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Two-Color Pixel Patterning for High-Resolution Organic Light-Emitting Displays Using Photolithography

Nowadays, the display industry is endeavoring to develop technology to provide large-area organic light-emitting diode (OLED) display panels with 8K or higher resolution. Although the selective deposition of organic molecules through shadow masks has proven to be the method of choice for mobile pane...

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Autores principales: Choi, Yu Min, Shin, Han Young, Son, Jongchan, Park, Chunhee, Park, Keun-Woo, Lee, Jin-Kyun, Jung, Byung Jun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7408551/
https://www.ncbi.nlm.nih.gov/pubmed/32629931
http://dx.doi.org/10.3390/mi11070650
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author Choi, Yu Min
Shin, Han Young
Son, Jongchan
Park, Chunhee
Park, Keun-Woo
Lee, Jin-Kyun
Jung, Byung Jun
author_facet Choi, Yu Min
Shin, Han Young
Son, Jongchan
Park, Chunhee
Park, Keun-Woo
Lee, Jin-Kyun
Jung, Byung Jun
author_sort Choi, Yu Min
collection PubMed
description Nowadays, the display industry is endeavoring to develop technology to provide large-area organic light-emitting diode (OLED) display panels with 8K or higher resolution. Although the selective deposition of organic molecules through shadow masks has proven to be the method of choice for mobile panels, it may not be so when independently defined high-resolution pixels are to be manufactured on a large substrate. This technical challenge motivated us to adopt the well-established photolithographic protocol to the OLED pixel patterning. In this study, we demonstrate the two-color OLED pixels integrated on a single substrate using a negative-tone highly fluorinated photoresist (PR) and fluorous solvents. Preliminary experiments were performed to examine the probable damaging effects of the developing and stripping processes upon a hole-transporting layer (HTL). No significant deterioration in the efficiency of the develop-processed device was observed. Efficiency of the device after lift-off was up to 72% relative to that of the reference device with no significant change in operating voltage. The procedure was repeated to successfully obtain two-color pixel arrays. Furthermore, the patterning of 15 μm green pixels was accomplished. It is expected that photolithography can provide a useful tool for the production of high-resolution large OLED displays in the near future.
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spelling pubmed-74085512020-08-13 Two-Color Pixel Patterning for High-Resolution Organic Light-Emitting Displays Using Photolithography Choi, Yu Min Shin, Han Young Son, Jongchan Park, Chunhee Park, Keun-Woo Lee, Jin-Kyun Jung, Byung Jun Micromachines (Basel) Article Nowadays, the display industry is endeavoring to develop technology to provide large-area organic light-emitting diode (OLED) display panels with 8K or higher resolution. Although the selective deposition of organic molecules through shadow masks has proven to be the method of choice for mobile panels, it may not be so when independently defined high-resolution pixels are to be manufactured on a large substrate. This technical challenge motivated us to adopt the well-established photolithographic protocol to the OLED pixel patterning. In this study, we demonstrate the two-color OLED pixels integrated on a single substrate using a negative-tone highly fluorinated photoresist (PR) and fluorous solvents. Preliminary experiments were performed to examine the probable damaging effects of the developing and stripping processes upon a hole-transporting layer (HTL). No significant deterioration in the efficiency of the develop-processed device was observed. Efficiency of the device after lift-off was up to 72% relative to that of the reference device with no significant change in operating voltage. The procedure was repeated to successfully obtain two-color pixel arrays. Furthermore, the patterning of 15 μm green pixels was accomplished. It is expected that photolithography can provide a useful tool for the production of high-resolution large OLED displays in the near future. MDPI 2020-06-30 /pmc/articles/PMC7408551/ /pubmed/32629931 http://dx.doi.org/10.3390/mi11070650 Text en © 2020 by the authors. 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 (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Choi, Yu Min
Shin, Han Young
Son, Jongchan
Park, Chunhee
Park, Keun-Woo
Lee, Jin-Kyun
Jung, Byung Jun
Two-Color Pixel Patterning for High-Resolution Organic Light-Emitting Displays Using Photolithography
title Two-Color Pixel Patterning for High-Resolution Organic Light-Emitting Displays Using Photolithography
title_full Two-Color Pixel Patterning for High-Resolution Organic Light-Emitting Displays Using Photolithography
title_fullStr Two-Color Pixel Patterning for High-Resolution Organic Light-Emitting Displays Using Photolithography
title_full_unstemmed Two-Color Pixel Patterning for High-Resolution Organic Light-Emitting Displays Using Photolithography
title_short Two-Color Pixel Patterning for High-Resolution Organic Light-Emitting Displays Using Photolithography
title_sort two-color pixel patterning for high-resolution organic light-emitting displays using photolithography
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7408551/
https://www.ncbi.nlm.nih.gov/pubmed/32629931
http://dx.doi.org/10.3390/mi11070650
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