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时间:2020-03-04
《AZO种子层朝向对ZnO纳米棒形貌和发光特性的影响.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、光电子·激光第23卷第6期2012年6月JournalofOptoelectronics·LaserVol.23No.6June2012AZO种子层朝向对ZnO纳米棒形貌和发光特性的影响林算治1,林丽梅1,林建平1,2,瞿燕1,赖发春1*(1.福建师范大学物理与光电信息科技学院,福建福州350007,2.宁德师范学院物理与电气工程系,福建宁德352100)摘要:在水平管式炉中,采用热蒸发锌粉的方法,在镀有掺铝氧化锌(AZO)薄膜的石英基片上制备了大量高密度的ZnO纳米棒,AZO膜面分别正对和背对锌源。利用
2、扫描电子显微镜、X射线衍射仪以及荧光光谱仪分析AZO膜面朝向对ZnO纳米棒的形貌、微结构及光学性能的影响。结果表明,不同朝向的AZO膜面上所生长的纳米棒具有相似的形貌和微结构。保温时间10min样品的氧空位的缺陷态发光为绿光,强度较强;保温时间15min样品的纳米棒长度较长、相对垂直衬底,其近带边发光较强,氧间隙的缺陷态发光较弱。正对锌源衬底上且保温时间15min样品的近带边发光最强,且缺陷态发光最弱。关键词:ZnO纳米棒;热蒸发;衬底朝向;形貌;光致发光中图分类号:O472+.3文献标识码:A文章编号:
3、1005-0086(2012)06-1103-06EffectofthedirectionofAZOseedlayeronmorphologiesandlu-minescencepropertiesofZnOnanorods1,LINLi-mei1,LINJian-ping1,2,QUYan1,LAIFa-chun1*LINSuan-zhi(1.SchoolofPhysicsandOptoelectronicsTechnology,FujianNormalUniversity,Fuzhou350007,C
4、hina;2.Depart-mentofPhysicsandElectricEngineering,NingdeUniversity,Ningde352100,China)Abstract:HighdensityZnOnanorodshavebeensynthesizedonAl-dopedZnO(AZO)filmwhichwasdepositedonquartzsubstratesbymagnetronsputtering,bythermallyevaporatingZnpowderwithoutu-s
5、inganymetalcatalyst.TheAZOfilmswereintentionallypositionedintwodirectionsoffaceandbacktothezincsource.Morphology,structureandopticalpropertiesofthesampleswereinvestigatedbyscan-ningelectronmicroscopy(SEM),X-raydiffraction(XRD)andfluorescencespectroscopy.T
6、heresultsshowthattheZnOnanorodsonthesubstrateswithdifferentdirectionshavesimilarmorphologyandstructure.Photoluminescencespectrademonstratethatthesampleswith10mingrowingtimehaveastrongergreenemissionwhichisattributedtooxygenvacancies.Forthesampleswith15min
7、growingtime,thenanorodsarelongerandmorevertical,andhaveastrongernearbandedgeemissionandawea-keroxygenintervalemission.ThesamplegrownonAZOfilmfacingtothezincsourcesandwith15mingrowingtimehasthestrongestnearbandedgeemissionandtheweakestdeeplevelenergyemissi
8、on.Keywords:ZnOnanorod;thermalevaporation;directionofsubstrate;morphology;photoluminescence[1][2][3]探测器、气体传感器、染料敏化太阳能电池、场效1引言[4][5]应晶体管、紫外可见激光器。制备一维ZnO纳米材[6][7]一维ZnO纳米材料具有奇特的电子传输特性、光学料的方法很多,主要有水热法、溶胶凝胶法、金属有[8][9][10
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