Coplanar MoS2–MoTe2 Heterojunction With the Same Crystal Orientation
Two‐dimensional (2D) coplanar heterostructure enables high‐performance optoelectronic devices, such as p–n heterojunctions. However, realizing site‐controllable and shape‐specific 2D coplanar heterojunctions composed of two semiconductors with the same crystal orientation still requires the developm...
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Published in | Small (Weinheim an der Bergstrasse, Germany) Vol. 20; no. 24; pp. e2308635 - n/a |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Weinheim
Wiley Subscription Services, Inc
01.06.2024
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Subjects | |
Online Access | Get full text |
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Summary: | Two‐dimensional (2D) coplanar heterostructure enables high‐performance optoelectronic devices, such as p–n heterojunctions. However, realizing site‐controllable and shape‐specific 2D coplanar heterojunctions composed of two semiconductors with the same crystal orientation still requires the development of new growth methods. Here, a route to fabricate MoS2–MoTe2 coplanar heterojunctions with the same crystal orientation is reported by exploiting the properties of phase transition and atomic rearrangement during the growth of 2H‐MoTe2. Raman spectroscopy and electron microscopy techniques reveal the chemical composition and lattice structure of the heterostructure. Both MoS2 and MoTe2 in the heterojunction are single crystals and have the same lattice orientation, and their shapes can be arbitrarily defined by electron beam lithography. Electrical measurements show that the MoS2 and MoTe2 channels exhibit n‐type and p‐type transfer characteristics, respectively. The coplanar epitaxy technology can be used to prepare more coplanar heterostructures with novel device functions.
This work demonstrated a method for coplanar epitaxial growth of single crystals of arbitrarily shaped 2H‐MoTe2 on the etched edges of MoS2 to obtain coplanar MoS2−MoTe2 heterostructures with the same crystal orientation. Furthermore, scanning transmission electron microscopy and fast Fourier transform indicate that MoTe2 inherits the crystal orientation of MoS2 and is seamlessly stitched with it. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1613-6810 1613-6829 |
DOI: | 10.1002/smll.202308635 |