Acta Physica Sinica, Volume. 68, Issue 24, 246301-1(2019)

Properties of vacancies and N-doping in monolayer g-ZnO: First-principles calculation and molecular orbital theory analysis

Bing-Quan Huang1, Tie-Ge Zhou2, Dao-Xiong Wu3, Zhao-Fu Zhang4, and Bai-Kui Li1、*
Author Affiliations
  • 1College of Physics and Optoelectronic Engineeing, Shenzhen University, Shenzhen 518060, China
  • 2College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, China
  • 3Hefei National Laboratory of Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
  • 4Department of Engineering, Cambridge University, Cambridge CB2 1PZ, United Kingdom
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    Figures & Tables(9)
    (a) Atomic structures, (b) band structure and density of states (DOS) of the g-ZnO primitive unit cell. The valence band maximum of g-ZnO is referred to 0 eV.理想g-ZnO的(a)晶体结构以及(b)能带和态密度, 其中g-ZnO价带顶对齐到0 eV
    Atomic structures of the g-ZnO supercells: (a) Ideal g-ZnO; (b) VO_g-ZnO; (c) NO_g-ZnO; (d) N atom at hollow site; (e) N atom on top of Zn atom; (f) N atom on top of O atom.空位及掺杂超胞体系的几何结构示意图 (a) VZn_g-ZnO; (b) VO_g-ZnO; (c) NO_g-ZnO; (d) N原子吸附在六元环中心上方; (e) N原子吸附在Zn原子上方; (f) N原子吸附在O原子上方
    Total density of states and partial density of states: (a) VZn_g-ZnO; (b) VO_g-ZnO; (c) NO_g-ZnO; (d) N@g-ZnO. The valence band maximum of g-ZnO is referred to 0 eV.总态密度和分波态密度 (a) VZn_g-ZnO; (b) VO_g-ZnO; (c) NO_g-ZnO; (d) N@g-ZnO; 其中g-ZnO的价带顶对齐到0 eV
    Band structure of (a) VZn_g-ZnO; (b) VO_g-ZnO; (c) NO_g-ZnO; (d) N@g-ZnO. The valence band maximum of g-ZnO is referred to 0 eV.能带结构 (a) VZn_g-ZnO; (b) VO_g-ZnO; (c) NO_g-ZnO; (d) N@g-ZnO; 其中g-ZnO的价带顶对齐到0 eV
    Molecular orbital diagrams: (a) VZn_g-ZnO supercell, O energy level splitting and electron filling; (b) NO_g-ZnO supercell, p-orbital splitting and electron filling; (c) N@g-ZnO supercell, p-orbital splitting and electron filling.分子轨道 (a) VZn_g-ZnO体系, O能级劈裂及电子填充示意图; (b) NO_g-ZnO体系, p轨道分裂及电子填充示意图; (c) N@g-ZnO体系, p轨道分裂及电子填充示意图
    Spin density of (a) VZn_g-ZnO, (b) VO_g-ZnO, (c) NO_g-ZnO, and (d) N@g-ZnO supercells, respectively. Cyan is spin up and yellow is spin down.自旋密度图, 其中青色区域是自旋向上, 黄色区域是自旋向下 (a) VZn_g-ZnO体系的自旋密度; (b) VO_g-ZnO体系的自旋密度; (c) NO_g-ZnO体系的自旋密度; (d) N@g-ZnO体系的自旋密度
    Optical absorption spectra of ideal g-ZnO and the defective supercell systems.理想g-ZnO及具有空位、掺杂的超胞体系的光学吸收谱
    • Table 1.

      Structure parameters and binding energy of N-doped g-ZnO monolayer.

      N掺杂g-ZnO单层的结构参数和结合能

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      Table 1.

      Structure parameters and binding energy of N-doped g-ZnO monolayer.

      N掺杂g-ZnO单层的结构参数和结合能

      超胞模型hNhZnhOdZn_NdO_NEb/eV
      NO_g-ZnO 0.070.0050.0031.923.31–4.12
      N@g-ZnO2.120.003–0.1042.842.93–0.25
    • Table 2.

      Magnetic moment of N-doped g-ZnO monolayer.

      N掺杂g-ZnO单层的磁矩

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      Table 2.

      Magnetic moment of N-doped g-ZnO monolayer.

      N掺杂g-ZnO单层的磁矩

      超胞模型MtotBMNBMZnBMOB
      VO_g-ZnO 000
      VZn_g-ZnO 2.000.020.45
      NO_g-ZnO 1.000.590.010
      N@g-ZnO3.001.9000.05
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    Bing-Quan Huang, Tie-Ge Zhou, Dao-Xiong Wu, Zhao-Fu Zhang, Bai-Kui Li. Properties of vacancies and N-doping in monolayer g-ZnO: First-principles calculation and molecular orbital theory analysis[J]. Acta Physica Sinica, 2019, 68(24): 246301-1

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    Paper Information

    Received: Aug. 20, 2019

    Accepted: --

    Published Online: Sep. 17, 2020

    The Author Email:

    DOI:10.7498/aps.68.20191258

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