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Proceedings Paper

Employing a 2D surface grating to improve light out coupling of a substrate emitting organic LED
Author(s): Peter Vandersteegen; Angel Ullan Nieto; Carl Van Buggenhout; Steven Verstuyft; Peter Bienstman; Peter Debackere; Kristiaan Neyts; Roel Baets
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Paper Abstract

We present simulation and experimental results to achieve increased light extraction of a substrate emitting OLED. We present a comparison between a grating surface on the OLED and an array of microlenses at the interface between substrate and air. This experimentally gives -in both cases- a relative improvement of approx. 30 %. We also demonstrate the concept of a RC2LED, applied to an OLED. The RC2LED is composed by adding a high, low and high index layers between ITO and glass, i.e. the interface between organic layers and glass. These extra layers create a cavity which numerically gives a relative improvement of over 60% at the resonance wavelength of the cavity over a wavelength range of 50-100 nm. The influence of an array of micro lenses in addition to the RC2 layers is also investigated in this paper.

Paper Details

Date Published: 26 February 2007
PDF: 8 pages
Proc. SPIE 6486, Light-Emitting Diodes: Research, Manufacturing, and Applications XI, 64860H (26 February 2007); doi: 10.1117/12.701344
Show Author Affiliations
Peter Vandersteegen, Univ. Gent (Belgium)
Angel Ullan Nieto, Univ. Gent (Belgium)
Carl Van Buggenhout, Univ. Gent (Belgium)
Steven Verstuyft, Univ. Gent (Belgium)
Peter Bienstman, Univ. Gent (Belgium)
Peter Debackere, Univ. Gent (Belgium)
Kristiaan Neyts, Univ. Gent (Belgium)
Roel Baets, Univ. Gent (Belgium)

Published in SPIE Proceedings Vol. 6486:
Light-Emitting Diodes: Research, Manufacturing, and Applications XI
Klaus P. Streubel; Heonsu Jeon, Editor(s)

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