2023
DOI: 10.1002/adom.202202557
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Correlated Disorder Substrate‐Integrated Nanodisk Scatterers for Light Extraction in Organic Light Emitting Diodes

Abstract: A major loss mechanism in organic light emitting diodes (OLEDs) is the coupling of the emitter molecule light field to waveguide modes in the OLED thin film stack. In this work, a disordered 2D array of TiO2 nanodisk scatterers is integrated into the OLED substrate to enable efficient light extraction from these waveguide modes. Fabrication of the nanodisks is based on a bottom‐up, colloidal lithography technique and subsequent pattern transfer into high refractive index TiO2 via reactive ion etching. The subs… Show more

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Cited by 4 publications
(2 citation statements)
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“…Previously, randomly textured and periodic structures were studied for light management in photovoltaics and light-emitting diodes (LEDs), amongst others. [23][24][25] Lambertian textured surfaces appear highly effective and are utilized extensively for light trapping and out-coupling. On the other hand, in the course of evolution, natural selection has produced useful textured structures that modulate electromagnetic radiation for temperature regulation and camouflage.…”
Section: Introductionmentioning
confidence: 99%
“…Previously, randomly textured and periodic structures were studied for light management in photovoltaics and light-emitting diodes (LEDs), amongst others. [23][24][25] Lambertian textured surfaces appear highly effective and are utilized extensively for light trapping and out-coupling. On the other hand, in the course of evolution, natural selection has produced useful textured structures that modulate electromagnetic radiation for temperature regulation and camouflage.…”
Section: Introductionmentioning
confidence: 99%
“…Here, we propose a design based on a textured membrane that changes its surface geometry between flat and textured (wrinkled) as a function of temperature to modulate the outer surface emissivity. Previously, randomly textured and periodic structures were studied for light management in photovoltaics and light-emitting diodes (LEDs), among others. Lambertian textured surfaces (i.e., perfectly diffusive surfaces) appear highly effective and are utilized extensively for light trapping and out-coupling. On the other hand, in the course of evolution, natural selection has produced useful textured structures that modulate electromagnetic radiation for temperature regulation and camouflage.…”
Section: Introductionmentioning
confidence: 99%