中国物理B ›› 2022, Vol. 31 ›› Issue (6): 66205-066205.doi: 10.1088/1674-1056/ac4cbe

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Bandgap evolution of Mg3N2 under pressure: Experimental and theoretical studies

Gang Wu(吴刚)1,†, Lu Wang(王璐)3, Kuo Bao(包括)2, Xianli Li(李贤丽)1, Sheng Wang(王升)1, and Chunhong Xu(徐春红)1   

  1. 1 School of Physics and Electronic Engineering, Northeast Petroleum University, Daqing 163318, China;
    2 State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China;
    3 Institute of Unconventional Oil&Gas, Northeast Petroleum University, Daqing 163318, China
  • 收稿日期:2021-11-29 修回日期:2022-01-13 接受日期:2022-01-19 出版日期:2022-05-17 发布日期:2022-06-06
  • 通讯作者: Gang Wu E-mail:wugang614@163.com
  • 基金资助:
    Project supported by the Open Project of State Key Laboratory of Superhard Materials, Jilin University (Grant No. 202102) and Young Science Foundation of Northeast Petroleum University (Grant No. 2018QNL-53).

Bandgap evolution of Mg3N2 under pressure: Experimental and theoretical studies

Gang Wu(吴刚)1,†, Lu Wang(王璐)3, Kuo Bao(包括)2, Xianli Li(李贤丽)1, Sheng Wang(王升)1, and Chunhong Xu(徐春红)1   

  1. 1 School of Physics and Electronic Engineering, Northeast Petroleum University, Daqing 163318, China;
    2 State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China;
    3 Institute of Unconventional Oil&Gas, Northeast Petroleum University, Daqing 163318, China
  • Received:2021-11-29 Revised:2022-01-13 Accepted:2022-01-19 Online:2022-05-17 Published:2022-06-06
  • Contact: Gang Wu E-mail:wugang614@163.com
  • Supported by:
    Project supported by the Open Project of State Key Laboratory of Superhard Materials, Jilin University (Grant No. 202102) and Young Science Foundation of Northeast Petroleum University (Grant No. 2018QNL-53).

摘要: Wide bandgap semiconductors are crucially significant for optoelectronic and thermoelectric device applications. Metal nitride is a class of semiconductor material with great potential. Under high pressure, the bandgap of magnesium nitride was predicted to grow. Raman spectra, ultra-violet-visible (UV-Vis) absorption spectra, and first-principles calculations were employed in this study to analyze the bandgap evolution of Mg3N2. The widening of the bandgap has been first detected experimentally, with the gap increasing from 2.05 eV at 3 GPa to 2.88 eV at 47 GPa. According to the calculation results, the enhanced covalent component is responsible for the bandgap widening.

关键词: high pressure, electronic structures, first-principles calculations, alkaline-earth metal nitride

Abstract: Wide bandgap semiconductors are crucially significant for optoelectronic and thermoelectric device applications. Metal nitride is a class of semiconductor material with great potential. Under high pressure, the bandgap of magnesium nitride was predicted to grow. Raman spectra, ultra-violet-visible (UV-Vis) absorption spectra, and first-principles calculations were employed in this study to analyze the bandgap evolution of Mg3N2. The widening of the bandgap has been first detected experimentally, with the gap increasing from 2.05 eV at 3 GPa to 2.88 eV at 47 GPa. According to the calculation results, the enhanced covalent component is responsible for the bandgap widening.

Key words: high pressure, electronic structures, first-principles calculations, alkaline-earth metal nitride

中图分类号:  (High-pressure effects in solids and liquids)

  • 62.50.-p
71.20.-b (Electron density of states and band structure of crystalline solids) 78.40.-q (Absorption and reflection spectra: visible and ultraviolet) 71.20.Nr (Semiconductor compounds)