Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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Influence of the Composition of Shell Layers on the Photoluminescence of Cu0.2InS2 Semiconductor Nanocrystals with a Core-shell Structure

  • Kim, Young-Kuk (Division of Functional Materials Research, Korea Institute of Materials Science (KIMS)) ;
  • Ahn, Si-Hyun (Division of Functional Materials Research, Korea Institute of Materials Science (KIMS)) ;
  • Cho, Young-Sang (Division of Functional Materials Research, Korea Institute of Materials Science (KIMS)) ;
  • Chung, Kookchae (Division of Functional Materials Research, Korea Institute of Materials Science (KIMS)) ;
  • Choi, Chul-Jin (Division of Functional Materials Research, Korea Institute of Materials Science (KIMS)) ;
  • Shin, Pyung-Woo (Department of Materials Science and Engineering, Changwon National University)
  • Received : 2011.03.14
  • Published : 2011.11.25
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Abstract

We have synthesized core-shell structured nanocrystals based on chalcopyrite-type $Cu_{0.2}InS_2$. The photoluminescence of the nanocrystals shows a significant blueshift in the emission wavelength by shell capping with ZnS layers. This shift can be explained with the compressive stress to core nanocrystals applied by the formation of a ZnS shell layer with a large lattice mismatch with the core. In this study, the emission wavelength could be tuned by changing the composition of the shell layers. Nanocrystals with emission wavelength ranging from 575 nm through 630 nm were synthesized by varying the portion of cadmium compared with zinc in the shell layers.

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References

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