DataVXACS Applied Electronic MaterialsPaper
journal article·2019-10-22

Postannealed Structural Relaxation and Phase Evolution of Quaternary Alloy BeMgZnO

Longxing Su, Qiushi Liu, Yuan Zhu, Zikang Tang

ACS Applied Electronic Materials· Volume 1· Issue 10
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Source abstract

Abstract

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 °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 °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.
Source: openalex_inverted_index · Quality: baseline

Research context

Metals & alloysMaterials processing

OpenAlex topics: ZnO doping and properties · Ga2O3 and related materials · Gas Sensing Nanomaterials and Sensors

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, P. R. China

Department of Electrical and Computer Engineering, Bourns College of Engineering, University of California-Riverside, Riverside 92521, United States

College of Innovation and Entrepreneurship, Southern University of Science and Technology, Shenzhen 518055, P. R. China

Institute of Applied Physics and Materials Engineering, University of Macau, Avenida da Universidade, Taipa, Macau, P. R. China

Funding

China Postdoctoral Science Foundation · Natural Science Foundation of Jiangsu Province · National Natural Science Foundation of China

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