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Strain Enhanced Visible–Ultraviolet Absorption of Blue Phosphorene/MoX 2 (X = S,Se) Heterolayers
Author(s) -
Gu Di,
Tao Xiaoma,
Chen Hongmei,
Ouyang Yifang,
Zhu Weiling,
Peng Qing,
Du Yong
Publication year - 2019
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201800659
Subject(s) - phosphorene , heterojunction , materials science , ultraviolet , optoelectronics , band gap , semiconductor , absorption (acoustics) , visible spectrum , direct and indirect band gaps , composite material
With ultrahigh carrier mobility and large band gap, blue phosphorene (bP) is a promising photoelectronics surpassing black phosphorene and can be further improved by heterostacking. Herein, strain‐engineering of the electronic band gaps and light absorption of two van der Waals heterostructures bP/MoS 2 and bP/MoSe 2 via first‐principles calculations has been reported. Their electronic band structures are sensitive to in‐plane strains. It is interesting and beneficial that biaxial compressive strain range of −0.02 to −0.055 induces the direct band gap in bP/MoSe 2 . There are two critical strains for bP/MoS(Se) 2 heterostructures, where the semiconductor–metal transition can be observed. The bP/MoS(Se) 2 heterostructures exhibit strong visible–ultraviolet light absorption, which can be further enhanced via biaxial strain. Our results suggest that bP/MoS(Se) 2 heterostructures have promising electronics and visible–ultraviolet optoelectronic applications.