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1、Availableonlineatwww.sciencedirect.comCERAMICSINTERNATIONALCeramicsInternational41(2015)7439–7445www.elsevier.com/locate/ceramint(001)-orientedCu2-ySethinfilmswithtunablethermoelectricperformancesgrownbypulsedlaserdepositiona,b,cba,na,b,nnbbYanhongLv,JikunChen,Ren-KuiZheng
2、,XunShi,JunqiangSong,TiansongZhang,aa,bXiaominLi,LidongChenaStateKeyLaboratoryofHighPerformanceCeramicsandSuperfineMicrostructure,ShanghaiInstituteofCeramics,ChineseAcademyofSciences,Shanghai200050,ChinabCASKeyLaboratoryofMaterialsforEnergyConversion,ShanghaiInstituteofCer
3、amics,ChineseAcademyofSciences,1295DingxiRoad,Shanghai200050,ChinacUniverisityofChineseAcademyofSciences,Beijing100049,ChinaReceived23November2014;receivedinrevisedform11February2015;accepted11February2015Availableonline18February2015AbstractHighly(001)-orientedCu2-ySethi
4、nfilmswithtunablethermoelectricperformanceshavebeengrownbypulsedlaserdeposition.ByusingtargetswithdifferentCu/Seratiosthatfurtherdeterminesthecopperdeficiencyofas-grownfilms,thecarrierconcentrationsofas-grownfilmsare18213203tunedwithinabroadrangefrom10to10cm.Theoptimumperfo
5、rmanceisobservedatcarrierconcentration1.5810cm.ThedistinctpropertiesofCu2-ySethinfilmswithnearlyidealchemicalstoichiometricratioareobserved.Inaddition,aweakchangeintheelectricaltransportduringthesecond-orderphasetransitionwasobservedinthethinfilmsduetotheanisotropicstruct
6、ureoftheCu2-ySe.&2015ElsevierLtdandTechnaGroupS.r.l.Allrightsreserved.Keywords:Cu2-ySethinfilms;Electricaltransport;Phasetransition;Thermoelectric1.Introductiontemperature.Theformerthreeparametersarecorrelatedwitheachother,whichvarywithmaterial'scarrierconcentrations.Therm
7、oelectric(TE)materialshavereceivedconsiderableRecently,copperchalcogenidesCu2-xX(X¼Se[4–6]andSamountofattentionsduetotheirabilitytorealizedirectconver-[7,8])compoundpossesseshighthermoelectricperformance.sionsbetweenthermalandelectricalenergiesassolidstatedevicesAccording
8、tothephasediagramofCu–Sesystem,theCu2Se[1,2].Inparticular,withtherapiddevelopmentofmicroelectron
