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《zno微納米結構的可控制備、生長機理及性能的研究》由會員上傳分享，免費在線閱讀，更多相關內(nèi)容在學術論文-天天文庫。
1、ABSTRACTAsanimportantlow-costsemiconductorfunctionalmaterialwithlargebandgap(3．37eV)andlargeexcitationbindingenergy(60meV)，zincoxide(ZnO)isrecognizedaSoneofthemostpromisingmaterialsforoptoelectronicapplications．NanostructuredZnOhaSdrawnconsiderableattentionduetoitsuniqueelectrical，mechanical，andopt
2、icalproperties，inadditiontoitsapplicationsinnumerousfields，suchassolarcells，gaSsensors，piezoelectricmaterials，photoniccrystals，andoptoelectricdevices．However,therearestillthreebasicquestionsoftheZnOnanomaterial：firstly,thespecificsurfaceareaofnanoZnOmaterialsarelow；Secondly,thecontrollablepreparati
3、onoforderlynanoarrayisdifficult，andtheelectron-holerecombinationrateishighindisorderedstructures，whichleadtoalowphotoelectricalconversion．Thirdly,themechanismoftheformationofthenanostructureisstillnotclear．Asaresult，thereisofgreatsignificancetostudythepreparationofhighspecificsurfacearea．Inthiswork
4、，one—dimensionalandthree—dimensionaldifferentmorphologiesZnOnanostructurehavebeensuccessfullypreparedbyasimplehydrothermalmethod，andthemainrearchworkandresultswereaSfollowing．WithZn(N03)2andC6H12N4aSrawmaterial，theorderlyZnOnanorodarrayhaSbeensuccessfullypreparedbycontrollingtheprecursorconcentrati
5、onandreactiontime．TheresultsdemonstratedthattheoptimumconditionofpivotalcraftworkoftheZnOnanorodsarray：precursorconcentrationisO．02mol／L．thereactiontimeis4h．DuetothethinstructureandroughsurfacewhichCanabsorbmoredyesandmorereactivecenter,theZnOnanorodsarraypreparedatthisoptimumconditionshowsthebestp
6、hotoelectricperformance．TheThree·-dimensionalseaurchinZnOmicro·-nanostructurewasfirstsuccessfullypreparetedbyhydrothermalmethodinZn(Y03)2一NH3，withFTOconductiveglassaSthebase．TheZnOmicro—nanostructurecrystalissinglecrystalstructure，thelatticedistance(0001)isabout0．26nln．WeCanprepareThree-dimensional
7、seaurchinZnOmicro—nanostructurebycontrollingthereactiontemperature，reactiontimeandpHvalue．AndtheresultsIIIdemonstratedthattheoptimumconditionofpivotalcraftworkoftheZnOnanorodsarray：s：pHvalueis9，thereactiont
