Spin-coating of Ge23Sb7S70 chalcogenide glass thin films

Shanshan Song, Nathan Carlie, Julie Boudies, Laeticia Petit, Kathleen Richardson, Craig B. Arnold

Research output: Contribution to journalArticle

49 Scopus citations

Abstract

Thin film Ge23Sb7S70 chalcogenide glass has emerged as an important material system for photonic applications due to its high non-linear refractive index. However, one of the challenges is developing low-cost methods to deposit films of glassy material while retaining glass stoichiometry and high film quality. In this paper, we demonstrate a spin-coating technique for the deposition of such films. The dissolution mechanisms of Ge23Sb7S70 in different solvents are studied in order to select the optimal solvent for film deposition. We show that the use of amine-based solvents allow the deposition of stoichiometric films in contrast to alkaline solutions. Films with low surface roughness (RMS roughness <5 nm) and controlled thickness (100-600 nm) can be deposited from solutions. We also show that annealing the films in vacuum decreases the amount of residual solvent, the presence of which is expected to lead to variation in optical properties of the thin films.

Original languageEnglish (US)
Pages (from-to)2272-2278
Number of pages7
JournalJournal of Non-Crystalline Solids
Volume355
Issue number45-47
DOIs
StatePublished - Nov 1 2009

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

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