Van der Waals epitaxy of cadmium telluride thin films on 2D substrates using metalorganic chemical vapor deposition
Loading...
Authors
Mohanty, Dibyajyoti
Issue Date
2018-08
Type
Electronic thesis
Thesis
Thesis
Language
ENG
Keywords
Electrical engineering
Alternative Title
Abstract
Mica is a readily available, low-cost 2D material. We used it as 2D substrate to grow epitaxial CdTe films. The XRD data showed the growth of a single-crystal CdTe film with [111] out-of-plane orientation. The XRD rocking curve was very narrow with FWHM of ~ 0.1o that is comparable to single crystal CdTe grown by conventional epitaxy. The pole figure showed 6 {111} poles from primary and twin domains with very little dispersion in azimuthal direction. EBSD data showed very large tens of microns sized grains and Raman data showed the stoichiometric nature of the film. The ~100 nm film suffered from low lifetime resulting from high surface recombination that can be improved with proper surface passivation. Thus, both mica and graphene provide low-cost ways to grow high quality epitaxial films, that can potentially help to bring down the cost and increase the efficiency at the same time.
Description
August 2018
School of Engineering
School of Engineering
Full Citation
Publisher
Rensselaer Polytechnic Institute, Troy, NY