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Chin. Phys. B, 2014, Vol. 23(4): 048105    DOI: 10.1088/1674-1056/23/4/048105
INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY Prev   Next  

Formation of ZnGa2O4 films by multilayer deposition and subsequent thermal annealing

Yan Jin-Liang, Zhao Yin-Nü, Li Chao
School of Physics and Optoelectronic Engineering, Ludong University, Yantai 264025, China
Abstract  The Ga2O3/ZnO multilayer films are deposited on quartz substrates by magnetron sputtering, the thickness values of Ga2O3 layers are in a range of 19 nm-2.5 nm and the thickness of ZnO layer is a constant of 1 nm. Formation of spinel ZnGa2O4 film is achieved via the annealing of the Ga2O3/ZnO multilayer film. The influences of original Ga2O3 sublayer thickness on the optical and structural properties of Ga2O3/ZnO multilayer films and annealed films are studied. With the decrease of the thickness of Ga2O3 sublayer, the optical band-gap of Ga2O3/ZnO multilayer film decreases, the intensity of UV emission diminishes and the intensity of violet emission increases. The annealed film displays the enlarged optical band gap and the quenched violet emission. UV fluorescence bands are observed from Ga2O3 and ZnGa2O4.
Keywords:  multilayer films      optical band-gap      optical transmittance      photoluminescence  
Received:  22 August 2013      Revised:  22 September 2013      Accepted manuscript online: 
PACS:  81.15.-z (Methods of deposition of films and coatings; film growth and epitaxy)  
  68.55.-a (Thin film structure and morphology)  
  78.20.-e (Optical properties of bulk materials and thin films)  
  68.60.-p (Physical properties of thin films, nonelectronic)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10974077), the InnovationProject of Shandong Graduate Education, China (Grant No. SDYY13093), and the Natural Science Foundation of Shandong Province, China (Grant No. ZR2010AL026).
Corresponding Authors:  Yan Jin-Liang     E-mail:  yanjinliang8@sina.com
About author:  81.15.-z; 68.55.-a; 78.20.-e; 68.60.-p

Cite this article: 

Yan Jin-Liang, Zhao Yin-Nü, Li Chao Formation of ZnGa2O4 films by multilayer deposition and subsequent thermal annealing 2014 Chin. Phys. B 23 048105

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