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Structural study of Diketopyrrolopyrrole derivative thin films : influence of deposition method, substrate surface, and aging
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Fynbo, Cecilie, Huss-Hansen, Mathias K., Bikondoa, Oier, Gangadharappa, Chandrasekhar, da Silva Filho, Demetrio Antonio, Patil, Satish, Knaapila, Matti and Kjelstrup-Hansen, Jakob (2023) Structural study of Diketopyrrolopyrrole derivative thin films : influence of deposition method, substrate surface, and aging. Langmuir, 39 (34). pp. 12099-12109. doi:10.1021/acs.langmuir.3c01378 ISSN 1520-5827.
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Official URL: https://doi.org/10.1021/acs.langmuir.3c01378
Abstract
We report the morphology and microstructure of n-dialkyl side-chain-substituted thiophene DPP end-capped with phenyl groups (Ph-TDPP-Ph) thin films and compare the influence of deposition method and substrate surface using thermally oxidized Si and graphene substrates as well as monolayer graphene surfaces with an underlying self-assembled octadecyltrichlorosilane monolayer, complemented by an aging study of spin-coated films over a 2 weeks aging period. A distinct difference in morphology was observed between spin-coated and vacuum-deposited thin films, which formed a fiber-like morphology and a continuous layer of terraced grains, respectively. After an initial film evolution, all combinations of deposition method and substrate type result in well-ordered thin films with almost identical crystalline phases with slight variations in crystallinity and mosaicity. These findings point toward strong intermolecular forces dominating during growth, and the templating effect observed for other oligomer films formed on graphene is consequently ineffective for this material type. Upon aging of spin-coated films, a noticeable evolution involving two different morphologies and crystalline phases were observed. After several days, the thin film evolved into a more stable crystal phase and a fiber-like morphology. Moreover, slight variation in optical spectra were elucidated on the basis on density functional theory calculations. These results demonstrate that thin-film properties of DPP derivatives can be tailored by manipulating the film formation process.
Item Type: | Journal Article | |||||||||
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Alternative Title: | Structural study of DPP derivative thin films | |||||||||
Subjects: | Q Science > QC Physics | |||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | |||||||||
SWORD Depositor: | Library Publications Router | |||||||||
Library of Congress Subject Headings (LCSH): | Organic thin films, Organic thin films -- Microstructure, Organic thin films -- Morphology, Dyes and dyeing, Decomposition method, Graphene | |||||||||
Journal or Publication Title: | Langmuir | |||||||||
Publisher: | American Chemical Society (ACS) | |||||||||
ISSN: | 1520-5827 | |||||||||
Official Date: | 29 August 2023 | |||||||||
Dates: |
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Volume: | 39 | |||||||||
Number: | 34 | |||||||||
Page Range: | pp. 12099-12109 | |||||||||
DOI: | 10.1021/acs.langmuir.3c01378 | |||||||||
Status: | Peer Reviewed | |||||||||
Publication Status: | Published | |||||||||
Reuse Statement (publisher, data, author rights): | This document is the Accepted Manuscript version of a Published Work that appeared in final form in Langmuir, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see [insert ACS Articles on Request author-directed link to Published Work, see ACS Articles on Request ].” | |||||||||
Access rights to Published version: | Restricted or Subscription Access | |||||||||
Copyright Holders: | Copyright © 2023 American Chemical Society | |||||||||
Date of first compliant deposit: | 1 September 2023 | |||||||||
RIOXX Funder/Project Grant: |
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