導電玻璃襯底上氧化鋅薄膜的電化學沉積與表征.pdf

1、華中師范大學碩士學位論文導電玻璃襯底上氧化鋅薄膜的電化學沉積與表征姓名：羅利娟申請學位級別：碩士專業(yè)：材料物理與化學指導教師：唐一文20070608⑧＼：：一，碩士學位論文MASTER’STHESISAbstractZincoxide(ZnO)aII—VIcompoundsemiconductorwithadirectbandgapof337eVandarelativelyhighexcitonbindingenergy(60meV)a

2、troom—temperature，displaysexcellentpiezoelectric，catalysis，andnovelopticalpropertiesOnedimension(1D)ZnOnanoscalearrayfilmshavebeenattractingmuchattentioninrecentyearsforitsspecificphoticsandelectficscharacteristicsorigin

3、atingfromtheiruniqueheterogeneouscrystallographicalstructuresAndSOthepreparationandapplicationofIDZnOarrayfilmshavebecomethehotspotofmanymaterialresearchersthroughouttheworldWelldefined1DZnOsuchasnanowire，nanorod，nanotub

4、e，nanobeltthinfilmshavebeenpreparedbyvariousprocessesAmongthesemethodselectrodepositiontakesadvantagesofitssimplicity，lowtemperatureprocessing，lowequipmentcost，thepossibilityinpreparinglargeareathinfilms，andprecisecontro

5、llingofthefilmthicknessandthemorphologybychangingthedepositionparametersInthisthesis，large—scale，singlecrystallineZnOnanotubearrayshavebeenfabricateddirectlyontoFdopedSn02glasssubstrate(TCO)viaelectrochemicaldepositionme

6、thodfromanZnCl2、KCIand02mixedaqueoussolutionforthefirsttimeMoreimportant，inourpreparation，preformedseedswerenotnecessaryTheas—preparednanotubesrevealahexagonalwurtzitestructureandtheCaxisisthepreferentialgrowthdirectionW

7、ealsoCanobtainZnOnanorodarrayfilmsbychangingthedepositionvoltageOurresultsshowthattheelectrodepositionvoltage，depositionmodelandthestirringspeedcanaffectthemorphologyofthefilmsTheheterogeneousnucleationattheinitialdeposi

8、tionstageiscrucialforthegrowthoftheperpendicularnanotubeandnanorodarraysHoweverthedissolved02playsakeyroleinimprovingthequalityoftheZnOcrystalduringthedepositionprocessWehavestudiedtheelectrochemicalbehaviorandthedeposit

9、ionmechanismofZnOthinfilmsinaZn(N03)2electrolyteinthethesisandfoundthatthedepositiontemperature，voltage，surfactant(PVP)andtheinorganicionsuchasCI。couldimpacttheresultsofthedepositionThegrowthspeedandthecrystalsizeofZnOwi

10、llincreaseifdepositiontemperatureinhancedPVPplaysadecisivepartincontrollingZnOgrainsizeandmorphologybyreducingreactionratebetweenZn2十ionsandhydroxide，decreasinggrainsaggregationduetotheadsorptionofPVPonZnOcrystalfaceOthe

11、rwiseifwechangethecomponentsoftheelectrolytebyinjectingCI‘ion，wecouldobtainZnOfilmsofhexagonalwurtzitestructurenanosheemAkindofdoublelayersZnOthinfilmwithcompactandnanoporouslayerswasassembledandappliedindyesensitizesola