高等学校化学学报 ›› 2025, Vol. 46 ›› Issue (2): 20240410.doi: 10.7503/cjcu20240410

• 物理化学 • 上一篇    下一篇

GaP/SiH范德华异质结构的可调谐电子和光学特性的第一性原理研究

郭鑫1,2, 马永强1,2, 鲍爱达1,2(), 邓蕊3, 秦丽1,2, 张文琦1,2, 徐厚敦1,2   

  1. 1.中北大学电子测试技术国家重点实验室
    2.仪器科学与动态测试教育部重点实验室,太原 030051
    3.武警工程大学密码工程学院,西安 710086
  • 收稿日期:2024-08-30 出版日期:2025-02-10 发布日期:2024-10-14
  • 通讯作者: 鲍爱达 E-mail:baoaida@126.com
  • 基金资助:
    国家自然科学基金(62204232)

First Principles Study of Tunable Electronic and Optical Properties of GaP/SiH van der Waals Heterostructure

GUO Xin1,2, MA Yongqiang1,2, BAO Aida1,2(), DENG Rui3, QIN Li1,2, ZHANG Wenqi1,2, XU Houdun1,2   

  1. 1.National Key Laboratory for Electronic Measurement Technology
    2.Key Laboratory of Instrument Science & Dynamic Measurement of Ministry of Education,North University of China,Taiyuan 030051,China
    3.College of Cryptography Engineering,Engineering University of PAP,Xi’an 710086,China
  • Received:2024-08-30 Online:2025-02-10 Published:2024-10-14
  • Contact: BAO Aida E-mail:baoaida@126.com
  • Supported by:
    the National Natural Science Foundation of China(62204232)

摘要:

预测并构建了一种Ⅱ型的GaP/SiH异质结构, 并对其结构特性、 电子特性和光学特性进行了研究. 结果表明, 该GaP/SiH异质结构属于典型的Ⅱ型范德华异质结构, 展现出卓越的能量稳定性. GaP/SiH异质结构的带隙为2.24 eV, Ⅱ型能带结构的排列有效抑制了光生载流子的复合. 通过施加不同的双轴应变和垂直应变, 可以对异质结的电子结构进行一定范围内的精确调控. GaP/SiH异质结构在可见光和紫外光区也表现出优异的光吸收性能, 吸收率可达2.34×106 cm-1. GaP/SiH异质结构表现出的优异性能为光电子器件的设计提供了参考.

关键词: 第一性原理, GaP/SiH范德华异质结构, 光吸收

Abstract:

In this study, a type-II GaP/SiH heterostructure was predicted and constructed, with an in-depth investigation into its structural, electronic and optical properties. The research revealed that the GaP/SiH heterostructure was a typical van der Waals heterostructure, exhibiting excellent energy and thermodynamic stability. It had a bandgap of 2.24 eV, and the arrangement of the type-II band structure effectively suppressed the recombination of photogenerated charge carriers. Furthermore, it was found that the electronic structure of the heterojunction can be precisely modulated within a certain range by applying different biaxial and uniaxial strains. The GaP/SiH heterostructure also demonstrated excellent light absorption performance in the visible and ultraviolet regions, with an absorption coefficient reaching up to 2.34×106 cm-1. The outstanding performance exhibited by the GaP/SiH heterostructure provides a reference for the design of optoelectronic devices.

Key words: First principle, GaP/SiH van der Waals heterostructure, Optical absorption

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