Enhancing the emission directionality of organic light-emitting diodes by using photonic microstructures

Shuyu Zhang; Graham A. Turnbull; Ifor David William Samuel

doi:10.1063/1.4829759

Enhancing the emission directionality of organic light-emitting diodes by using photonic microstructures

Shuyu Zhang, Graham A. Turnbull, Ifor David William Samuel

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Abstract

We report microstructured organic light-emitting diodes (OLEDs) with directional emission based on efficient solution-processable europium-OLEDs patterned by solvent assisted microcontact molding. The angle dependence of the light emission is characterized for OLEDs with square-array photonic crystals with periods between 275 nm and 335 nm. The microstructured devices have emission patterns strongly modified from the Lambertian emission of planar OLEDs and can approximately double the emitted power in a desired angle range in both s- and p-polarizations.
The modified emission is attributed to light diffracted out of the waveguide modes of the OLEDs.

Original language	English
Article number	213302
Number of pages	5
Journal	Applied Physics Letters
Volume	103
Early online date	18 Nov 2013
DOIs	https://doi.org/10.1063/1.4829759
Publication status	Published - 21 Nov 2013

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zhang2013appphyslett213302
© 2013. AIP Publishing LLC. This article was published in Applied Physics Letters on 18 November 2013, available online: http://scitation.aip.org/content/aip/journal/apl/103/21/10.1063/1.4829759
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title = "Enhancing the emission directionality of organic light-emitting diodes by using photonic microstructures",

abstract = "We report microstructured organic light-emitting diodes (OLEDs) with directional emission based on efficient solution-processable europium-OLEDs patterned by solvent assisted microcontact molding. The angle dependence of the light emission is characterized for OLEDs with square-array photonic crystals with periods between 275 nm and 335 nm. The microstructured devices have emission patterns strongly modified from the Lambertian emission of planar OLEDs and can approximately double the emitted power in a desired angle range in both s- and p-polarizations.The modified emission is attributed to light diffracted out of the waveguide modes of the OLEDs.",

author = "Shuyu Zhang and Turnbull, {Graham A.} and Samuel, {Ifor David William}",

note = "S. Zhang, 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.",

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AU - Zhang, Shuyu

AU - Turnbull, Graham A.

AU - Samuel, Ifor David William

N1 - S. Zhang, 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.

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Y1 - 2013/11/21

N2 - We report microstructured organic light-emitting diodes (OLEDs) with directional emission based on efficient solution-processable europium-OLEDs patterned by solvent assisted microcontact molding. The angle dependence of the light emission is characterized for OLEDs with square-array photonic crystals with periods between 275 nm and 335 nm. The microstructured devices have emission patterns strongly modified from the Lambertian emission of planar OLEDs and can approximately double the emitted power in a desired angle range in both s- and p-polarizations.The modified emission is attributed to light diffracted out of the waveguide modes of the OLEDs.

AB - We report microstructured organic light-emitting diodes (OLEDs) with directional emission based on efficient solution-processable europium-OLEDs patterned by solvent assisted microcontact molding. The angle dependence of the light emission is characterized for OLEDs with square-array photonic crystals with periods between 275 nm and 335 nm. The microstructured devices have emission patterns strongly modified from the Lambertian emission of planar OLEDs and can approximately double the emitted power in a desired angle range in both s- and p-polarizations.The modified emission is attributed to light diffracted out of the waveguide modes of the OLEDs.

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DO - 10.1063/1.4829759

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VL - 103

JO - Applied Physics Letters

JF - Applied Physics Letters

M1 - 213302

ER -

Enhancing the emission directionality of organic light-emitting diodes by using photonic microstructures

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