Keywords: unipolar barrier structure, mixed-dimensional de- vice, WS2/WSe2/p-Si heterojunctions, photodetector, dark cur- rent suppression INTRODUCTION Due to their distinctive properties, including strong light-matter coupling [1,2], tunable band structure [3–5], self-passivated surface [6,7],...
Here, various perturbative corrections to the DFT electronic structure, e.g. GW, spin-orbit coupling, as well as many-body excitonic and trionic effects are considered, and accurate band gaps as a function of homogeneous biaxial strain in these materials are calculated. All of these corrections...
can be observed even among the as-deposited samples despite the varying Fig. 6, the major PL peak at ~640 nm quickly diminishes in intensity and gcroandcueanltlyrarteiodn-sshoiffts1Tw-iWth Sin2.cAresassihnogwlanyienr thickness, a trend that has been observed by other groups12,22,...
The saturable intensity is about 0.6 GW/cm2, which is much larger than that of the graphene5 or carbon nanotube30. The second SA is based on WS2-PVA film, and the fabrication process can be described as follows. The as-prepared WS2 solution is ultra-sonicated for 1-hour using a 300 ...
calculated the band gap value of 2D-WS2 (Eg=1.819 eV) using PBE functional and (Eg=1.999 eV) using LDA functional [36]. Xie et al. calculate the band gap value of pure monolayer WS2 (Eg=1.82 eV) using GGA-PBE method [37]. Ding et al. used PBE, LDA, HSE and GW functions to ...
& Gwag, J. S. Electronic and optical properties of Nb/V-doped WS2 monolayer: a first-principles study. Luminescence 38, 1215–1220 (2023). CAS Google Scholar Qin, Z. et al. Growth of Nb-doped monolayer WS2 from liquid-phase precursor mixing. ACS Nano 13, 10768–10775 (2019). ...
Solid State Phenom 37:479 Liang CH, Meng GW, Lei Y, Phillipp F, Zhang LD (2001) Catalytic growth of semiconducting In2O3 nanofibers. Adv Mater 13:1330 Martin-Litas I, Vinatier P, Levasseur A, Dupin JC, Gonbeau D (1999) XPS analysis of the lithium intercalation in amorphous tungsten...
To study opto-electronic features of WS2, we solve the Bethe-Salpeter-Equation (BSE) on top of the standard self consistentGWquasiparticle (QP) calculations. These calculations capture the excitonic effects which originate near the edge of conduction band, shows good agreement with the available ...
and WSe2 Fang Wang, Junyong Wang, Shuang Guo, Jinzhong Zhang, Zhigao Hu & Junhao Chu The interlayer interaction of vertically stacked heterojunctions is very sensitive to the interlayer spacing, which will affect the coupling between the monolayers and allow band structure modulation....
For the resulting recombination line of such semi-dark complexes, we find that it is shifted downwards in energy (relative to the ( )bbyrigsWphitintth,riσtoh =ne l↑rine, f↓ee)rabennydc2evΔatolSlOeF,yit,gwτ. i 1=c,e tKthh,eKebc′a-qsbuias...