Field Effect Tuning of Electrical and Optical Properties of Chemical Vapor Deposition Grown WS2

Mutter, T.T.J. (2016) Field Effect Tuning of Electrical and Optical Properties of Chemical Vapor Deposition Grown WS2. Bachelor's Thesis, Physics.

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Abstract

Monolayer WS2 is a direct bandgap semiconductor existing of one layer of WS2 molecules. This paper presents WS2 grown by chemical vapor deposition using two different methods and a comparison of these methods is given. The asgrown WS2 will be used to produce a field effect transistor. It is found that photoluminescence intensity gives an indication of doping level and type of major dopands. Tuning the fermi level using a backgate can be used to determine the kind of doping. Subsequently a liquid ion gate is applied to inspect the complete PL dependancy on the gate voltage. The profiles are reasonably symmetric in accordance with theory. Different PL maxima are observed in different locations of the same flake.

Item Type:	Thesis (Bachelor's Thesis)
Degree programme:	Physics
Thesis type:	Bachelor's Thesis
Language:	English
Date Deposited:	15 Feb 2018 08:25
Last Modified:	15 Feb 2018 08:25
URI:	https://fse.studenttheses.ub.rug.nl/id/eprint/14541

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