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Title
Japanese: 
English:Band gap engineering based on MgxZn1-xO and CdyZn1-yO ternary alloy films 
Author
Japanese: 牧野 哲征, 瀬川 勇三朗, 川崎 雅司, 大友 明, 白木 利佳, 田村 謙太郎, 安田 隆, 鯉沼 秀臣.  
English: T. Makino, Y. Segawa, M. Kawasaki, A. Ohtomo, R. Shiroki, K. Tamura, T. Yasuda, H. Koinuma.  
Language English 
Journal/Book name
Japanese: 
English:Applied Physics Letters 
Volume, Number, Page Vol. 78    No. 9    pp. 1237-1239
Published date Feb. 2001 
Publisher
Japanese: 
English: 
Conference name
Japanese: 
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Conference site
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File
Official URL <Go to ISI>://000167151000023
 
DOI https://doi.org/10.1063/1.1350632
Abstract We describe the structural and optical properties of II-VI oxide alloys, MgxZn1-xO and CdyZn1-yO, grown by pulsed-laser deposition. Single-phase alloyed films of (Mg,Zn)O and (Cd,Zn)O with c-axis orientations were epitaxially grown on sapphire (0001) substrates. The maximum magnesium and cadmium concentrations (x = 0.33 and y = 0.07, respectively) were significantly larger than the thermodynamic solubility limits. The band gap energies systematically changed from 3.0 (y = 0.07) to 4.0 eV (x = 0.33) at room temperature. The photoluminescence peak energy deduced at 4.2 K could be tuned from 3.19 to 3.87 eV by using Cd0.07Zn0.93O and Mg0.33Zn0.67O at both ends, respectively. The lattice constants of the a axis were monotonically increasing functions of the concentrations of both alloys. The exciton-phonon coupling strength was determined in Cd0.01Zn0.99O grown on a lattice-matched ScAlMgO4 substrate.

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