中国物理B ›› 2019, Vol. 28 ›› Issue (1): 16105-016105.doi: 10.1088/1674-1056/28/1/016105

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Versatile GaInO3-sheet with strain-tunable electronic structure, excellent mechanical flexibility, and an ideal gap for photovoltaics

Hui Du(杜慧), Shijie Liu(刘世杰), Guoling Li(李国岭), Liben Li(李立本), Xueshen Liu(刘学深), Bingbing Liu(刘冰冰)   

  1. 1 School of Physics and Engineering, and Henan Key Laboratory of Photoelectric Energy Storage Materials and Applications, Henan University of Science and Technology, Luoyang 471003, China;
    2 Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China;
    3 State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China
  • 收稿日期:2018-08-29 修回日期:2018-10-31 发布日期:2019-01-25
  • 通讯作者: Guoling Li, Xueshen Liu, Bingbing Liu E-mail:liguoling@dicp.ac.cn;liuxs@jlu.edu.cn;liubb@jlu.edu.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11847094, 61764001, and U1404212), the Cheung Kong Scholars Programme of China, the Program of Changjiang Scholars and Innovative Research Team in University, China (Grant No. IRT1132), and Open Project of State Key Laboratory of Superhard Materials (Jilin University), China (Grant No. 201703).We acknowledge the use of computing facilities at the High Performance Computing Center of Jilin University.

Versatile GaInO3-sheet with strain-tunable electronic structure, excellent mechanical flexibility, and an ideal gap for photovoltaics

Hui Du(杜慧)1,2, Shijie Liu(刘世杰)1,3, Guoling Li(李国岭)1, Liben Li(李立本)1, Xueshen Liu(刘学深)2, Bingbing Liu(刘冰冰)2,3   

  1. 1 School of Physics and Engineering, and Henan Key Laboratory of Photoelectric Energy Storage Materials and Applications, Henan University of Science and Technology, Luoyang 471003, China;
    2 Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China;
    3 State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China
  • Received:2018-08-29 Revised:2018-10-31 Published:2019-01-25
  • Contact: Guoling Li, Xueshen Liu, Bingbing Liu E-mail:liguoling@dicp.ac.cn;liuxs@jlu.edu.cn;liubb@jlu.edu.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11847094, 61764001, and U1404212), the Cheung Kong Scholars Programme of China, the Program of Changjiang Scholars and Innovative Research Team in University, China (Grant No. IRT1132), and Open Project of State Key Laboratory of Superhard Materials (Jilin University), China (Grant No. 201703).We acknowledge the use of computing facilities at the High Performance Computing Center of Jilin University.

摘要:

Due to many remarkable physical and chemical properties, two-dimensional (2D) nanomaterials have become a hot spot in the field of condensed matter physics. In this paper, we have studied the structural, mechanical, and electronic properties of the 2D GaInO3 system by first-principles method. We find that 2D GaInO3 can exist stably at ambient condition. Molecular dynamic simulations show that GaInO3-sheet has excellent thermal stability and is stable up to 1100 K. Electronic structural calculations show that GaInO3-sheet has a band gap of 1.56 eV, which is close to the ideal band gap of solar cell materials, demonstrating great potential in future photovoltaic application. In addition, strain effect studies show that the GaInO3-sheet structure always exhibits a direct band gap under biaxial compressive strain, and as the biaxial compressive strain increases, the band gap gradually decreases until it is converted into metal. While biaxial tensile strain can cause the 2D material to transform from a direct band gap semiconductor into an indirect band gap semiconductor, and even to metal. Our research expands the application of the GaInO3 system, which may have potential application value in electronic devices and solar energy.

关键词: two-dimensional (2D) material, GaInO3-sheet, first-principles method, strain effect

Abstract:

Due to many remarkable physical and chemical properties, two-dimensional (2D) nanomaterials have become a hot spot in the field of condensed matter physics. In this paper, we have studied the structural, mechanical, and electronic properties of the 2D GaInO3 system by first-principles method. We find that 2D GaInO3 can exist stably at ambient condition. Molecular dynamic simulations show that GaInO3-sheet has excellent thermal stability and is stable up to 1100 K. Electronic structural calculations show that GaInO3-sheet has a band gap of 1.56 eV, which is close to the ideal band gap of solar cell materials, demonstrating great potential in future photovoltaic application. In addition, strain effect studies show that the GaInO3-sheet structure always exhibits a direct band gap under biaxial compressive strain, and as the biaxial compressive strain increases, the band gap gradually decreases until it is converted into metal. While biaxial tensile strain can cause the 2D material to transform from a direct band gap semiconductor into an indirect band gap semiconductor, and even to metal. Our research expands the application of the GaInO3 system, which may have potential application value in electronic devices and solar energy.

Key words: two-dimensional (2D) material, GaInO3-sheet, first-principles method, strain effect

中图分类号:  (Structure of nanoscale materials)

  • 61.46.-w
61.50.Ah (Theory of crystal structure, crystal symmetry; calculations and modeling) 61.82.Fk (Semiconductors) 62.23.Kn (Nanosheets)