Postannealed Structural Relaxation and Phase Evolution of Quaternary Alloy BeMgZnO

Su, Longxing1; Liu, Qiushi2; Zhu, Yuan3; Tang, Zikang4

2019-10

10.1021/acsaelm.9b00440

ACS Applied Electronic Materials   影响因子和分区

2637-6113

The thermal stability of quaternary alloy BeMgZnO was investigated in this study. When a Be0.09Mg0.19Zn0.72O alloy film was annealed, structural relaxation and reconstruction of the film layers were found at 600, 700, and 800 degrees C. Be atoms were found to gradually diffuse out from the host lattice, and Mg atoms were still maintained. As a result, a mixed-phase alloy containing BeO and MgxZn1-xO was continuously generated. Correspondingly, the bandgap of Be0.09Mg0.19Zn0.72O reduced because of the diffusion of Be atoms. Hence, the thermodynamic solubility of BeO in ZnO and MgO was demonstrated to be relatively low. Additionally, the aging effect caused by a higher annealing temperature is more effective than that caused by a lower annealing temperature for a longer time. Due to the improvement of crystal quality, an MSM interdigital structure photodetector based on the 800 degrees C annealed sample was fabricated and revealed a strong response to the UV light. Our finding provides a new understanding of the ultrawide bandgap quaternary alloy BeMgZnO and contributes to a significant step toward its practical applications.

BeMgZnO thermal annealing structural relaxation Be diffusion bandgap photodetector

ESCI ; EI

英语

通讯

National Natural Science Foundation of China[61705043] ; National Postdoctoral Science Foundation of China[2017M611411][2018T110344] ; Natural Science Foundation of Jiangsu Province[BK20160568]

Engineering ; Materials Science

Engineering, Electrical & Electronic ; Materials Science, Multidisciplinary

WOS:000496316400009

AMER CHEMICAL SOC

20212010361354

Annealing ; Atoms ; Beryllia ; Crystal structure ; Energy gap ; II-VI semiconductors ; Magnesia ; Oxide minerals ; Semiconductor alloys ; Structural relaxation ; Thermodynamic stability ; Zinc alloys ; Zinc oxide

Minerals:482.2 ; Heat Treatment Processes:537.1 ; Magnesium and Alloys:542.2 ; Zinc and Alloys:546.3 ; Thermodynamics:641.1 ; Inorganic Compounds:804.2 ; Classical Physics; Quantum Theory; Relativity:931 ; Crystal Lattice:933.1.1

Web of Science

1.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China
2.Univ Calif Riverside, Bourns Coll Engn, Dept Elect & Comp Engn, Riverside, CA 92521 USA
3.Southern Univ Sci & Technol, Coll Innovat & Entrepreneurship, Shenzhen 518055, Guangdong, Peoples R China
4.Univ Macau, Inst Appl Phys & Mat Engn, Ave Univ, Taipa, Macao, Peoples R China

Su, Longxing,Liu, Qiushi,Zhu, Yuan,et al. Postannealed Structural Relaxation and Phase Evolution of Quaternary Alloy BeMgZnO[J]. ACS Applied Electronic Materials,2019,1(10):2061-2068.

Su, Longxing,Liu, Qiushi,Zhu, Yuan,&Tang, Zikang.(2019).Postannealed Structural Relaxation and Phase Evolution of Quaternary Alloy BeMgZnO.ACS Applied Electronic Materials,1(10),2061-2068.

Su, Longxing,et al."Postannealed Structural Relaxation and Phase Evolution of Quaternary Alloy BeMgZnO".ACS Applied Electronic Materials 1.10(2019):2061-2068.