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Proceedings Paper

Strongly modified angular dependence of emission from OLEDs
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Paper Abstract

The emission pattern of organic light-emitting diodes (OLEDs) is usually close to Lambertian. This paper explores the factors controlling the angular dependence of the emission from OLEDs. In particular it considers the question of how far from Lambertian can the emission of an OLED be? We have examined how wavelength-scale microstructure can modify the pattern of light emission from OLEDs. We demonstrate OLEDs in which emission is strongly directed towards, or away from, the forward direction. We consider the relative importance of scattering of waveguide modes, surface plasmons and microcavity effects in the strongly modified emission patterns which we observe.

Paper Details

Date Published: 13 September 2012
PDF: 4 pages
Proc. SPIE 8476, Organic Light Emitting Materials and Devices XVI, 847615 (13 September 2012); doi: 10.1117/12.931576
Show Author Affiliations
Shuyu Zhang, Univ. of St. Andrews (United Kingdom)
Graham A. Turnbull, Univ. of St. Andrews (United Kingdom)
Ifor D. W. Samuel, Univ. of St. Andrews (United Kingdom)

Published in SPIE Proceedings Vol. 8476:
Organic Light Emitting Materials and Devices XVI
Franky So; Chihaya Adachi, Editor(s)

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