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A Simple Method for Fabricating an External Light Extraction Composite Layer with RNS to Improve the Optical Properties of OLEDs

In this study, we fabricated a random nanostructure (RNS) external light extraction composite layer containing high-refractive-index nanoparticles through a simple and inexpensive solution process and a low-temperature mask-free process. We focused on varying the shape and density of the RNSs and ad...

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Autores principales: Choi, Geun-Su, Kang, Shin-Woo, Bae, Eun-Jeong, Jang, Eun-Bi, Baek, Dong-Hyun, Ju, Byeong-Kwon, Park, Young-Wook
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9103064/
https://www.ncbi.nlm.nih.gov/pubmed/35564139
http://dx.doi.org/10.3390/nano12091430
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author Choi, Geun-Su
Kang, Shin-Woo
Bae, Eun-Jeong
Jang, Eun-Bi
Baek, Dong-Hyun
Ju, Byeong-Kwon
Park, Young-Wook
author_facet Choi, Geun-Su
Kang, Shin-Woo
Bae, Eun-Jeong
Jang, Eun-Bi
Baek, Dong-Hyun
Ju, Byeong-Kwon
Park, Young-Wook
author_sort Choi, Geun-Su
collection PubMed
description In this study, we fabricated a random nanostructure (RNS) external light extraction composite layer containing high-refractive-index nanoparticles through a simple and inexpensive solution process and a low-temperature mask-free process. We focused on varying the shape and density of the RNSs and adjusted the concentration of the high-refractive-index nanoparticles to control the optical properties. The RNSs fabricated using a low-temperature mask-free process can use the distance between the nanostructures and various forms to control the diffraction and scattering effects in the visible light wavelength range. Consequently, our film exhibited a direct transmittance of ~85% at a wavelength of 550 nm. Furthermore, when the RNSs’ composite film, manufactured using the low-temperature mask-free process, was applied to organic light-emitting diodes (OLEDs), it exhibited an external quantum efficiency improvement of 32.2% compared with the OLEDs without the RNSs. Therefore, the randomly distributed high-refractive-index nanoparticles on the polymer film can reduce the waveguide mode and total reflection at the substrate/air interface. These films can be used as a scattering layer to reduce the loss of the OLED substrate mode.
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spelling pubmed-91030642022-05-14 A Simple Method for Fabricating an External Light Extraction Composite Layer with RNS to Improve the Optical Properties of OLEDs Choi, Geun-Su Kang, Shin-Woo Bae, Eun-Jeong Jang, Eun-Bi Baek, Dong-Hyun Ju, Byeong-Kwon Park, Young-Wook Nanomaterials (Basel) Article In this study, we fabricated a random nanostructure (RNS) external light extraction composite layer containing high-refractive-index nanoparticles through a simple and inexpensive solution process and a low-temperature mask-free process. We focused on varying the shape and density of the RNSs and adjusted the concentration of the high-refractive-index nanoparticles to control the optical properties. The RNSs fabricated using a low-temperature mask-free process can use the distance between the nanostructures and various forms to control the diffraction and scattering effects in the visible light wavelength range. Consequently, our film exhibited a direct transmittance of ~85% at a wavelength of 550 nm. Furthermore, when the RNSs’ composite film, manufactured using the low-temperature mask-free process, was applied to organic light-emitting diodes (OLEDs), it exhibited an external quantum efficiency improvement of 32.2% compared with the OLEDs without the RNSs. Therefore, the randomly distributed high-refractive-index nanoparticles on the polymer film can reduce the waveguide mode and total reflection at the substrate/air interface. These films can be used as a scattering layer to reduce the loss of the OLED substrate mode. MDPI 2022-04-22 /pmc/articles/PMC9103064/ /pubmed/35564139 http://dx.doi.org/10.3390/nano12091430 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Choi, Geun-Su
Kang, Shin-Woo
Bae, Eun-Jeong
Jang, Eun-Bi
Baek, Dong-Hyun
Ju, Byeong-Kwon
Park, Young-Wook
A Simple Method for Fabricating an External Light Extraction Composite Layer with RNS to Improve the Optical Properties of OLEDs
title A Simple Method for Fabricating an External Light Extraction Composite Layer with RNS to Improve the Optical Properties of OLEDs
title_full A Simple Method for Fabricating an External Light Extraction Composite Layer with RNS to Improve the Optical Properties of OLEDs
title_fullStr A Simple Method for Fabricating an External Light Extraction Composite Layer with RNS to Improve the Optical Properties of OLEDs
title_full_unstemmed A Simple Method for Fabricating an External Light Extraction Composite Layer with RNS to Improve the Optical Properties of OLEDs
title_short A Simple Method for Fabricating an External Light Extraction Composite Layer with RNS to Improve the Optical Properties of OLEDs
title_sort simple method for fabricating an external light extraction composite layer with rns to improve the optical properties of oleds
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9103064/
https://www.ncbi.nlm.nih.gov/pubmed/35564139
http://dx.doi.org/10.3390/nano12091430
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