%0 Journal Article
%T Synthesis of CuInS2 nanocrystals and their structural transformation triggered by ligand exchange
%A Nose Katsuhiro
%A Soma Yuki
%A Omata Takahisa
%A Otsuka-Yao-Matsuo Shinya
%J Chinese Science Bulletin
%@ 1861-9541
%D 2009
%I 
%R 10.1007/s11434-009-0153-z
%X 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.
%K ternary I-III-VI2 semiconductor
%K CuInS2
%K nanocrystal
%K structure transformation
%K photoluminescence
%U http://link.springer.com/article/10.1007/s11434-009-0153-z