolved photoluminescence measurements show the exciton lifetime to be similar to 230 ps, longer than that of the near-band-edge emission, but shorter than the lifetime of defect-related emission in single CdS nanowires.
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ISSN
0374-4884
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MSE_Journal Papers
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