石墨烯pn结的电流理论特性研究

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1、本科生毕业论文（设计）石墨烯PN结的电流理论特性研究TheoreticalstudyofelectronictransportpropertiesofgraphenePNjunctions姓名与学号3071102254指导教师年级与专业电子科学与技术07级所在学院信息与电子工程学系摘要在本文中，基于第一性原理计算，我们检验了金属接触对于石墨烯的掺杂影响。之后，我们使用金属接触构建了石墨烯PN结结构。我们通过电流电压特性曲线和透射率曲线研究了石墨烯PN结的电流传输性质。尽管石墨烯PN结在导通正向电流和抑制反向电流这一特点上和传统PN结有所相似，但仍然有很多新颖的现象存在于石墨烯P

2、N结中。我们还研究了使用六方氮化硼衬底时石墨烯PN结的电流传输情况。PN结在电子器件中非常重要，对于石墨烯PN结的研究将会促进石墨烯电子这一后硅时代很有前景的领域的发展。关键词：石墨烯PN结掺杂第一性原理氮化硼AbstractInthiswork,weexaminedtheeffectsofmetalcontactsonthedopingtypeofgraphenebasedonfirst-principlescalculation.ThenweusedthemetalcontactstechniquetoconstructseveralkindsofgraphenePNjun

3、ctions.WeexplorethecurrenttransportmechanismthroughthePNjunctionsbytheircurrent-voltagecharacteristicandtransmissionplots.GraphenePNjunctionsbehavedliketraditionalPNjunctionsbytransmittingpositivecurrentandsuppressingnegativecurrent,alsotherearesomenovelphenomenaingraphenePNjunctionsthatared

4、ifferentfromtraditionalPNjunctions.Wealsoinspectthesituationswhereh-BNsubstratewasused.PNjunctionsareveryimportinginelectronicandoptoelectronicdevices,andthestudyofgraphenePNjunctionswillputforwardthedevelopmentofgrapheneelectronics,averypromisingtechnologyinthepost-Siliconera.Keywords:graph

5、enePN-junctiondopingfirst-principlesBNContent1.Introduction12.Method23.Results83.1Dopinggraphenewithmetalcontacts83.2Cu

6、graphene–Au

7、graphenePNjunction103.3Cu

8、graphene–Pt

9、graphenePNjunction133.4Cu

10、graphene

11、BN–Au

12、graphene

13、BNPNjunction153.5Cu

14、graphene

15、BN–Pt

16、graphene

17、BNPNjunction173.6Cu-graphene

18、junction184.Conclusion195.Acknowledgement20References20Appendix22浙江大学本科生毕业论文石墨烯PN结的电流理论特性研究1.IntroductionGraphene,amonolayermaterialconsistsofcarbonatomstightlypackedintohoneycomblattices,hasbeenthefocusofmanyheatedresearchessinceitsfirstdiscoveryin2004byA.K.GeimandK.S.Novoselov[1].Asanovelm

19、aterial,graphenehasseveraloutstandingpropertiesthatmakeitpromisinginvariouskindsofapplications[2][3].Amongthem,theapplicationofgrapheneinmicro-/nano-electronicdeviceshasattractedmuchattention.Graphenehasmanygoodanduniqueelectricalpropertiesthatfitt