Enhanced light outcoupling in a thin film by texturing meshed surfaces

Cheng, Yu-Hung; Wu, Jialin; Cheng, Chien‐Hong; Syao, Kao-Chih; Lee, Ming-Chang M.

doi:10.1063/1.2709920

Cited by 93 publications

(49 citation statements)

References 11 publications

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“…For OLEDs, extraction techniques, such as microlens arrays, sand-blasting, and light scattering films, have been used to extract the substrate mode, resulting in ∼50% enhancement in light outcoupling efficiency. [319][320][321] A variety of approaches for extracting wave-guided modes trapped in ITO/organic layers, such as PCs, corrugated grating substrates, and high-index substrates, have been demonstrated to enhance the light outcoupling efficiency. [322][323][324][325][326] Mie scattering supported by dielectric nanostructures and localized SPRs supported by metallic nanostructures are also effective at increasing the light extraction efficiency of light-emitting devices due to their large scattering cross sections.…”

Section: Light Management For Display and Lighting Applicationsmentioning

confidence: 99%

The role of photonics in energy

et al. 2015

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Abstract. In celebration of the 2015 International Year of Light, we highlight major breakthroughs in photonics for energy conversion and conservation. The section on energy conversion discusses the role of light in solar light harvesting for electrical and thermal power generation; chemical energy conversion and fuel generation; as well as photonic sensors for energy applications. The section on energy conservation focuses on solid-state lighting, flat-panel displays, and optical communications and interconnects.

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Section: Light Management For Display and Lighting Applicationsmentioning

confidence: 99%

The role of photonics in energy

et al. 2015

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“…For example, the glass mode can be extracted from the substrate by forming either a microlens array or a diffusing layer on the glass substrate [5][6][7][8][9][10][11][12]. The internal bulk or interface structures were modified to extract the light trapped in the organic layers by, for example, reflector modification, insertion of low-index grids in the organic layers, interface or structure modification of the organic and ITO layers, and patterning the ITO electrodes along with an insertion of a high-conductivity polymer layer [13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Simulation Study on the Effect of the Emitter Orientation and Photonic Crystals on the Outcoupling Efficiency of Organic Light-Emitting Diodes

Lee

Park

et al. 2014

Journal of the Optical Society of Korea

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Combined optical simulation of the ray-tracing technique and the finite difference time domain method was used to investigate the effect of the emitter orientation and the photonic crystal layer on the outcoupling efficiency (OCE) of bottom-emission type organic light emitting diodes (OLEDs). The OLED with a horizontal emitter exhibited an opposite interference effect to that of one with a vertical emitter, which suggested that the OCE would be very sensitive to the emitter orientation at a fixed emitter-cathode distance. The OLED with a horizontal emitter exhibited much larger OCE than that with a vertical emitter did, which was due to the substantial difference in the radiation pattern along with the different coupling with the surface plasmon excitation. The OCE with a horizontal emitter was increased by approximately 1.3 times by inserting a photonic crystal layer between the indium tin oxide layer and the glass substrate. The present study suggested that appropriate control of the emitter orientation and its combination to other outcoupling structures could be used to enhance the OCE of OLEDs substantially.

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“…However, a substantial portion of the generated light is trapped in the organic layers and the glass substrate because of their high refractive indices [3]. Many attempts have been made to improve the outcoupling efficiency (OCE) of OLEDs [1][2][3][4][5], one of which is to apply a diffusing structure [6][7][8][9]. Using a glass substrate as a diffusing layer in OLEDs may be very cost-effective in many outcoupling designs.…”

Section: Introductionmentioning

confidence: 99%

Optical Simulation Study on the Effect of Diffusing Substrate and Pillow Lenses on the Outcoupling Efficiency of Organic Light Emitting Diodes

Jeong¹,

Ko²

2013

Journal of the Optical Society of Korea

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The effect of diffusing substrate and pillow lenses on the outcoupling efficiency of organic light-emitting diodes (OLEDs) was studied by optical simulation based on the point-dipole model. The diffusing substrate included Mie scatterers by which the condition of total internal reflection could be broken. The finite-difference time-domain method was used to obtain the intensity distribution on the transparent electrode of an OLED, which was used as a light source to carry out a ray-tracing simulation of the OLED and the diffusing substrate. It was found that the outcoupling efficiency of the OLED was sensitive to the thickness of organic layers and could be increased by 21.0% by adopting a diffusing substrate in which Mie scatterers whose radius was 2.0 μm were included at the density of 10 7 mm -3 and by 65.5% by forming one pillow lens with the radius of 2 mm on the front surface of the glass substrate. This study revealed that the outcoupling efficiency could be improved by adopting diffusing substrate and pillow lenses along with the optimization of the thickness of each layer in the OLED.

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Enhanced light outcoupling in a thin film by texturing meshed surfaces

Cited by 93 publications

References 11 publications

The role of photonics in energy

The role of photonics in energy

Simulation Study on the Effect of the Emitter Orientation and Photonic Crystals on the Outcoupling Efficiency of Organic Light-Emitting Diodes

Optical Simulation Study on the Effect of Diffusing Substrate and Pillow Lenses on the Outcoupling Efficiency of Organic Light Emitting Diodes

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