Interfaces and pattern resolution of inkjet-printed organic light-emitting diodes with a novel hole transport layer
In this paper, the effects of the combination of solvents on the uniformity of a dried emitting layer and on device performance were studied. Green emitter inks with various solvents were prepared, and it was seen that good film uniformity of printed layers could be obtained with a solvent mixture w...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2021-04-01
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| Series: | Journal of Information Display |
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| Online Access: | http://dx.doi.org/10.1080/15980316.2020.1866090 |
| _version_ | 1818848025497305088 |
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| author | Dai Geon Yoon You Jung Kang Robert Bail Byung Doo Chin |
| author_facet | Dai Geon Yoon You Jung Kang Robert Bail Byung Doo Chin |
| author_sort | Dai Geon Yoon |
| collection | DOAJ |
| description | In this paper, the effects of the combination of solvents on the uniformity of a dried emitting layer and on device performance were studied. Green emitter inks with various solvents were prepared, and it was seen that good film uniformity of printed layers could be obtained with a solvent mixture with different boiling points, which reduced the coffee ring effect on a dried surface. During the inkjet process, the drop injection condition aiming was also controlled for better drop-to-drop spacing and reduction of the line-edge roughness. Printed patterns of a small molecular/polymer hybrid emitting layer, composed of the chlorobenzene-dichlorobenzene solvent mixture, showed significantly reduced roughness of the microscopic surface and improved efficiency of the inkjet device, at levels nearly comparable to those of spin-coated patterns. A suitable hole transport layer (HTL) was also further developed as an interfacial material, prior to the solution processing of the emitter. The cross-linkable HTL was composed of triphenylamine as the cross-linking unit and a fluorene-based compound. At the optimized condition of the solvent formulation, printed droplets within 100 µm× 300 µm pixels formed a uniform stripe without remarkable coffee-ring defects and line-edge surface roughness. |
| first_indexed | 2024-12-19T06:10:47Z |
| format | Article |
| id | doaj.art-b5958a482a844f279bdc228f5ae40b48 |
| institution | Directory Open Access Journal |
| issn | 1598-0316 2158-1606 |
| language | English |
| last_indexed | 2024-12-19T06:10:47Z |
| publishDate | 2021-04-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Journal of Information Display |
| spelling | doaj.art-b5958a482a844f279bdc228f5ae40b482022-12-21T20:33:02ZengTaylor & Francis GroupJournal of Information Display1598-03162158-16062021-04-01222919810.1080/15980316.2020.18660901866090Interfaces and pattern resolution of inkjet-printed organic light-emitting diodes with a novel hole transport layerDai Geon Yoon0You Jung Kang1Robert Bail2Byung Doo Chin3Dankook UniversityDankook UniversityDankook UniversityDankook UniversityIn this paper, the effects of the combination of solvents on the uniformity of a dried emitting layer and on device performance were studied. Green emitter inks with various solvents were prepared, and it was seen that good film uniformity of printed layers could be obtained with a solvent mixture with different boiling points, which reduced the coffee ring effect on a dried surface. During the inkjet process, the drop injection condition aiming was also controlled for better drop-to-drop spacing and reduction of the line-edge roughness. Printed patterns of a small molecular/polymer hybrid emitting layer, composed of the chlorobenzene-dichlorobenzene solvent mixture, showed significantly reduced roughness of the microscopic surface and improved efficiency of the inkjet device, at levels nearly comparable to those of spin-coated patterns. A suitable hole transport layer (HTL) was also further developed as an interfacial material, prior to the solution processing of the emitter. The cross-linkable HTL was composed of triphenylamine as the cross-linking unit and a fluorene-based compound. At the optimized condition of the solvent formulation, printed droplets within 100 µm× 300 µm pixels formed a uniform stripe without remarkable coffee-ring defects and line-edge surface roughness.http://dx.doi.org/10.1080/15980316.2020.1866090oledinkjet printingsolvent formulationpattern qualitycross-linked htl |
| spellingShingle | Dai Geon Yoon You Jung Kang Robert Bail Byung Doo Chin Interfaces and pattern resolution of inkjet-printed organic light-emitting diodes with a novel hole transport layer Journal of Information Display oled inkjet printing solvent formulation pattern quality cross-linked htl |
| title | Interfaces and pattern resolution of inkjet-printed organic light-emitting diodes with a novel hole transport layer |
| title_full | Interfaces and pattern resolution of inkjet-printed organic light-emitting diodes with a novel hole transport layer |
| title_fullStr | Interfaces and pattern resolution of inkjet-printed organic light-emitting diodes with a novel hole transport layer |
| title_full_unstemmed | Interfaces and pattern resolution of inkjet-printed organic light-emitting diodes with a novel hole transport layer |
| title_short | Interfaces and pattern resolution of inkjet-printed organic light-emitting diodes with a novel hole transport layer |
| title_sort | interfaces and pattern resolution of inkjet printed organic light emitting diodes with a novel hole transport layer |
| topic | oled inkjet printing solvent formulation pattern quality cross-linked htl |
| url | http://dx.doi.org/10.1080/15980316.2020.1866090 |
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