Calculation of the emission power distribution of microstructured OLEDs using the reciprocity theorem

S. Zhang; E.R. Martins; A.G. Diyaf; J.I.B. Wilson; G.A. Turnbull; Ifor David William Samuel

doi:10.1016/j.synthmet.2015.03.035

Calculation of the emission power distribution of microstructured OLEDs using the reciprocity theorem

S. Zhang, E.R. Martins, A.G. Diyaf, J.I.B. Wilson, G.A. Turnbull, Ifor David William Samuel

Research output: Contribution to journal › Article › peer-review

Abstract

Integrating photonic microstructures into organic light-emitting diodes (OLEDs) has been a widely used strategy to improve their light out-coupling efficiency. However, there is still a need for optical modelling methods which quantitatively characterise the spatial emission pattern of microstructured OLEDs. In this paper, we demonstrate such rigorous calculation using the reciprocity theorem. The calculation of the emission intensity at each direction in the far field can be simplified into only two simple calculations of an incident plane wave propagating from the far field into a single cell of the periodic structure. The emission from microstructured OLED devices with three different grating periods was calculated as a test of the approach, and the calculated results were in good agreement with experiment. This optical modelling method is a useful calculation tool to investigate and control the spatial emission pattern of microstructured OLEDs.

Original language	English
Pages (from-to)	127-133
Number of pages	7
Journal	Synthetic Metals
Volume	205
Early online date	17 Apr 2015
DOIs	https://doi.org/10.1016/j.synthmet.2015.03.035
Publication status	Published - Jul 2015

Keywords

Organic light-emitting diode
Photonic microstructures
Optical modelling
Reciprocity theorem
Spatial emission pattern

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synthetic metals Zhang et al. revised
© 2015, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (http://creativecommons.org/licenses/by-nc-nd/4.0/)
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title = "Calculation of the emission power distribution of microstructured OLEDs using the reciprocity theorem",

abstract = "Integrating photonic microstructures into organic light-emitting diodes (OLEDs) has been a widely used strategy to improve their light out-coupling efficiency. However, there is still a need for optical modelling methods which quantitatively characterise the spatial emission pattern of microstructured OLEDs. In this paper, we demonstrate such rigorous calculation using the reciprocity theorem. The calculation of the emission intensity at each direction in the far field can be simplified into only two simple calculations of an incident plane wave propagating from the far field into a single cell of the periodic structure. The emission from microstructured OLED devices with three different grating periods was calculated as a test of the approach, and the calculated results were in good agreement with experiment. This optical modelling method is a useful calculation tool to investigate and control the spatial emission pattern of microstructured OLEDs.",

keywords = "Organic light-emitting diode, Photonic microstructures, Optical modelling, Reciprocity theorem, Spatial emission pattern",

author = "S. Zhang and E.R. Martins and A.G. Diyaf and J.I.B. Wilson and G.A. Turnbull and Samuel, {Ifor David William}",

note = "S. Zhang, E.R. Martins, G.A. Turnbull and I.D.W. Samuel are grateful to the Scottish Universities Physics Alliance (SUPA) and the Engineering and Physical Sciences Research Council (EPSRC) for financial support. ",

year = "2015",

month = jul,

doi = "10.1016/j.synthmet.2015.03.035",

language = "English",

volume = "205",

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journal = "Synthetic Metals",

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AU - Zhang, S.

AU - Martins, E.R.

AU - Diyaf, A.G.

AU - Wilson, J.I.B.

AU - Turnbull, G.A.

AU - Samuel, Ifor David William

N1 - S. Zhang, E.R. Martins, G.A. Turnbull and I.D.W. Samuel are grateful to the Scottish Universities Physics Alliance (SUPA) and the Engineering and Physical Sciences Research Council (EPSRC) for financial support.

PY - 2015/7

Y1 - 2015/7

N2 - Integrating photonic microstructures into organic light-emitting diodes (OLEDs) has been a widely used strategy to improve their light out-coupling efficiency. However, there is still a need for optical modelling methods which quantitatively characterise the spatial emission pattern of microstructured OLEDs. In this paper, we demonstrate such rigorous calculation using the reciprocity theorem. The calculation of the emission intensity at each direction in the far field can be simplified into only two simple calculations of an incident plane wave propagating from the far field into a single cell of the periodic structure. The emission from microstructured OLED devices with three different grating periods was calculated as a test of the approach, and the calculated results were in good agreement with experiment. This optical modelling method is a useful calculation tool to investigate and control the spatial emission pattern of microstructured OLEDs.

AB - Integrating photonic microstructures into organic light-emitting diodes (OLEDs) has been a widely used strategy to improve their light out-coupling efficiency. However, there is still a need for optical modelling methods which quantitatively characterise the spatial emission pattern of microstructured OLEDs. In this paper, we demonstrate such rigorous calculation using the reciprocity theorem. The calculation of the emission intensity at each direction in the far field can be simplified into only two simple calculations of an incident plane wave propagating from the far field into a single cell of the periodic structure. The emission from microstructured OLED devices with three different grating periods was calculated as a test of the approach, and the calculated results were in good agreement with experiment. This optical modelling method is a useful calculation tool to investigate and control the spatial emission pattern of microstructured OLEDs.

KW - Organic light-emitting diode

KW - Photonic microstructures

KW - Optical modelling

KW - Reciprocity theorem

KW - Spatial emission pattern

U2 - 10.1016/j.synthmet.2015.03.035

DO - 10.1016/j.synthmet.2015.03.035

M3 - Article

AN - SCOPUS:84927935116

SN - 0379-6779

VL - 205

SP - 127

EP - 133

JO - Synthetic Metals

JF - Synthetic Metals

ER -

Calculation of the emission power distribution of microstructured OLEDs using the reciprocity theorem

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Keywords

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