Presentation Title

2D WSe2 Synthesis and Characterization on Patterned Substrates

Faculty Mentor

Ludwig Bartels

Start Date

18-11-2017 2:00 PM

End Date

18-11-2017 2:15 PM

Location

9-247

Session

Engineering/CS 3

Type of Presentation

Oral Talk

Subject Area

engineering_computer_science

Abstract

Two-dimensional transition metal dichalcogenides (TMDs) are of interest due to their unique optical and electronic characteristics in the single layer. In order to optimize the electrical properties of these materials, a method to overcome a substantial Schottky-barrier in these single layer materials must be utilized, while maintaining their 2D optical properties. One such method to do so is by creating contacts of multilayer TMD materials with a 2D channel. Such an architecture can be achieved via chemical vapor deposition (CVD) growth over lithographically-patterned substrates. My work investigates the growth of WSe2, a native p-type material, over patterned SiO2 of different arrangements as to tune the channel length between WSe2 monolayer islands. Using the substrate as a template removes the need for post-growth modification of the material, allowing for optimal preservation of the naturally grown film characteristics. These films are then characterized with a variety of optical techniques, such as Raman and photoluminescence spectroscopy, as well as electrical transport measurements.

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Nov 18th, 2:00 PM Nov 18th, 2:15 PM

2D WSe2 Synthesis and Characterization on Patterned Substrates

9-247

Two-dimensional transition metal dichalcogenides (TMDs) are of interest due to their unique optical and electronic characteristics in the single layer. In order to optimize the electrical properties of these materials, a method to overcome a substantial Schottky-barrier in these single layer materials must be utilized, while maintaining their 2D optical properties. One such method to do so is by creating contacts of multilayer TMD materials with a 2D channel. Such an architecture can be achieved via chemical vapor deposition (CVD) growth over lithographically-patterned substrates. My work investigates the growth of WSe2, a native p-type material, over patterned SiO2 of different arrangements as to tune the channel length between WSe2 monolayer islands. Using the substrate as a template removes the need for post-growth modification of the material, allowing for optimal preservation of the naturally grown film characteristics. These films are then characterized with a variety of optical techniques, such as Raman and photoluminescence spectroscopy, as well as electrical transport measurements.