Contributions of symmetric metal contacts on liquid exfoliation 2D-MoS2 flakes based MSM photodetector by spray pyrolysis: A CVD-free technique

Document Type

Article

Publication Date

12-1-2022

Abstract

Molybdenum disulphide (MoS2), is a typical layered of transition metal dichalcogenides which has been considered as a strong candidate in many optoelectronic devices due to its layer dependent bandgap and tunability properties. We reported a high yield synthesis of MoS2 flakes prepared using mixed solvent exfoliation followed by feasible and cost-effective spray pyrolysis deposition, in other words; chemical vapor deposition (CVD) free technique. The photodetector based on MoS2 flakes is fabricated using electron beam evaporation (e-beam) with symmetrical metals of Au and Ag contacts. The measurements were carried out under 632 nm illumination at power intensity ranging from 0.792 to 2.537 mW/cm(2). The symmetrical of Au-MoS2/Si-based PD showed the highest photoresponsivity of 128.0 mA/W and specific detectivity of 1.32 x 10(10) Jones. This work demonstrates fecund synthesis of good quality MoS2 flakes and the significance of metal choice in the photodetector as well as Schottky barrier height tuning which a good indicator for enhancing the device performance.

Keywords

MoS2-TMDC, Spray-pyrolysis, Metal-semiconductor-metal (MSM), Photodetector

Publication Title

Optical and Quantum Electronics

Divisions

PHYSICS,photonics

Funders

SATU grant under University Malaya (Grant No: STU048-2021)

Volume

54

Issue

12

Publisher

Springer

Publisher Location

VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS

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