Chem. J. Chinese Universities ›› 2025, Vol. 46 ›› Issue (2): 20240410.doi: 10.7503/cjcu20240410

• Physical Chemistry • Previous Articles     Next Articles

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)

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

CLC Number: 

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