TY - JOUR
T1 - Self-Powered Near-Infrared photodetector based on Graphyne/Hexagonal boron phosphide heterostructure with high responsivity and Robustness
T2 - A theoretical study
AU - Zhang, Yanni
AU - Yun, Jiangni
AU - Zhang, Siyu
AU - Zeng, Liru
AU - Bi, Zhisong
AU - Huang, Ningning
AU - Kang, Peng
AU - Yan, Junfeng
AU - Zhao, Wu
AU - Zhang, Zhiyong
AU - Guo, Hong
N1 - Publisher Copyright:
© 2021
PY - 2021/12/15
Y1 - 2021/12/15
N2 - Two-dimensional van der Waals (vdW) heterostructures provide an ideal platform for various optoelectronic applications. However, a weak self-powered near-infrared photoresponsivity limits their applications. Here, a novel self-powered near-infrared photodetector with ultra-broadband, high responsivity, and high robustness based on graphyne/hexagonal boron phosphide (Gyne/BP) heterostructure is proposed by using the first-principles calculation and quantum transport simulations. The self-powered near-infrared Gyne/BP photodetector displays a wideband photoresponsivity from 750 nm to 1500 nm and the maximum photoresponsivity can reach up to 120 mA/W. Revealed by the interfacial properties of Gyne/BP heterostructure, the type-II band alignment, large CBO and VBO, and built-in electric field contribute to the superior photoresponsivity. Surprisingly, such broadband and high self-powered photoresponsivity are robust against external elastic strain by virtue of the robust type-II band alignment, large band offset, and intrinsic built-in electric field in strained Gyne/BP heterostructure. Nonetheless, the compressive strained Gyne/BP photodetector generates superior photoresponsivity compared with unstrained one on account of the enhanced light absorption and smaller effective mass. Our study demonstrates that Gyne/BP vdW heterostructure is a promising candidate for self-powered near-infrared photodetector, and the robustness of the photoelectric properties provides enormous convenience in experimental fabrication.
AB - Two-dimensional van der Waals (vdW) heterostructures provide an ideal platform for various optoelectronic applications. However, a weak self-powered near-infrared photoresponsivity limits their applications. Here, a novel self-powered near-infrared photodetector with ultra-broadband, high responsivity, and high robustness based on graphyne/hexagonal boron phosphide (Gyne/BP) heterostructure is proposed by using the first-principles calculation and quantum transport simulations. The self-powered near-infrared Gyne/BP photodetector displays a wideband photoresponsivity from 750 nm to 1500 nm and the maximum photoresponsivity can reach up to 120 mA/W. Revealed by the interfacial properties of Gyne/BP heterostructure, the type-II band alignment, large CBO and VBO, and built-in electric field contribute to the superior photoresponsivity. Surprisingly, such broadband and high self-powered photoresponsivity are robust against external elastic strain by virtue of the robust type-II band alignment, large band offset, and intrinsic built-in electric field in strained Gyne/BP heterostructure. Nonetheless, the compressive strained Gyne/BP photodetector generates superior photoresponsivity compared with unstrained one on account of the enhanced light absorption and smaller effective mass. Our study demonstrates that Gyne/BP vdW heterostructure is a promising candidate for self-powered near-infrared photodetector, and the robustness of the photoelectric properties provides enormous convenience in experimental fabrication.
KW - Electronic structure
KW - Graphyne/hexagonal boron phosphide heterostructure
KW - Optical absorption
KW - Photoresponsivity
KW - Self-powered near-infrared photodetector
KW - The first-principles calculations
UR - https://www.scopus.com/pages/publications/85114042572
U2 - 10.1016/j.apsusc.2021.151035
DO - 10.1016/j.apsusc.2021.151035
M3 - 文章
AN - SCOPUS:85114042572
SN - 0169-4332
VL - 569
JO - Applied Surface Science
JF - Applied Surface Science
M1 - 151035
ER -