预览加载中，请您耐心等待几秒...

Eu,Mg共掺GaN薄膜的结构和发光性能研究.docx

预览
1/2
2/2

在线预览结束，喜欢就下载吧，查找使用更方便

下载提示 文本预览

如果您无法下载资料，请参考说明：

1、部分资料下载需要金币，请确保您的账户上有足够的金币

2、已购买过的文档，再次下载不重复扣费

3、资料包下载后请先用软件解压，在使用对应软件打开

Eu,Mg共掺GaN薄膜的结构和发光性能研究 Title:StructuralandLuminescentPropertiesofGaNThinFilmsCo-DopedwithEuandMg Abstract: Inrecentyears,therehasbeenagrowinginterestinthestudyofsemiconductormaterialsfortheirpotentialapplicationsinoptoelectronicdevices.Amongthesematerials,galliumnitride(GaN)hasemergedasapromisingcandidateduetoitswidebandgapandexcellentelectronicandopticalproperties.Inthisstudy,weinvestigatethestructuralandluminescentpropertiesofGaNthinfilmsco-dopedwitheuropium(Eu)andmagnesium(Mg). Introduction: GaNhasadirectbandgapof3.4eV,whichmakesitsuitableforuseinoptoelectronicdevicessuchaslight-emittingdiodes(LEDs)andlasers.However,toenhancetheluminescentpropertiesofGaN,variousdopingtechniqueshavebeenemployed.Inthisstudy,wefocusontheco-dopingofGaNwithEuandMg,asbothdopantshavebeenshowntohaveuniqueeffectsonthestructuralandluminescentpropertiesofGaN. ExperimentalMethods: TheGaNthinfilmsco-dopedwithEuandMgweregrownusingmolecularbeamepitaxy(MBE)technique.SeveralsampleswithdifferentEuandMgconcentrationswerepreparedtostudythedopanteffects.ThestructuralpropertiesofthefilmswereanalyzedusingX-raydiffraction(XRD)andtransmissionelectronmicroscopy(TEM).Theluminescentpropertieswerecharacterizedusingphotoluminescence(PL)spectroscopy. ResultsandDiscussion: XRDmeasurementsrevealedthattheGaNthinfilmsco-dopedwithEuandMgmaintainedthehexagonalwurtzitecrystalstructureofpureGaN.However,latticedistortionswereobservedduetotheincorporationofthedopants.TEManalysisfurtherconfirmedthepresenceoflatticedefectsandtheformationofnanoscaleregionsassociatedwiththedopantatoms. Photoluminescencemeasurementsshowedasignificantenhancementintheluminescentpropertiesoftheco-dopedGaNthinfilmscomparedtopureGaN.Theemissionspectraexhibitedabroadpeakcenteredaround620nm,whichcorrespondstotheredemissionfromEuions.ThissuggeststhattheEudopantsuccessfullyenteredtheGaNlatticeandactedasanefficientluminescentcenter.Additionally,theMgco-dopantwasfoundtoenhancethelightextractionefficiencyduetoitsroleinreducingdefect-relatednonradiativer