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Synthesis of Cu-In-S Fluorescent Nanocrystals

Published online by Cambridge University Press:  01 February 2011

Kosuke Watanabe ,
Masato Uehara ,
Hiroyuki Nakamura  and
Hideaki Maeda
Kosuke Watanabe
Affiliation:
wata-kou@mm.kyushu-u.ac.jp, Kyushu University, Interdiscplinary Graduate School of Engineering Sciences, 6-1,Kasugakoen, Kasuga, 816-8580, Japan, +81-92-583-8891, +81-92-583-8891
Masato Uehara
Affiliation:
wata-kou@mm.kyushu-u.ac.jp, Kyushu University, Interdiscplinary Graduate School of Engineering Sciences, 6-1,Kasugakoen, Kasuga, 816-8580, Japan, +81-92-583-8891, +81-92-583-8891
Hiroyuki Nakamura
Affiliation:
wata-kou@mm.kyushu-u.ac.jp, Kyushu University, Interdiscplinary Graduate School of Engineering Sciences, 6-1,Kasugakoen, Kasuga, 816-8580, Japan, +81-92-583-8891, +81-92-583-8891
Hideaki Maeda
Affiliation:
wata-kou@mm.kyushu-u.ac.jp, Kyushu University, Interdiscplinary Graduate School of Engineering Sciences, 6-1,Kasugakoen, Kasuga, 816-8580, Japan, +81-92-583-8891, +81-92-583-8891
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Abstract

CuInS2 (CIS) fluorescent nanocrystals (NCs) were obtained by heating organic metal complex. The photoluminescence (PL) originated from the donor-acceptor, and the quantum yield (QY) was achieved at 6%. Furthermore, we doped some metal ions (Zn2+, Cd2+ or Ag+) by the post heat-treatment in the organic coordinating solvent in order to tune the band gap of NCs. By this post treatment, the alteration of NCs structure was suggested, such as changing into an alloying and composite structure. In Zn-doping, the PL wavelength was widely tuned from 535 to 650 nm by alloying between CIS and ZnS. Moreover, PL intensity was increased with these structure alterations. In particular, the materials doped with Zn or Cd achieved respective QY of 25% and 40%.

Keywords

nanostructurealloyoptical properties
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1064: Symposium PP – Quantum-Dot and Nanoparticle Bioconjugates–Tools for Sensing and Biomedical Imaging , 2007 , 1064-PP03-19
Copyright
Copyright © Materials Research Society 2008

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References

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