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Reduced transition metal oxides as electron injection layers in hybrid-PLEDs

Reduced transition metal oxides as electron injection layers in hybrid-PLEDs
Reduced transition metal oxides as electron injection layers in hybrid-PLEDs

Here we report on the improved performance of hybrid polymer light emitting diodes (HyPLEDs) upon inserting an ultra thin layer of partially reduced tungsten oxide (WO2.5) or molybdenum oxide (MoO2.7), deposited (by heating a W or Mo filament while hydrogen was flowing through the chamber) at the polymer/Al cathode interface. Improved current densities, luminances and efficiencies were achieved as a result of improved electron injection and transport at its interface with Al. The observed electron injection improvement is attributed to the lowering of the effective cathode interfacial barrier due to the occupation of gap states with electrons after partial reduction.

Hybrid polymer light emitting diodes, OLEDs, Reduced transition metal oxides, Reduction
0167-9317
59-61
Vasilopoulou, M.
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Georgiadou, D. G.
84977176-3678-4fb3-a3dd-2044a49c853b
Palilis, L. C.
b09e9554-54da-4be5-aa08-bda894e2b86f
Argitis, P.
ab9c4ea6-3dd2-4e34-935d-81bfb360f358
Kennou, S.
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Sygellou, L.
87e6de58-e0d8-46b1-aaa9-0d2150379562
Konofaos, N.
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Iliadis, A.
4009bfb1-8f1d-483a-aa6b-ed81ed539b8c
Kostis, I.
681af9a6-5162-4f35-b6b1-365ea7ce7e47
Papadimitropoulos, G.
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Davazoglou, D.
a946cf5d-287a-4734-ba55-b180ab4525ed
Vasilopoulou, M.
aad1381e-d091-4090-8c7c-b74bed22393d
Georgiadou, D. G.
84977176-3678-4fb3-a3dd-2044a49c853b
Palilis, L. C.
b09e9554-54da-4be5-aa08-bda894e2b86f
Argitis, P.
ab9c4ea6-3dd2-4e34-935d-81bfb360f358
Kennou, S.
7ca6a6bd-6a05-4110-b3da-c8807f798370
Sygellou, L.
87e6de58-e0d8-46b1-aaa9-0d2150379562
Konofaos, N.
18d67477-5af4-4d52-aa0c-3b933e96fc50
Iliadis, A.
4009bfb1-8f1d-483a-aa6b-ed81ed539b8c
Kostis, I.
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Papadimitropoulos, G.
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Davazoglou, D.
a946cf5d-287a-4734-ba55-b180ab4525ed

Vasilopoulou, M., Georgiadou, D. G., Palilis, L. C., Argitis, P., Kennou, S., Sygellou, L., Konofaos, N., Iliadis, A., Kostis, I., Papadimitropoulos, G. and Davazoglou, D. (2012) Reduced transition metal oxides as electron injection layers in hybrid-PLEDs. Microelectronic Engineering, 90, 59-61. (doi:10.1016/j.mee.2011.05.017).

Record type: Article

Abstract

Here we report on the improved performance of hybrid polymer light emitting diodes (HyPLEDs) upon inserting an ultra thin layer of partially reduced tungsten oxide (WO2.5) or molybdenum oxide (MoO2.7), deposited (by heating a W or Mo filament while hydrogen was flowing through the chamber) at the polymer/Al cathode interface. Improved current densities, luminances and efficiencies were achieved as a result of improved electron injection and transport at its interface with Al. The observed electron injection improvement is attributed to the lowering of the effective cathode interfacial barrier due to the occupation of gap states with electrons after partial reduction.

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More information

Accepted/In Press date: 12 May 2011
e-pub ahead of print date: 19 May 2012
Keywords: Hybrid polymer light emitting diodes, OLEDs, Reduced transition metal oxides, Reduction

Identifiers

Local EPrints ID: 440514
URI: http://eprints.soton.ac.uk/id/eprint/440514
ISSN: 0167-9317
PURE UUID: e07bb6e2-557d-4d9d-bede-9e4f93760997
ORCID for D. G. Georgiadou: ORCID iD orcid.org/0000-0002-2620-3346

Catalogue record

Date deposited: 06 May 2020 16:30
Last modified: 07 Oct 2020 02:27

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Contributors

Author: M. Vasilopoulou
Author: L. C. Palilis
Author: P. Argitis
Author: S. Kennou
Author: L. Sygellou
Author: N. Konofaos
Author: A. Iliadis
Author: I. Kostis
Author: G. Papadimitropoulos
Author: D. Davazoglou

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