The Growth of CuGaTe2 Thin Films by Two-Step Closed Space Sublimation

Research output: Contribution to journalArticle

Abstract

CuGaTe2 layers are successfully grown on Si (001) and Mo/quartz substrates using two-step closed space sublimation (CSS). The surface morphology of the Cu2Te first layer is affected by the surface free energy of the different substrates. Cu2Te grown on Si (001) comprises hexagonal islands which are highly oriented to the (0001). Conversely, Cu2Te layers formed on Mo/quartz substrates forms a thin film. The surface morphology and the quality of the crystals in the CuGaTe2 layers are investigated. Overgrowth by CuGaTe2 of the Cu2Te islands on Si substrates is confined to the islands only and there is no nucleation on the bare substrate. On the contrary, overgrowth by CuGaTe2 on the continuous Cu2Te films on Mo/quartz substrates produces continuous thin films. Therefore, the surface morphology of the CuGaTe2 layers can be controlled by changing the substrate material because they have different surface free energies.

Original languageEnglish
Article number1800883
JournalPhysica Status Solidi (A) Applications and Materials Science
DOIs
Publication statusPublished - 2019 Jan 1

Keywords

  • chalcopyrite
  • closed space sublimation
  • wettability

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Electrical and Electronic Engineering
  • Materials Chemistry

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