Rational design, synthesis, and characterization of a photocrosslinkable hole-transporting polymer for high performance solution-processed thermally activated delayed fluorescence OLEDs
DC Field | Value | Language |
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dc.contributor.author | Lee, Ji Hye | - |
dc.contributor.author | Jeong, Cheol Hun | - |
dc.contributor.author | Godumala, Mallesham | - |
dc.contributor.author | Kim, Chae Yeong | - |
dc.contributor.author | Kim, Hyung Jong | - |
dc.contributor.author | Hwang, Jin Hyo | - |
dc.contributor.author | Kim, Yong Woo | - |
dc.contributor.author | Choi, Dae Hyuk | - |
dc.contributor.author | Cho, Min Ju | - |
dc.contributor.author | Choi, Dong Hoon | - |
dc.date.accessioned | 2021-08-31T04:09:47Z | - |
dc.date.available | 2021-08-31T04:09:47Z | - |
dc.date.created | 2021-06-18 | - |
dc.date.issued | 2020-04-07 | - |
dc.identifier.issn | 2050-7526 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/56643 | - |
dc.description.abstract | A new photocrosslinkable hole-transporting homopolymer (PX2Cz) was successfully synthesized using 9-((3-methyloxetan-3-yl)methyl)-9 '-(4-vinylbenzyl)-9H,9 ' H-3,3 '-bicarbazole monomer via radical polymerization. Biscarbazole, as a hole-transporting material, has two reactive sites that can introduce a radical polymerizable styrene moiety and a photocrosslinkable oxetane moiety. The photocuring temperature and time for the PX2Cz film was optimized to be 120 degrees C and 10 s. The photocured films showed good solvent resistance, which is favorable for the deposition of an emitting-layer solution on them. In particular, the highest occupied molecular orbital (HOMO) energy of the as-cast PX2Cz film was determined to be -5.37 eV which remained unchanged even after photocuring, thus facilitating hole transportation from the hole-injection layer. Subsequently, solution-processed, green, thermally activated delayed fluorescent organic light-emitting diodes (TADF-OLEDs) were manufactured using PX2Cz as the hole-transport material. The devices displayed a notable performance with an exceptionally low turn-on voltage (V-on) of only 2.8 V and a high external quantum efficiency (EQE) of 22.5%; these values are substantially better than those of commonly used poly(9-vinylcarbazole) (PVK)-based OLEDs (V-on = 3.6 V, EQE of 15.5%). The remarkably low turn-on voltage and high EQE were ascribed to the shallower HOMO energy level and more pronounced hole-transport ability of the photocured PX2Cz film. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | ROYAL SOC CHEMISTRY | - |
dc.subject | LIGHT-EMITTING DEVICES | - |
dc.subject | EFFICIENCY | - |
dc.subject | LAYER | - |
dc.subject | BLUE | - |
dc.subject | DIODES | - |
dc.title | Rational design, synthesis, and characterization of a photocrosslinkable hole-transporting polymer for high performance solution-processed thermally activated delayed fluorescence OLEDs | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Cho, Min Ju | - |
dc.contributor.affiliatedAuthor | Choi, Dong Hoon | - |
dc.identifier.doi | 10.1039/c9tc07107e | - |
dc.identifier.scopusid | 2-s2.0-85082850729 | - |
dc.identifier.wosid | 000526890100031 | - |
dc.identifier.bibliographicCitation | JOURNAL OF MATERIALS CHEMISTRY C, v.8, no.13, pp.4572 - 4579 | - |
dc.relation.isPartOf | JOURNAL OF MATERIALS CHEMISTRY C | - |
dc.citation.title | JOURNAL OF MATERIALS CHEMISTRY C | - |
dc.citation.volume | 8 | - |
dc.citation.number | 13 | - |
dc.citation.startPage | 4572 | - |
dc.citation.endPage | 4579 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalResearchArea | Physics | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Physics, Applied | - |
dc.subject.keywordPlus | LIGHT-EMITTING DEVICES | - |
dc.subject.keywordPlus | EFFICIENCY | - |
dc.subject.keywordPlus | LAYER | - |
dc.subject.keywordPlus | BLUE | - |
dc.subject.keywordPlus | DIODES | - |
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