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Flexible nanogap polymer light-emitting diodes fabricated via adhesion lithography (a-Lith)

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Title: Flexible nanogap polymer light-emitting diodes fabricated via adhesion lithography (a-Lith)
Authors: Wyatt-Moon, G
Georgiadou, DG
Zoladek-Lemanczyk, A
Castro, FA
Anthopoulos, TD
Item Type: Journal Article
Abstract: We report the development of coplanar green colour organic light-emitting diodes (OLEDs) based on asymmetric nanogap electrodes fabricated on different substrates including glass and plastic. Using adhesion lithography (a-Lith) we pattern Al and Au layers acting as the cathode and anode electrodes, respectively, separated by an inter-electrode distance of <15 nm with an aspect ratio of up to 106. Spin-coating the organic light-emitting polymer poly(9,9-dioctylfluorene-alt-bithiophene) (F8T2) on top of the asymmetric Al–Au nanogap electrodes results in green light-emitting nanogap OLEDs with promising operating characteristics. We show that the scaling of the OLED's width from 4 to 200 mm can substantially improve the light output of the device without any adverse effects on the manufacturing yield. Furthermore, it is found that the light-emitting properties in the nanogap area differ from the bulk organic film, an effect attributed to confinement of the conjugated polymer chains in the nanogap channel. These results render a-Lith particularly attractive for low cost facile fabrication of nanoscale light-emitting sources and arrays on different substrates of arbitrary size.
Issue Date: 18-Sep-2018
Date of Acceptance: 29-Aug-2018
URI: http://hdl.handle.net/10044/1/67737
DOI: https://dx.doi.org/10.1088/2515-7639/aadd57
ISSN: 2515-7639
Publisher: IOP Publishing
Journal / Book Title: Journal of Physics: Materials
Volume: 1
Issue: 1
Copyright Statement: © 2018 The Author(s). Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence (https://creativecommons.org/licenses/by/3.0/). Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
Sponsor/Funder: Marie Skłodowska-Curie Actions
Funder's Grant Number: H2020-MSCA-IF-2015
Publication Status: Published
Article Number: 01LT01
Online Publication Date: 2018-09-17
Appears in Collections:Materials
Experimental Solid State
Faculty of Natural Sciences