Abstract
This paper presents a first-principles approach to the quasiparticle electronic structure, exciton, and optical properties in two dimensional Hittorf's phosphorene. The authors show the onset of exciton-enhanced optical absorption and strong polarization-dependent electron-hole excitation.
Highlights
Since the discovery of graphene, two-dimensional (2D) materials have attracted intense interest in photonics and optoelectronics [1,2,3]
In this paper, based on accurate ab initio GW -BSE (Bethe-Salpeter equation) method, we have studied the quasiparticle electronic structure, exciton, and optical properties of 2D Hittorf’s phosphorene
The multilayer system as well as bulk are indirect-bandgap semiconductors. These findings indicate that the single layer of Hittorf’s phosphorene with a direct band gap and unusual optical properties could play an important role in optoelectronics
Summary
Since the discovery of graphene, two-dimensional (2D) materials have attracted intense interest in photonics and optoelectronics [1,2,3]. Compared with traditional electronic and photonic materials, 2D materials exhibit many advantages. Their surfaces are naturally passivated without any dangling bonds, making it easier to integrate them with current electronic and photonic devices without conventional lattice mismatch problems. The strong electron-hole interaction, on the other hand, leads to strong light-matter interaction, and, despite being atomically thin, most 2D materials absorb photons strongly [4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23].
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