Ag2S或CuS掺杂的Zn0.5Cd0.5S纳米晶体溶剂热法合成及光致发光性能.pdf

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1、第26卷第12期无机化学学报V01．26NO．122010年12月CHINESEJOURNA1OFINORGANICCHEMISTRY2203—2208Ag2S或CuS掺杂的Zn0．5Cd0．5S纳米晶体溶剂热法合成及光致发光性能朱金保畅晓莹朱国军袁高清f华南理工大学化学与化工学院，广州510640)C(1I1纳米晶体，考察了这些纳米晶体在吖见光区域摘要：以异l丙醇为溶剂，醇热法制备Zno．．sCd。js和Ag2S或CuS掺杂的Zno的光致发比性能结果表明，反应温度和反应时间、掺杂剂的浓度和种类对ZnCd。S的发光性能有很大的

2、影响，相比未掺杂Zn0CdS纳米晶体而高‘，Ag：S或CuS掺杂后其光敏发光强度明显增强、半高宽更宽。．s关键词：半导体；光致发光；纳米晶体；光学材料中图分类号：O611．4文献标识码：A文章编号：1001—4861(2010)12—2203—06ZnozCd0SNanocrystalsDopedwithAgesorCuS：．~SolvothermalSynthesisandPhotoluminescencePropertiesZHUJin．．BaoCHANGXiao--YingZHUGuo—JunYUANGao—Qing(S

3、choolofChemistryandChemicalEngineering．SouthChinaUniversityofTechnology,Guangzhou510640)CdSHaomwstalsandtheirderivativesdopedwithAgSorCuSweresynthesizedviasolvothermalAbstract：Znonn2a．5processusingisopropanolasthesolvent．Theopticalpropertiesoftheas—preparedsampleswe

4、reinvestigatedinthevisiblelightregion．Theresuhsshowthatthenatureandconcentrationofdopantsaswellaspreparationconditionsfreactionternperatureandtime)haveagreatinfluenceonthephotoluminescence(PL)spectraofZno．sCdo．sSnanocrystals．TheZnn5CdoSnanocrystalsdopedwithCuSandAg2

5、SexhibitastrongerPLintensityandwiderFWHM,~ffullwidthathalfmaximum)inthevisiblelightregioncomparedwiththeundopedZn0．5Cdo．5S．Keywords：semiconductor；ph【)toluminescence；nanocrystals；opticalmaterialsInthelastdecade．1I．VIsemiconductornanoma-Manyeffortshavebeendevotedtoimp

6、roveterials，especiallyCd1Zn_lsnanomaterials，havearousedp}10toluminescence(PL)propertiesofCdSorZnSconsiderableinterestduetotheirpotentialapplicationsnanocpystalsthroughdoping．Forexample，ZnSnanoer。inmanyareas．suchasthewindowmaterialforsolarvstalsdoDedwithMnSandFeScoul

7、dexhibitstrongercells[”，photocatalystsfortheproductionofhydrogenPLemissionspectra191．TheMn2+_dopedCdSnanocr—withvisiblelightI2-41．andphotoconductivedevicesystalscappedwithZnSdisplayedmuchstrongerandBesides，Cd1ncallhaveatunablebandgapfromsharperyellowPLemissioncompar

8、edwiththeundoped2．4to3．7eVviachangingCdcontent，whichmakesitasampleI．ZnSnanocrystalsdopedwithCuSshowavaluableopticalmaterial[．betterPLprope