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题名: Influence of Mg content on molecular-beam-epitaxy-grown ZnMgS ultraviolet photodetectors
作者: Lu, LW;  Sou, IK;  Ge, WK
发表日期: 2004
摘要: Zn1-xMgxS-based Schottky barrier ultraviolet (UV) photodetectors were fabricated using the molecular-beam-epitaxy (MBE) technique. The influence of Mg content on MBE-grown Zn1-xMgxS-based UV photodetectors has been investigated in details with a variety of experimental techniques, including photoresponse (PR), capacitance-voltage, deep level transient Fourier spectroscopy (DLTFS) and photoluminescence (PL). The room-temperature PR results show that the abrupt long-wavelength cutoffs covering 325, 305 295. and 270 nm with Mg contents of 16%, 44%, 57%, and 75% in the Zn1-xMgxS active layers, respectively, were achieved. But the responsivity and the external quantum efficiency exhibited a slight decrease with the Mg content increasing. In good agreement with the PR results, both of the integrated intensity of the PL spectra obtained from Zn1-xMgxS thin films with different Mg compositions (x = 31% and 52%, respectively) and the DLTFS spectra obtained from Zn1-xMgxS-based (x = 5% and 45%, respectively) UV photodetector samples clearly revealed a significant concentration increase of the non-radiative deep traps with increasing Mg containing in the ZnMgS active layers. Our experimental results also indicate that the MBE-grown ZnMgS-based photodetectors can offer the promising characteristics for the detection of short-wavelength UV radiation. (C) 2004 Elsevier B.V. All rights reserved.
KOS主题词: characterization
刊名: JOURNAL OF CRYSTAL GROWTH
专题: 中国科学院半导体研究所(2009年前)_期刊论文

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推荐引用方式:
Lu, LW; Sou, IK; Ge, WK .Influence of Mg content on molecular-beam-epitaxy-grown ZnMgS ultraviolet photodetectors ,JOURNAL OF CRYSTAL GROWTH,APR 15 2004,265 (1-2):28-33
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