Strongly modified angular dependence of emission from OLEDs

Shuyu Zhang; Graham A. Turnbull; Ifor D. W. Samuel

doi:10.1117/12.931576

13 September 2012 Strongly modified angular dependence of emission from OLEDs

Shuyu Zhang, Graham A. Turnbull, Ifor D. W. Samuel

Proceedings Volume 8476, Organic Light Emitting Materials and Devices XVI; 847615 (2012) https://doi.org/10.1117/12.931576
Event: SPIE Organic Photonics + Electronics, 2012, San Diego, California, United States

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.

Citation Download Citation

Shuyu Zhang, Graham A. Turnbull, and Ifor D. W. Samuel "Strongly modified angular dependence of emission from OLEDs", Proc. SPIE 8476, Organic Light Emitting Materials and Devices XVI, 847615 (13 September 2012); https://doi.org/10.1117/12.931576

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