Optical characteristics of refractive-index-matching diffusion layer in organic light-emitting diodes

Cheol Hwee Park, Jae Geun Kim, Sun Gyu Jung, Dong Jun Lee, Young Wook Park, Byeong Kwon Ju

Research output: Contribution to journalArticle

Abstract

We developed a diffusion layer with a refractive index-matching layer added to a transparent nanoscale polymer-based structure to obtain its effective scattering effects. The diffusion layer had higher haze when the refractive index-matching layer to a higher refractive index was used. This diffusion layer was applied to conventional organic light-emitting diodes (OLEDs) and micro-cavity OLEDs (MC-OLEDs) to evaluate the characteristics. When a diffusion layer was applied to conventional OLEDs, the external quantum efficiency (EQE) was 31.1% higher than that of the device without a diffusion layer due to the reduction of the substrate mode, and the viewing angle characteristic was also improved. Then, when the diffusion layer was applied to the MC-OLEDs, all devices showed similar EQE values regardless of the presence or absence of the diffusion layer, and the viewing-angle-dependent characteristics were greatly improved by the diffusion layer. Furthermore, when the diffusion layer was used with polarizer film, the black color implementation was not affected by the polarizer film, proving that it is applicable to actual OLED display products.

Original languageEnglish
Number of pages1
JournalScientific reports
Volume9
Issue number1
DOIs
Publication statusPublished - 2019 Jun 18

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Refractometry
Light
Equipment and Supplies
Polymers
Color

ASJC Scopus subject areas

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Optical characteristics of refractive-index-matching diffusion layer in organic light-emitting diodes. / Park, Cheol Hwee; Kim, Jae Geun; Jung, Sun Gyu; Lee, Dong Jun; Park, Young Wook; Ju, Byeong Kwon.

In: Scientific reports, Vol. 9, No. 1, 18.06.2019.

Research output: Contribution to journalArticle

Park, Cheol Hwee ; Kim, Jae Geun ; Jung, Sun Gyu ; Lee, Dong Jun ; Park, Young Wook ; Ju, Byeong Kwon. / Optical characteristics of refractive-index-matching diffusion layer in organic light-emitting diodes. In: Scientific reports. 2019 ; Vol. 9, No. 1.
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abstract = "We developed a diffusion layer with a refractive index-matching layer added to a transparent nanoscale polymer-based structure to obtain its effective scattering effects. The diffusion layer had higher haze when the refractive index-matching layer to a higher refractive index was used. This diffusion layer was applied to conventional organic light-emitting diodes (OLEDs) and micro-cavity OLEDs (MC-OLEDs) to evaluate the characteristics. When a diffusion layer was applied to conventional OLEDs, the external quantum efficiency (EQE) was 31.1{\%} higher than that of the device without a diffusion layer due to the reduction of the substrate mode, and the viewing angle characteristic was also improved. Then, when the diffusion layer was applied to the MC-OLEDs, all devices showed similar EQE values regardless of the presence or absence of the diffusion layer, and the viewing-angle-dependent characteristics were greatly improved by the diffusion layer. Furthermore, when the diffusion layer was used with polarizer film, the black color implementation was not affected by the polarizer film, proving that it is applicable to actual OLED display products.",
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