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

Flexible nanogap polymer light-emitting diodes fabricated via adhesion lithography (a-Lith)
Flexible nanogap polymer light-emitting diodes fabricated via adhesion lithography (a-Lith)
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.
01LT01
Wyatt-moon, Gwenhivir
f332707a-2026-406a-b32e-2a29d9cf6423
Georgiadou, Dimitra G
84977176-3678-4fb3-a3dd-2044a49c853b
Zoladek-lemanczyk, Alina
a848fca6-2e3f-4ef3-9293-bbd07cf1f68a
Castro, Fernando A
8a8819b3-9708-4035-88e3-d0b1f775c7b1
Anthopoulos, Thomas D
d6ee9390-d991-4277-a721-030f22d614c9
Wyatt-moon, Gwenhivir
f332707a-2026-406a-b32e-2a29d9cf6423
Georgiadou, Dimitra G
84977176-3678-4fb3-a3dd-2044a49c853b
Zoladek-lemanczyk, Alina
a848fca6-2e3f-4ef3-9293-bbd07cf1f68a
Castro, Fernando A
8a8819b3-9708-4035-88e3-d0b1f775c7b1
Anthopoulos, Thomas D
d6ee9390-d991-4277-a721-030f22d614c9

Wyatt-moon, Gwenhivir, Georgiadou, Dimitra G, Zoladek-lemanczyk, Alina, Castro, Fernando A and Anthopoulos, Thomas D (2018) Flexible nanogap polymer light-emitting diodes fabricated via adhesion lithography (a-Lith). Journal of Physics: Materials, 1 (1), 01LT01. (doi:10.1088/2515-7639/aadd57).

Record type: Letter

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.

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Accepted/In Press date: 29 August 2018
Published date: 17 September 2018

Identifiers

Local EPrints ID: 439811
URI: http://eprints.soton.ac.uk/id/eprint/439811
PURE UUID: 3689fee9-18d1-4974-a99b-17662185503b
ORCID for Dimitra G Georgiadou: ORCID iD orcid.org/0000-0002-2620-3346

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Date deposited: 05 May 2020 16:30
Last modified: 07 Oct 2020 02:27

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Contributors

Author: Gwenhivir Wyatt-moon
Author: Alina Zoladek-lemanczyk
Author: Fernando A Castro
Author: Thomas D Anthopoulos

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