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Room-temperature direct-bandgap photoluminescence from strain-compensated Ge/SiGe multiple quantum wells on silicon |
Hu Wei-Xuan(胡炜玄), Cheng Bu-Wen(成步文)†, Xue Chun-Lai(薛春来), Zhang Guang-Ze(张广泽), Su Shao-Jian(苏少坚), Zuo Yu-Hua(左玉华), and Wang Qi-Ming(王启明) |
State Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China |
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Abstract Strain-compensated Ge/Si0.15Ge0.85 multiple quantum wells were grown on an Si0.1Ge0.9 virtual substrate using ultrahigh vacuum chemical vapor deposition technology on an n+-Si(001) substrate. Photoluminescence measurements were performed at room temperature, and the quantum confinement effect of the direct-bandgap transitions of a Ge quantum well was observed, which is in good agreement with the calculated results. The luminescence mechanism was discussed by recombination rate analysis and the temperature dependence of the luminescence spectrum.
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Received: 23 March 2011
Revised: 15 September 2011
Accepted manuscript online:
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PACS:
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78.55.-m
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(Photoluminescence, properties and materials)
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73.61.Cw
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(Elemental semiconductors)
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Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61036003, 61176013, 61177038, and 60906035), and the High Technology Research and Development Program of China (Grant No. 2011AA010302). |
Cite this article:
Hu Wei-Xuan(胡炜玄), Cheng Bu-Wen(成步文), Xue Chun-Lai(薛春来), Zhang Guang-Ze(张广泽), Su Shao-Jian(苏少坚), Zuo Yu-Hua(左玉华), and Wang Qi-Ming(王启明) Room-temperature direct-bandgap photoluminescence from strain-compensated Ge/SiGe multiple quantum wells on silicon 2012 Chin. Phys. B 21 017805
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