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Photonic Quasi-crystal enhanced Organic Light Emitting Diodes

Photonic Quasi-crystal enhanced Organic Light Emitting Diodes
Photonic Quasi-crystal enhanced Organic Light Emitting Diodes
In this paper we discuss theoretical modelling methods for design of photonic crystal and photonic quasi-crystal (PQC) Organic –Light Emitting Diodes, and apply them to the analysis of the extraction enhancement performance, and extraction beam shaping profile of bottom emitting organic LED structures incorporating photonic crystal structures within the layer stack. We first discuss trapping mechanisms within an OLED stack and investigate the effect of position of the patterning within the OLED layer structure, to derive the optimal position for maximum extraction efficiency and ease of fabrication. We investigate performance improvement associated with top and rear side patterning of the glass cover slip, effect of refractive index contrast for the backfill material and effect of lattice pitch. In addition, we examine the physical mechanisms giving rise to performance improvement in each case, examining the interplay and relative contributions to performance improvement such as effective index reduction effects which alter conditions for total internal reflection at the device air interface, and photonic crystal scattering effects which give rise to radically improved extraction performance.
Charlton, Martin
fcf86ab0-8f34-411a-b576-4f684e51e274
Lidzey, David G
073d4479-103d-401c-bcb2-293decbb9114
Chalcraft, Alexander
151394ac-b231-4090-b1f9-ecef59b3be23
Noutsos, Karen
69513e52-9e72-4d27-8e87-86e0de6f7b55
Smith, Euan
50548a2d-de67-4379-aa24-c455a593ae68
Patel, Nalin
b1ce466b-5c16-48cd-867c-35aefe634040
Charlton, Martin
fcf86ab0-8f34-411a-b576-4f684e51e274
Lidzey, David G
073d4479-103d-401c-bcb2-293decbb9114
Chalcraft, Alexander
151394ac-b231-4090-b1f9-ecef59b3be23
Noutsos, Karen
69513e52-9e72-4d27-8e87-86e0de6f7b55
Smith, Euan
50548a2d-de67-4379-aa24-c455a593ae68
Patel, Nalin
b1ce466b-5c16-48cd-867c-35aefe634040

Charlton, Martin, Lidzey, David G, Chalcraft, Alexander, Noutsos, Karen, Smith, Euan and Patel, Nalin (2010) Photonic Quasi-crystal enhanced Organic Light Emitting Diodes At Optics Photonics 2010 (SPIE), United States.

Record type: Conference or Workshop Item (Other)

Abstract

In this paper we discuss theoretical modelling methods for design of photonic crystal and photonic quasi-crystal (PQC) Organic –Light Emitting Diodes, and apply them to the analysis of the extraction enhancement performance, and extraction beam shaping profile of bottom emitting organic LED structures incorporating photonic crystal structures within the layer stack. We first discuss trapping mechanisms within an OLED stack and investigate the effect of position of the patterning within the OLED layer structure, to derive the optimal position for maximum extraction efficiency and ease of fabrication. We investigate performance improvement associated with top and rear side patterning of the glass cover slip, effect of refractive index contrast for the backfill material and effect of lattice pitch. In addition, we examine the physical mechanisms giving rise to performance improvement in each case, examining the interplay and relative contributions to performance improvement such as effective index reduction effects which alter conditions for total internal reflection at the device air interface, and photonic crystal scattering effects which give rise to radically improved extraction performance.

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More information

Published date: 2010
Additional Information: Event Dates: 2nd August
Venue - Dates: Optics Photonics 2010 (SPIE), United States, 2010-08-02
Organisations: Nanoelectronics and Nanotechnology

Identifiers

Local EPrints ID: 270976
URI: http://eprints.soton.ac.uk/id/eprint/270976
PURE UUID: d68c40a9-d44e-4d53-8d7c-f3a43e21c43b

Catalogue record

Date deposited: 04 May 2010 10:56
Last modified: 18 Jul 2017 06:48

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Contributors

Author: Martin Charlton
Author: David G Lidzey
Author: Alexander Chalcraft
Author: Karen Noutsos
Author: Euan Smith
Author: Nalin Patel

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