Post-growth CdCl2 treatment on CdTe thin films grown on graphene layers using a close-spaced sublimation method

Younghun Jung, Gwangseok Yang, Seungju Chun, Donghwan Kim, Jihyun Kim

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We investigated the morphological, structural and optical properties of CdCl2-treated cadmium telluride (CdTe) thin films deposited on defective graphene using a close-spaced sublimation (CSS) system. Heat treatment in the presence of CdCl2 caused recrystallization of CSS-grown CdTe over the as-deposited structures. The preferential (111) orientation of as-deposited CdTe films was randomized after post-growth CdCl2 treatment. New small grains (bumps) on the surface of CdCl2-treated CdTe films were ascribed to nucleation of the CdTe grains during the CdCl2 treatment. The properties of as-deposited and CdCl2-treated CdTe films were characterized by room temperature micro-photoluminescence, micro- Raman spectroscopy, scanning electron microscopy, and X-ray diffraction analysis. Our results are useful to demonstrate a substrate configuration CdTe thin film solar cells.

Original languageEnglish
Pages (from-to)A986-A991
JournalOptics Express
Volume22
Issue numberSUPPL. 3
DOIs
Publication statusPublished - 2014

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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