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Title: Color tunable light-emitting diodes based on p+-Si/p-CuAlO2 /n-ZnO nanorod array heterojunctions
Authors: Ling, Bo
Zhao, Jun Liang
Sun, Xiaowei
Tan, Swee Tiam
Kyaw, Aung Ko Ko
Divayana, Yoga
Dong, Zhili
Keywords: DRNTU::Engineering::Materials::Photonics and optoelectronics materials
Issue Date: 2010
Source: Ling, B., Zhao, J. L., Sun, X., Tan, S. T., Kyaw, A. K. K., Divayana, Y. & et al.(2010). Color tunable light-emitting diodes based on p+-Si/p-CuAlO2 /n-ZnO nanorod array heterojunctions. Applied Physics Letters, 97.
Series/Report no.: Applied physics letters
Abstract: Wide-range color tuning from red to blue was achieved in phosphor-free p+-Si/p-CuAlO2/n-ZnO nanorod light-emitting diodes at room temperature. CuAlO2 films were deposited on p+-Si substrates by sputtering followed by annealing. ZnO nanorods were further grown on the annealed p+-Si/p-CuAlO2 substrates by vapor phase transport. The color of the p-CuAlO2/n-ZnO nanorod array heterojunction electroluminescence depended on the annealing temperature of the CuAlO2 film. With the increase of the annealing temperature from 900 to 1050 °C, the emission showed a blueshift under the same forward bias. The origin of the blueshift is related to the amount of Cu concentration diffused into ZnO.
DOI: 10.1063/1.3459963
Schools: School of Materials Science & Engineering 
Rights: © 2010 American Institute of Physics. This paper was published in Applied Physics Letters and is made available as an electronic reprint (preprint) with permission of American Institute of Physics. The paper can be found at: [DOI:]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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