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有机纳米颗粒复合Co掺杂ZnO热电性能研究(英文) ResearchonThermalandElectricalPropertiesofCo-dopedZnOCompositeNanoparticles Abstract Inthisstudy,weinvestigatedthethermalandelectricalpropertiesofCo-dopedZnOcompositenanoparticlessynthesizedthroughasimpleandlow-costsol-gelmethod.Organicnanoparticleswereusedasadispersanttofacilitatethesynthesisanddispersionofthenanoparticles,anddifferentconcentrationsofCowereaddedtostudytheireffectsonthepropertiesofthecompositenanoparticles.TheresultsshowedthatthethermalconductivityofthecompositenanoparticlesdecreasedwithincreasingCoconcentration,whiletheelectricalconductivityincreased.Furthermore,theSeebeckcoefficientwasalsoenhanced,indicatinganimprovementinthethermoelectricperformanceofthecompositenanoparticles. Introduction Thermoelectricmaterialsaremuchindemandduetotheirpotentialapplicationintemperaturecontrol,heatrecovery,andenergyharvesting.ZnOisapromisingthermoelectricmaterialduetoitshighSeebeckcoefficientandeasysynthesis.However,itslowelectricalconductivityandthermalconductivitylimititsperformance.Co-dopinghasbeenshowntoenhancethethermoelectricpropertiesofZnOandimproveitscarrierconcentrationandmobility. Recently,theuseoforganicnanoparticlesasdispersantshasbecomeincreasinglypopularinthesynthesisofinorganicnanoparticles.Organicnanoparticlescanactasastabilizer,surfactant,ordispersant,whilesimultaneouslyreducingthesizeoftheparticlesandimprovingtheirdispersibility. Inthisstudy,wesynthesizedCo-dopedZnOcompositenanoparticlesusingasimplesol-gelmethodwithorganicnanoparticlesasadispersant.WeinvestigatedthethermalandelectricalpropertiesofthecompositenanoparticlesasafunctionofCoconcentration. ExperimentalMethods TheCo-dopedZnOcompositenanoparticlesweresynthesizedusingasol-gelmethodwithorganicnanoparticlesasadispersant.Zincacetate,cobaltacetate,andpolyvinylpyrrolidone(PVP)wereusedasthestartingmaterials.TheCoconcentrationwasvariedfrom0.5mol%to5mol%. ThepreparednanoparticleswerecharacterizedusingX-raydiffraction(XRD),transmissionelectronmicroscopy(TEM),energydisper