碲化铅纳米晶体的溶剂热制备及其光学性能  

Solvothermal Synthesis and Optical Property of PbTe Nanocrystals

作　　者：米刚[1] 李开瑞 杨久荣 朱一明[1] 张军[1] 

机构地区：[1]河南科技大学化工与制药学院,河南洛阳471023

出　　处：《河南科技大学学报（自然科学版）》2018年第2期94-98,共5页Journal of Henan University of Science And Technology:Natural Science

基　　金：国家自然科学基金项目(21576073);河南科技大学博士科研启动基金(13480045)

摘　　要：采用溶剂热反应方法合成了碲化铅(PbTe)纳米晶体。对PbTe纳米晶体进行了结构、组成表征,考察了反应温度对形貌的影响。并通过光学性能的测试,分析了PbTe纳米晶体的表面缺陷状态。分析结果表明:160℃反应得到的产物为化学整比的PbTe单晶,属面心立方结构,形貌为20 nm的方块颗粒,具有高的纯度和良好的结晶性能。PbTe纳米晶体在400~580 nm有强的紫外-可见吸收谱带,在825 nm左右有强的光致发光峰,证实合成的PbTe纳米晶体具有较少的表面缺陷。Lead telluride( PbTe) nanocrystals were synthesized by solvothermal reaction method.The structure and composition of PbTe nanocrystals were characterized.The effects of reaction temperature on the morphology was investigated.The surface defect states of Pb Te nanocrystals were analyzed by optical properties test. The analysis results show that the product obtained at 160 ℃ is Pb Te single crystal particles with chemical integral ratio which belonges to face centered cubic space group.The particles are cubes with 20 nm length,which have high purity and good crystallinity. The strong UV-visible absorption spectrum band of Pb Te nanocrystals are observed from 400 nm to 580 nm,and the photoluminescence emission peak at about 825 nm,which verify the little surface defects.

关 键 词：碲化铅 纳米晶体 溶剂热 光学性质 结构表征 

分 类 号：O614.6[理学—无机化学]