Macroscopically ordered thin films of an organic salt grown by low-pressure organic vapor-phase deposition

We demonstrate the process of low-pressure organic vapor-phase deposition (LP-OVPD) for the growth of crystalline thin films of the organic charge-transfer salt 4′-dimethylamino-N-methyl-4-stilbazolium tosylate (DAST) on amorphous TiO 2 substrates. LP-OVPD grown films exhibit polycrystallinity with...

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Bibliographic Details
Published in:Journal of crystal growth 1999, Vol.203 (3), p.412-420
Main Authors: Deutsch, M, Gerstenberg, M.C, Gossenberger, H.F, Ban, V.S, Forrest, S.R
Format: Article
Language:English
Subjects:
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Materials science
Methods of deposition of films and coatings
film growth and epitaxy
Nonlinear optical crystals
Optical materials
Optics
Physics
Vapor phase epitaxy
growth from vapor phase
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Summary:We demonstrate the process of low-pressure organic vapor-phase deposition (LP-OVPD) for the growth of crystalline thin films of the organic charge-transfer salt 4′-dimethylamino-N-methyl-4-stilbazolium tosylate (DAST) on amorphous TiO 2 substrates. LP-OVPD grown films exhibit polycrystallinity with long-range structural ordering limited only by substrate size. Film surface coverage and macroscopic ordering are strongly determined by the preparation of the TiO 2 surface prior to growth. The morphology and ordering of the films are also found to depend on the deposition temperature and the composition of the precursor molecules. These results suggest that LP-OVPD films are of sufficient quality for use in optical waveguide and related photonic devices.
ISSN:0022-0248
1873-5002
DOI:10.1016/S0022-0248(99)00080-9