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Spiro-type TADF emitters based on acridine donors and anthracenone acceptor
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Yang, Dongwook | - |
dc.contributor.author | Huh, Jin-Suk | - |
dc.contributor.author | Hong, Jong-In | - |
dc.date.accessioned | 2022-05-16T08:48:09Z | - |
dc.date.available | 2022-05-16T08:48:09Z | - |
dc.date.created | 2022-01-03 | - |
dc.date.created | 2022-01-03 | - |
dc.date.issued | 2022-01-01 | - |
dc.identifier.citation | Dyes and Pigments, Vol.197, p. 109873 | - |
dc.identifier.issn | 0143-7208 | - |
dc.identifier.uri | https://hdl.handle.net/10371/179769 | - |
dc.description.abstract | Two rigid spiro-type TADF emitters (CBZANQ, PXZANQ) were designed and synthesized via a two-step route. CBZANQ and PXZANQ both contain an anthracenone acceptor along with a carbazole-acridine-fused donor and a phenoxazine-acridine-fused donor, respectively, where each donor and acceptor are linked by a spiro bridge to form D-sigma-A structures with an orthogonal arrangement. Both CBZANQ and PXZANQ have the difference between the singlet and triplet energy values (Delta E-ST) of 0.05 eV and 0.03 eV, respectively, which are sufficiently small for efficient triplet harvesting. CBZANQ with a weak electron donor (carbazole) exhibited a weak intramolecular charge transfer (ICT) character, resulting in a low photoluminescence quantum yield (PLQY) of 18%. On the other hand, when combined with a strong electron donor (phenoxazine), PXZANQ exhibited a strong ICT character, resulting in a high PLQY of 71%. Organic light-emitting diode (OLED) devices based on CBZANQ emitter and bis[2-(diphenylphosphino)phenyl] ether oxide (DPEPO) host exhibited sky-blue electroluminescence (EL) at 492 nm with a low external quantum efficiency (EQE) of 6.7%. Conversely, the OLED devices fabricated using PXZANQ emitter and DPEPO host exhibited green emission at 528 nm, along with a high EQE of 22.1%. Additionally, the efficiency of PXZANQ-based devices remained high at high luminance, indicating relatively small efficiency roll-off (13.9% EQE under 500 cd/m(2)). | - |
dc.language | 영어 | - |
dc.publisher | Elsevier BV | - |
dc.title | Spiro-type TADF emitters based on acridine donors and anthracenone acceptor | - |
dc.type | Article | - |
dc.identifier.doi | 10.1016/j.dyepig.2021.109873 | - |
dc.citation.journaltitle | Dyes and Pigments | - |
dc.identifier.wosid | 000712626300003 | - |
dc.identifier.scopusid | 2-s2.0-85117713884 | - |
dc.citation.startpage | 109873 | - |
dc.citation.volume | 197 | - |
dc.description.isOpenAccess | N | - |
dc.contributor.affiliatedAuthor | Hong, Jong-In | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.subject.keywordPlus | ACTIVATED DELAYED FLUORESCENCE | - |
dc.subject.keywordPlus | LIGHT-EMITTING-DIODES | - |
dc.subject.keywordPlus | AGGREGATION-INDUCED EMISSION | - |
dc.subject.keywordPlus | EFFICIENT | - |
dc.subject.keywordAuthor | Organic light emitting diodes | - |
dc.subject.keywordAuthor | Thermally activated delayed fluorescence | - |
dc.subject.keywordAuthor | Spiro-type TADF | - |
dc.subject.keywordAuthor | D-sigma-A structure | - |
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