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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| Format: | Article |
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MDPI AG
2020-06-01
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| Series: | Micromachines |
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| Online Access: | https://www.mdpi.com/2072-666X/11/7/650 |
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| author | Yu Min Choi Han Young Shin Jongchan Son Chunhee Park Keun-Woo Park Jin-Kyun Lee Byung Jun Jung |
| author_facet | Yu Min Choi Han Young Shin Jongchan Son Chunhee Park Keun-Woo Park Jin-Kyun Lee Byung Jun Jung |
| author_sort | Yu Min Choi |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-03-10T18:47:55Z |
| format | Article |
| id | doaj.art-e60ca3bb8d984e0986abd6252815e67e |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-03-10T18:47:55Z |
| publishDate | 2020-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj.art-e60ca3bb8d984e0986abd6252815e67e2023-11-20T05:25:17ZengMDPI AGMicromachines2072-666X2020-06-0111765010.3390/mi11070650Two-Color Pixel Patterning for High-Resolution Organic Light-Emitting Displays Using PhotolithographyYu Min Choi0Han Young Shin1Jongchan Son2Chunhee Park3Keun-Woo Park4Jin-Kyun Lee5Byung Jun Jung6Department of Materials Science and Engineering, University of Seoul, Seoul 02504, KoreaDepartment of Materials Science and Engineering, University of Seoul, Seoul 02504, KoreaDepartment of Polymer Science and Engineering, Inha University, Incheon 22212, KoreaDepartment of Polymer Science and Engineering, Inha University, Incheon 22212, KoreaDepartment of Polymer Science and Engineering, Inha University, Incheon 22212, KoreaDepartment of Polymer Science and Engineering, Inha University, Incheon 22212, KoreaDepartment of Materials Science and Engineering, University of Seoul, Seoul 02504, KoreaNowadays, 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.https://www.mdpi.com/2072-666X/11/7/650organic light-emitting diode (OLED), photolithographypixel patterninghigh resolutionhighly fluorinated materials |
| spellingShingle | Yu Min Choi Han Young Shin Jongchan Son Chunhee Park Keun-Woo Park Jin-Kyun Lee Byung Jun Jung Two-Color Pixel Patterning for High-Resolution Organic Light-Emitting Displays Using Photolithography Micromachines organic light-emitting diode (OLED), photolithography pixel patterning high resolution highly fluorinated materials |
| 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 | organic light-emitting diode (OLED), photolithography pixel patterning high resolution highly fluorinated materials |
| url | https://www.mdpi.com/2072-666X/11/7/650 |
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