Enhanced optical emission at MoS2-WS2 heterostructure interface with n-N junction

Thakur, Deepa and Sato, Yukio and Sabarigresan, M. and Ramadurai, Ranjith and et al, . (2022) Enhanced optical emission at MoS2-WS2 heterostructure interface with n-N junction. Applied Surface Science, 606. pp. 1-9. ISSN 0169-4332

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Abstract

Atomically thin transition metal dichalcogenide based heterostructures are of significant interest for the elec-tronic and optoelectronic device applications. Growth of atomically thin heterostructures have gained remark-able importance due to the unusual electrical response and optical emission at the interface. Here, facile chemical vapour deposition growth of n -N type MoS2-WS2 heterostructure is demonstrated. Multifold enhancement in photoluminescence emission at the interface of MoS2-WS2 heterostructure with local excitonic amplifications arising at the interface is observed. The atomic level structure of interface has been investigated with the aid of aberration corrected scanning transmission electron microscopy. Electrical properties of MoS2-WS2 hetero-structure with n -N semiconductor junction are systematically probed using micromanipulators interfaced with scanning electron microscope. Our microscopic and spectroscopic investigations along with electrical and optical responses at the interface contribute to the fundamental knowledge to empower the development of optical devices based on two dimensional heterostructures with enhanced emissions.

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IITH Creators:

IITH Creators	ORCiD
Ramadurai, Ranjit	http://orcid.org/0000-0003-2991-0027

Item Type:

Article

Additional Information:

We would like to thank Ministry of Science and Technology, Department of Science and Technology (DST) , Govt. of India and Japan Society for Promotion of Science (JSPS) for providing financial support (Grant No.: DST/INT/JSPS/P-289/2019 and JPJSBP120197724) . We acknowledge Advanced Material Research Centre (AMRC) , and Centre for design and fabrication of electronic devices (C4DFED) , IIT Mandi and The Ultramicroscopy Research Center, Kyushu University, Japan for sophisticated instruments facility. We are highly thankful to DST-INSPIRE [Innovation in Science Pursuit for Inspired Research, IF-180717] for providing doctorial fellowship to Deepa Thakur. We also acknowledge Dr. Pawan Kumar, Dr. Rahul Sharma and Arjun Barwal for scientific discussion.

Uncontrolled Keywords:

GROWTH,WS2,PHOTOLUMINESCENCE,WSE2

Subjects:

Materials Engineering > Materials engineering

Divisions:

Department of Material Science Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

12 Nov 2022 12:22

Last Modified:

12 Nov 2022 12:22