資源描述：
《zno微納米結(jié)構(gòu)的可控制備、生長(zhǎng)機(jī)理及性能的研究》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
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
