Point defects: key issues for -oxides wide-bandgap semiconductors development

doi:10.7498/aps.68.20191043

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	Point defects: key issues for -oxides wide-bandgap semiconductors development
	X.-H.Xie; B.-H.Li; Z.-Z.Zhang; L.Liu; K.-W.Liu; C.-X.Shan
	2019
发表期刊	Wuli Xuebao/Acta Physica Sinica
ISSN	10003290
卷号	68 期号:16
摘要	-oxides wide-bandgap semiconductor, including the beryllium oxide (BeO), magnesium oxide (MgO), zinc oxide (ZnO), have large exciton binding energy (ZnO 60 meV, MgO 80 meV), high optical gain (ZnO 300 cm-1) and wide tunable band gap (3.37 eV ZnO, MgO 7.8 eV, BeO 10.6 eV), which are the advantages of achieving low-threshold laser devices in the ultraviolet wavelength. It is also one of the important candidates to replace the traditional gas arc lamp (such as mercury lamp, deuterium lamp, excimer lamp, xenon lamp etc.) as the source of deep ultraviolet and even vacuum ultraviolet. Although, during the past decades, the ZnO-based pn homojunction devices have made great progress in the near-UV electroluminescence, but as the band gap broadens, the acceptor (or donor) ionization energy becomes higher (On the order of hundreds meV), which causing the room temperature equivalent thermal energy (26 meV) cannot make the impurities ionizing effectively. In addition, the self-compensation effect in the doping process further weakens the carrier yield. These above drawbacks have become the bottleneck that hinders -oxides wide-bandgap semiconductor from achieving ultraviolet laser devices and expanding to shorter wavelengths, and are also a common problem faced by other wide-bandgap semiconductor materials. The regulation of the electrical and luminescent properties of materials often depends on the control of critical defect states. The rich point defects and their combination types make the -oxides wide-bandgap semiconductors an important platform for studying defect physics. For the identification and characterization of specific point defects, it is expected to discover and further construct shallower defect states, which will provide a basis for the regulation of electrical performance. In this paper, recent research results of -oxides wide-bandgap semiconductors will be described from three aspects: high-quality epitaxial growth, impurity and point defects, p-type doping and ultraviolet electroluminescence. Through the overview of related research works, -oxides wide-bandgap semiconductors are clarified as deep ultraviolet light sources materials. Meanwhile, indicates that the key to the regulation of electrical performance in the future lies in the regulation of point defects. 2019 Chinese Physical Society.
关键词	Wide band gap semiconductors,Arc lamps,Beryllia,Binding energy,Doping (additives),Electroluminescence,Energy gap,II-VI semiconductors,Ionization of gases,Ionization potential,Magnesia,Magnetic semiconductors,Point defects,Semiconductor doping,Semiconductor lasers,Semiconductor quantum wells,Ultraviolet lasers,Zinc oxide
DOI	10.7498/aps.68.20191043
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收录类别	SCI ; EI
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/62926
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	X.-H.Xie,B.-H.Li,Z.-Z.Zhang,et al. Point defects: key issues for -oxides wide-bandgap semiconductors development[J]. Wuli Xuebao/Acta Physica Sinica,2019,68(16).
APA	X.-H.Xie,B.-H.Li,Z.-Z.Zhang,L.Liu,K.-W.Liu,&C.-X.Shan.(2019).Point defects: key issues for -oxides wide-bandgap semiconductors development.Wuli Xuebao/Acta Physica Sinica,68(16).
MLA	X.-H.Xie,et al."Point defects: key issues for -oxides wide-bandgap semiconductors development".Wuli Xuebao/Acta Physica Sinica 68.16(2019).

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