氧氩比和热处理对ZnO:Eu^3+薄膜的结构及其发光性质的影响  

Effects of O2/Ar Ratio and Annealing on Structural and Photoluminescence Properties of ZnO. Eu^3+ Films

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作  者:高振杰[1] 杨元政[1] 王彦利[1] 谢致薇[1] 

机构地区:[1]广东工业大学材料与能源学院,广东广州510006

出  处:《中国材料科技与设备》2011年第4期55-58,共4页Chinese Materials Science Technology & Equipment

基  金:国家自然科学基金资助项目(50771037);高等学校博士学科点专项科研基金资助项目(200805620004)

摘  要:用射频磁控溅射法在石英衬底上制备了ZnO:Eu^3+薄膜,通过X射线衍射仪和荧光光谱仪对样品进行了表征,考察了氧氩比和退火工艺对其结构及发光性能的影响。结果表明:样品均呈现ZnO的六角纤锌矿结构,适当的氧氩比有利于ZnO的C轴择优取向的形成,高温退火会使晶粒尺寸增大;合适的氧氩比,尤其是退火工艺(700℃)可以促进ZnO基质(372nm)到Eu^3+离子(^5Do-^7F2)之间的能量传递,但过多的氧及高温退火不利于稀土Eu^3+离子465nm(^7Fo-^5D2)到611nm(^5Do-^7F2)的直接能量传递。ZnO: Eu^3+ thin films were deposited on quartz substrates by rf magnetron sputtering. The obtained samples were characterized using X--ray diffraction (XRD) and spectrometer, respectively. Effects of O2/Ar ratio and heat treatment on the structure and photoluminescence (PL) were studied in detail. The results show that: All of the films have a hexagonal wurtzite structure of ZnO. Suitable 02/Ar ratio improves the (002) preferred orientation. The grain size increases after heat treatment. Suitable O2/Ar ratio, especially the heat treatment (700℃) can enhance the energy transfer from ZnO host (372nm) to doped Eua+ (^5D0 --^7F2 ), while the energy transfer from ^7Fo--^5De (465nm) to ^5Do--^7F2 (611nm) decreases with increasing O2/Ar ratio and annealing temperature.

关 键 词:ZnO:Eu^3+ 磁控溅射 光致发光 

分 类 号:O482.31[理学—固体物理] O484.1[理学—物理]

 

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