In this work, WSe2/WS2 heterostructures with type-II band alignment were fabricated for high-performance self-powered photodetector and photovoltaics. Due to the ambipolar nature of WSe2, the junction property could be efficiently modulated with electrostatic doping. Under optimized gate voltage and ...
2-wse2横向异质结制备而言,其需要解决难于控制横向沉积的问题、以及横向沉积过程相互干扰所致的边界不清晰、表面不平滑以及层数无法控制等诸多制备难点。针对该制备难点,本发明经过深入研究发现,预先对wse2进行热处理,随后再在所要求的温差下变温沉积和骤冷处理,能够协同诱导wse2在ws2边缘横向生长,成功制备所述的横向异...
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],...
Uponlight illumination, excess photoexcited electrons are generated anddrift to a WS 2 channel due to the type-II band alignmentat the WS 2 /WSe 2 heterojunction, leaving photoexcitedholes in WSe 2 nanodots. Recirculation of electrons acrossthe WS 2 channel provides a photogain during the life...
Here we investigated interlayer exciton dynamics and transport in WS2–WSe2 heterobilayers in time, space and momentum domains using transient absorption microscopy combined with first-principles calculations. We found that the exciton motion is modulated by twist-angle-dependent moiré potentials around ...
Excitons in a reconstructed moiré potential in twisted WSe2/WSe2 homobilayers Article 04 January 2021 Introduction Atomically thin heterostructures created by stacking van der Waals materials mark a new frontier in condensed matter physics1,2,3. When two monolayer crystals of the same lattice symme...
Tightly bound excitons in monolayer WSe2 Phys. Rev. Lett. (2014)View more references Cited by (8) Interlayer interactions in transition metal dichalcogenides heterostructures 2022, Reviews in Physics Citation Excerpt : TMD heterostructures are formed by combining different kinds of TMD materials with ...
7. Zheng B, Ma C, Li D, et al. Band alignment engineering in two-dimensional lateral heterostructures.Journal of the American Chemical Society,2018, 140(36): 11193-11197. 8. Yang T, Zheng B, Wang Z, et al. Van der Waals epitaxial growth and optoelectronics of large-scale WSe2/SnS2...
WSe2and WS2through second harmonic generation (SHG) measurements (see Supplementary Note1for details). We then mount the SiO2/Si chip on a rotational stage and use hBN as a stamp to pick up each layer sequentially. The alignment of the monolayer WS2and WSe2are controlled by fine adjusting ...
4 Determination of WSe2 and WS2 flake alignment. Polarization-dependent SHG signal on monolayer WSe2 (red circles) and WS2 (black circles) regions of device D1 and corresponding fittings (red and black curves, respectively). Extended Data Fig. 5 ODRC signal for other aligned WSe2/WS2 ...