Influence of GaN Barrier Thickness on Optical Properties of In-Graded InGaN/GaN Multiple Quantum Wells
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概要
- 論文の詳細を見る
The barrier thickness dependences of the optical properties of In-graded InGaN/GaN quantum wells (QWs) are studied by photoluminescence measurement and theoretical calculation. The internal quantum efficiencies (IQEs) of the In-graded QWs with 8 and 16 nm barrier thicknesses and the conventional QWs with 16 nm barrier thickness are 35.0, 31.2, and 22.8% at 300 K, respectively. Besides, the In-graded QWs with 8 nm barrier thickness obtain the shortest radiative lifetime at 10--300 K. Calculation results demonstrate that combining the In-graded QWs with thinner barriers effectively increases the IQE by reducing the polarization field of the InGaN/GaN QWs.
- 2013-08-25
著者
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LIU Wei
School of Electronic, Information and Electrical Engineering, Shanghai Jiao Tong University
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Liu Wei-Cui
School of Physics and Mechanical and Electrical Engineering, Xiamen University, Xiamen 361005, People's Republic of China
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Li Xiao-Ying
School of Physics and Mechanical and Electrical Engineering, Xiamen University, Xiamen 361005, People's Republic of China
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Liu Bao-Lin
School of Physics and Mechanical and Electrical Engineering, Xiamen University, Xiamen 361005, People's Republic of China
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Zhu Li-Hong
School of Physics and Mechanical and Electrical Engineering, Xiamen University, Xiamen 361005, People's Republic of China
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Zeng Fan-Ming
School of Physics and Mechanical and Electrical Engineering, Xiamen University, Xiamen 361005, People's Republic of China
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Zhang Ling
School of Physics and Mechanical and Electrical Engineering, Xiamen University, Xiamen 361005, People's Republic of China
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Feng Zhe-Chuan
Department of Electrical Engineering and Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 106-17, Taiwan, Republic of China
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Zhang Ling
School of Physics and Mechanical and Electrical Engineering, Xiamen University, Xiamen 361005, People's Republic of China
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Liu Wei
School of Aeronautics and Astronautics, Shanghai Jiao Tong University
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Zeng Fan-Ming
School of Physics and Mechanical and Electrical Engineering, Xiamen University, Xiamen 361005, People's Republic of China
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ZHANG Ling
School of Physics and Mechanical and Electrical Engineering, Xiamen University
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ZHU Li-Hong
School of Physics and Mechanical and Electrical Engineering, Xiamen University
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LI Xiao-Ying
School of Physics and Mechanical and Electrical Engineering, Xiamen University
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