Please use this identifier to cite or link to this item: doi:10.22028/D291-29309
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Title: Growth, morphology and structure of mixed pentacene films
Author(s): Lubert-Perquel, Daphné
Kim, Dong Kuk
Robaschik, Peter
Kay, Christopher
Heutz, Sandrine
Language: English
Title: Journal of materials chemistry
Volume: 7
Issue: 2
Startpage: 289
Endpage: 296
Publisher/Platform: RSC
Year of Publication: 2019
Publikation type: Journal Article
Abstract: Thin films of pentacene and p-terphenyl were grown via organic molecular beam deposition to enable solid-state dilution of functional molecules (pentacene) in an inert matrix (p-terphenyl) at higher concentrations than permitted by traditional crystal growth methods, such as melts. Growth rates were first optimised for single component films to ensure a precise control over the dopant/host concentrations when the mixed films were deposited. Both thin film and bulk phases can be identified in pentacene growths, with the precise lattice parameters dependent on the deposition rates. The effect on the microstructure, resulting from progressive dilution of pentacene in a p-terphenyl host, was then investigated. Although disorder increases and the crystallite size decreases in the mixture, with a minimum at a 1 : 1 ratio, phase segregation is not observed on the length scale (limit) that can be probed in our measurements. This indicates that the mixed films form homogeneous solid-solutions that may be employed for the investigation of solid-state phenomena. Our methodology can be extended to other compatible host-dopant systems used in optoelectronic and spintronic devices.
DOI of the first publication: 10.1039/C8TC05525D
URL of the first publication:
Link to this record: hdl:20.500.11880/27850
ISSN: 2050-7534
Date of registration: 20-Sep-2019
Faculty: NT - Naturwissenschaftlich- Technische Fakultät
Department: NT - Chemie
Professorship: NT - Prof. Dr. Christopher Kay
Collections:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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