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1、光電子·激光第23卷第6期2012年6月JournalofOptoelectronics·LaserVo1.23No.6June2012AZO種子層朝向對ZnO納米棒形貌和發(fā)光特性的影響林算治,林麗梅,林建平,瞿燕,賴發(fā)春(1_福建師范大學物理與光電信息科技學院,福建福州350007,2.寧德師范學院物理與電氣工程系,福建寧德352100)摘要:在水平管式爐中,采用熱蒸發(fā)鋅粉的方法,在鍍有摻鋁氧化鋅(Az0)薄膜的石英基片上制備了大量高密度的ZnO納米棒,AZO膜面分別正對和背對鋅源。利用掃描電子顯微鏡、x射線衍射儀以及
2、熒光光譜儀分析AZ0膜面朝向對ZnO納米棒的形貌、微結構及光學性能的影響。結果表明,不同朝向的AZ0膜面上所生長的納米棒具有相似的形貌和微結構。保溫時間10min樣品的氧空位的缺陷態(tài)發(fā)光為綠光,強度較強;保溫時間15min樣品的納米棒長度較長、相對垂直襯底,其近帶邊發(fā)光較強,氧間隙的缺陷態(tài)發(fā)光較弱。正對鋅源襯底上且保溫時間15min樣品的近帶邊發(fā)光最強,且缺陷態(tài)發(fā)光最弱。關鍵詞:ZnO納米棒;熱蒸發(fā);襯底朝向;形貌;光致發(fā)光中圖分類號:0472+.3文獻標識碼:A文章編號:1005—0086(2012)06—1103—0
3、6EffectofthedirectionofAZOseedlayeronmorphologiesandlu—minescencepropertiesofZnOnanorodsLINSuan-zhi,LINLi-mei,LINJian-ping,QUYan1,LAIFa-chun1(1.SchoolofPhysicsandOptoelectronicsTechnology,F(xiàn)ujianNormalUniversity,F(xiàn)uzhou350007,China;2.DepartmentofPhysicsandElectricE
4、ngineering,NingdeUniversity,Ningde352100,China)Abstract:HighdensityZnOnanorodshavebeensynthesizedonM-dopedZnO(AZO)filmwhichwasdepositedonquartzsubstratesbymagnetronsputtering,bythermallyevaporatingZnpowderwithoutusinganymetalcatalyst.TheAZOfilmswereintentionallyp
5、ositionedintWOdirectionsoffaceandbacktothezincsource.Morphology,structureandopticalpropertiesofthesampleswereinvestigatedbyscan—ningelectronmicroscopy(SEM),X-raydiffraction(XI)andfluorescencespectroscopy.TheresultsshowthattheZnOnanorodsonthesubstrateswithdifferen
6、tdirectionshavesimilarmorphologyandstructure.Photoluminescencespectrademonstratethatthesampleswith10mingrowingtimehaveastrongergreenemissionwhichisattributedtooxygenvacancies.Forthesampleswith15mingrowingtime,thenanorodsarelongerandmorevertical,andhaveastrongerne
7、arbandedgeemissionandawea—keroxygeninterva1emission.ThesamplegrownonAZOfilmfacingtothezincsourcesandwith15mingrowingtimehasthestrongestnearbandedgeemissionandtheweakestdeeplevelenergyemission.Keywords:ZnOnanorod;thermalevaporation;directionofsubstrate;morphology;
8、photoluminescence探測器、氣體傳感器、染料敏化太陽能電池嘲、場效1引言應晶體管、紫外可見激光器。制備一維ZnO納米材一維ZnO納米材料具有奇特的電子傳輸特性、光學料的方法很多,主要有水熱法嘲、溶膠凝膠法、金屬有特性和表面效應,可用于構造多種光電子器件,如紫外機氣相沉積法、脈沖激光沉積。和熱蒸發(fā)法m等。