Employing a 2D surface grating to improve light out coupling of a substrate emitting organic LED

Peter Vandersteegen; Angel Ullan Nieto; Carl Van Buggenhout; Steven Verstuyft; Peter Bienstman; Peter Debackere; Kristiaan Neyts; Roel Baets

doi:10.1117/12.701344

26 February 2007 Employing a 2D surface grating to improve light out coupling of a substrate emitting organic LED

Peter Vandersteegen, Angel Ullan Nieto, Carl Van Buggenhout, Steven Verstuyft, Peter Bienstman, Peter Debackere, Kristiaan Neyts, Roel Baets

Author Affiliations +

Proceedings Volume 6486, Light-Emitting Diodes: Research, Manufacturing, and Applications XI; 64860H (2007) https://doi.org/10.1117/12.701344
Event: Integrated Optoelectronic Devices 2007, 2007, San Jose, California, United States

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.

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Peter Vandersteegen, Angel Ullan Nieto, Carl Van Buggenhout, Steven Verstuyft, Peter Bienstman, Peter Debackere, Kristiaan Neyts, and Roel Baets "Employing a 2D surface grating to improve light out coupling of a substrate emitting organic LED", Proc. SPIE 6486, Light-Emitting Diodes: Research, Manufacturing, and Applications XI, 64860H (26 February 2007); https://doi.org/10.1117/12.701344

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