Synthesis of CuInS2 nanocrystals and their structural transformation triggered by ligand exchange

Nose Katsuhiro, Soma Yuki, Omata Takahisa, Otsuka Yao Matsuo Shinya

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Chalcopyrite-type CuInS2 NCs was synthesized by the hot-soap method. Mixed solutions, CuI and InCl3 dissolved in the mixture of the tri-octylphosphite and 1-octadecene and the sulfur dissolved in tri-phenylphosphite, were used as source solutions; the hexadecylamine was additionally mixed as a surfactant before the reaction. It was observed that the product CuInS2 NCs structurally transformed from the chalcopyrite(CP)- or zincblende(ZB)- to the wurtzite(WZ)-type depending on the amount of the surfactant and a storage time after the surfactant addition. Very weak photoluminescence in the near-infrared region was observed for the CP- or ZB-type NCs. This band was attributable to the electron-hole recombination via defect levels. No photoluminescence was detected for the wurtzite-type NCs.

Original languageEnglish
Pages (from-to)4005-4008
Number of pages4
JournalChinese Science Bulletin
Volume54
Issue number21
DOIs
Publication statusPublished - 2009 Nov 1
Externally publishedYes

Keywords

  • CuInS
  • Nanocrystal
  • Photoluminescence
  • Structure transformation
  • Ternary I-III-VI semiconductor

ASJC Scopus subject areas

  • General

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