UCL logo

UCL Discovery

UCL home » Library Services » Electronic resources » UCL Discovery

Growth, morphology and structure of mixed pentacene films

Lubert-Perquel, D; Kim, DK; Robaschik, P; Kay, CWM; Heutz, S; (2019) Growth, morphology and structure of mixed pentacene films. Journal of Materials Chemistry C , 7 (2) pp. 289-296. 10.1039/c8tc05525d.

[img] Text
Kay_Growth, morphology and structure of mixed pentacene films_template_AAM.pdf - ["content_typename_Accepted version" not defined]
Access restricted to UCL open access staff until 8 December 2019.

Download (1MB)

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.

Type: Article
Title: Growth, morphology and structure of mixed pentacene films
DOI: 10.1039/c8tc05525d
Publisher version: http://dx.doi.org/10.1039/c8tc05525d
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: http://discovery.ucl.ac.uk/id/eprint/10067939
Downloads since deposit
1Download
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item