Mechanism of Excellent Photoelectric Characteristics in Mixed-Phase ZnMgO Ultraviolet Photodetectors with Single Cutoff Wavelength

	Mechanism of Excellent Photoelectric Characteristics in Mixed-Phase ZnMgO Ultraviolet Photodetectors with Single Cutoff Wavelength
	Fan, M. M.; K. W. Liu; X. Chen; X. Wang; Z. Z. Zhang; B. H. Li and D. Z. Shen
	2015
发表期刊	Acs Applied Materials & Interfaces
卷号	7 期号:37 页码:20600-20606
摘要	Mixed-phase ZnMgO (m-ZMO) thin films with a single absorption edge tuning from,similar to 3.9 to similar to 4.8 eV were realized on a-face sapphire (a-Al2O3) by plasma-assisted molecular beam epitaxy. The small lattice mismatch of both ZnO and MgO with a-Al2O3 should be responsible for the single and controllable absorption edge. Metal-semiconductor-metal (MSM) photodetectors were fabricated based on these m-ZMO films, and the devices have the single cutoff wavelength, which can be tuned from 335 to 275 nm. These devices possess low dark current (78 pA for m-Z(0.67)M(0.33)O, 11 pA for m-Z(0.59)M(0.41)O, and 4 pA for m-Z(0.39)M(0.61)O at 40 V) and high responsivity (434 A/W for m-Z(0.67)M(0.33)O, 89.8 A/W for m-Z(0.59)M(0.41)O and 3.7 A/W for m-Z(0.39)M(0.61)O at 40 V). Further response study reveals that the 90-10% decay time of m-Z(0.67)M(0.33)O, m-Z(0.59)M(0.41)O, and m-Z(0.39)M(0.61)O is around 37, 30, and 0.7 ms, respectively. Large amounts of heterojunction interfaces between wurtzite ZMO and cubic rock-salt ZMO could be responsible for the low dark current and high responsivity of our mixed-phase devices. The excellent comprehensive performance of m-ZMO UV photodetectors on a-Al2O3 suggests that m-ZMO UV photodetectors should have great applied potential.
收录类别	SCI ; EI
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/55234
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Fan, M. M.,K. W. Liu,X. Chen,et al. Mechanism of Excellent Photoelectric Characteristics in Mixed-Phase ZnMgO Ultraviolet Photodetectors with Single Cutoff Wavelength[J]. Acs Applied Materials & Interfaces,2015,7(37):20600-20606.
APA	Fan, M. M.,K. W. Liu,X. Chen,X. Wang,Z. Z. Zhang,&B. H. Li and D. Z. Shen.(2015).Mechanism of Excellent Photoelectric Characteristics in Mixed-Phase ZnMgO Ultraviolet Photodetectors with Single Cutoff Wavelength.Acs Applied Materials & Interfaces,7(37),20600-20606.
MLA	Fan, M. M.,et al."Mechanism of Excellent Photoelectric Characteristics in Mixed-Phase ZnMgO Ultraviolet Photodetectors with Single Cutoff Wavelength".Acs Applied Materials & Interfaces 7.37(2015):20600-20606.

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