Synthesis of CuInS_2 nanocrystals and their structural transformation triggered by ligand exchange  

作　　者：KATSUHIRO Nose YUKI Soma TAKAHISA Omata SHINYA Otsuka-Yao-Matsuo 

机构地区：[1]Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Ymadaoka, Suita, 565-0871, Japan

出　　处：《Chinese Science Bulletin》2009年第21期4005-4008,共4页

摘　　要：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 electronhole recombination via defect levels. No photoluminescence was detected for the wurtzite-type NCs.Chalcopyrite-type CulnS2 NCs was synthesized by the hot-soap method. Mixed solutions, Cul 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 CulnS2 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 nearinfrared region was observed for the CP- or ZB-type NCs. This band was attributable to the electronhole recombination via defect levels. No photoluminescence was detected for the wurtzite-type NCs.

关 键 词：电脑合成 脑结构 配体交换 纳米晶体 红外光致发光 表面活性剂 网络电脑 引发 

分 类 号：P575[天文地球—矿物学]