采用电化学方法在磁控溅射方法生长的ZnO薄膜上生长垂直于衬底排列的ZnO纳米柱.ZnO薄膜的作用主要是为ZnO纳米柱的生长提供同质外延层.电化学生长的ZnO纳米柱具有良好的晶体质量和发光性能.通过研究其变温发光光谱可以确定其紫外发光峰来自于带边激子的辐射复合.此种方法生长的ZnO纳米柱在场发射显示、蓝紫色和白光发光二极管方面有潜在的应用前景.
Vertically aligned ZnO nanorods were electrodeposited on the ZnO thin films grown by magnetron sputtering. The ZnO thin films were served as a homoepitaxy layer for the growth of ZnO nanorods. The rods were perfectly oriented in a vertical direction and there were no side branches. The ZnO nanorods grown on ZnO thin films have a good crystal quality with a low defect concentration and greatly improve the photoluminescence property of the thin films. The redshift of the peak energy with rising temperature in temperature-dependent photoluminescence spectrum for the UV emission proved its excitonic origin.
参考文献
| [1] | Onuma T,Chichibu S F,Uedono A,et al.Reduced defect densities in the ZnO epilayer grown on Si substrates by laser-assisted molecular-beam epitaxy using a ZnS epitaxial buffer layer[J].Appl.Phys.Lett.,2004,86(23):5586-5588. |
| [2] | Kim D C,Han W S,Cho H K,et al.Multidimensional ZnO light-emitting diode structures grown by metal organic chemical vapor deposition on p-Si[J].Appl.Phys.Lett.,2007,91(23):231901(1-3). |
| [3] | Shan F K,Liu G X,Lee W J,et al.Aging effect and origin of deep-level emission in ZnO thin film deposited by pulsed laser deposition[J].Appl.Phys.Lett.,2005,91,86(22):221910(1-3). |
| [4] | Yanhong Tong,Yichun Liu,Lin Dong,et al.Growth of ZnO nanostructures with different morphologies by using hydrothermal technique[J].J.Phys.Chem.B,2006,110(42):20263-20267. |
| [5] | Baganall D M,Chen Y F,Zhu Z,et al.High temperature excitonic stimulated emission from ZnO epitaxial layers[J].Appl.Phys.Lett.,1998,73(8):1038(1-3). |
| [6] | Jung S W,Park W I,Cheong H D,et al.Time-resolved and time-integrated photoluminescence in ZnO epilayers grown on Al2O3(0001) by metalorganic vapor phase epitaxy[J].Appl.Phys.Lett.,2002,80(11):1924(1-3). |
| [7] | Vanheusden K,Seager C H,Warren W L,et al.Correlation between photoluminescence and oxygen vacancies in ZnO phosphors[J].Appl.Phys.Lett.,1996,68(3):403(1-3). |
| [8] | Djurisic A B,Choy W C H,Roy V A L,et al.Photoluminescence and electron paramagnetic resonance of ZnO tetrapod structures[J].Adv.Funct.Mater.,2004,14(9):856-864. |
| [9] | Garces N Y,Wang L,Bai L,et al.Role of copper in the green luminescence from ZnO crystals[J].Appl.Phys.Lett.,2002,81(4):622(1-3). |
| [10] | Reynolds D C,Look D C,Jogai B,et al.Similarities in the bandedge and deep-centre photoluminescence mechanisms of ZnO and GaN[J].Solid State Commun.,1997,101(11):643-646. |
| [11] | Chen Y,Bagall D M,Koh H J,et al.Plasma assisted molecular beam epitaxy of ZnO on c -plane sapphire:Growth and characterization[J].J.Appl.Phys.,1998,84(7):3912-3918. |
| [12] | Varshini Y P.Temperature dependence of the energy gap in semiconductors[J].Physica (Amsterdam),1967,34(1):149-154. |
| [13] | Ko H J,Chen Y F,Zhu Z,et al.Photoluminescence properties of ZnO epilayers grown on CaF2(111) by plasma assisted molecular beam epitaxy[J].Appl.Phys.Lett.,2000,76 (14):1905(1-3). |
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