Highly controllable ambient atmosphere spray deposition of water dispersible poly(benzimidazobenzophenanthroline) films

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http://hdl.handle.net/10138/326992

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Salomäki , M , Jaakkola , O , Hirvonen , S-P , Tenhu , H & Kvarnström , C 2018 , ' Highly controllable ambient atmosphere spray deposition of water dispersible poly(benzimidazobenzophenanthroline) films ' , Synthetic Metals , vol. 245 , pp. 144-150 . https://doi.org/10.1016/j.synthmet.2018.08.022

Title: Highly controllable ambient atmosphere spray deposition of water dispersible poly(benzimidazobenzophenanthroline) films
Author: Salomäki, Mikko; Jaakkola, Oskari; Hirvonen, Sami-Pekka; Tenhu, Heikki; Kvarnström, Carita
Contributor: University of Helsinki, Department of Chemistry
University of Helsinki, Department of Chemistry
Date: 2018-11
Language: eng
Number of pages: 7
Belongs to series: Synthetic Metals
ISSN: 0379-6779
URI: http://hdl.handle.net/10138/326992
Abstract: Thin films of water dispersible poly(ethylene oxide) (PEO) functionalized poly(benzimidazobenzophenanthroline) (BBL) polymers have been prepared by a pulse spray technique on a spinning substrate in ambient atmosphere. The deposition method is advantageous for generating ultra-thin films of nanometer thicknesses. A single spray pulse was found in a reproducible manner to generate a layer of ca. 2 nm thickness. The PEO-chain length in the BBL functionalization had an essential influence on the building mechanism of the films. The polymers functionalized by short PEO chains induced the formation of very smooth films while longer PEO chains induced rough films and notable nanostructuration. The BBL-PEO film deposited using spray pulse deposition was found to be electro- and photoactive. The electron transfer processes observed are slightly different from earlier reported results for similar polymers, which is probably due to the very thin film. The films exhibited photocurrent generation when transformed into conducting form.
Subject: Poly(benzimidazobenzophenanthroline)
Spray deposition
Electroactive films
Photoactive films
ELECTRON-TRANSPORT
POLYMER
TRANSISTORS
BBL
BLENDS
DONOR
CELLS
116 Chemical sciences
114 Physical sciences
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