DC Field | Value | Language |
---|---|---|
dc.contributor.author | Lee, Young Hoon | ko |
dc.contributor.author | Lee, Donggyun | ko |
dc.contributor.author | Lee, Taehwan | ko |
dc.contributor.author | Lee, Junseung | ko |
dc.contributor.author | Jung, Jaehoon | ko |
dc.contributor.author | Yoo, Seunghyup | ko |
dc.contributor.author | Lee, Min Hyung | ko |
dc.date.accessioned | 2021-04-20T04:10:12Z | - |
dc.date.available | 2021-04-20T04:10:12Z | - |
dc.date.created | 2021-04-19 | - |
dc.date.issued | 2021-04 | - |
dc.identifier.citation | DYES AND PIGMENTS, v.188 | - |
dc.identifier.issn | 0143-7208 | - |
dc.identifier.uri | http://hdl.handle.net/10203/282469 | - |
dc.description.abstract | Two pairs of para-donor-appended triarylboron compounds that are derived from 9,9-dialkylacridine (9,9-dimethylacridine (DMAC) or 9,9-diphenylacridine (DPAC)) donors and boryl (9-boraanthryl (BA) or dimesitylboryl (BMes(2))) acceptors are prepared and characterized. X-ray diffraction studies reveal that the BA ring is nearly orthogonal to the phenylene linker, whereas the BMes(2) moiety is tilted by ca. 60 degrees. The BA-containing compounds exhibit blue thermally activated delayed fluorescence (TADF) in both the solution and film states. In contrast, BMes(2)-containing compounds display normal blue fluorescence in solution, while TADF is induced in their films. The small Delta E-ST values (<0.1 eV) and high k(RISC) (ca. 10(6) s(-1)) of the doped films of the BA-containing compounds support the strong TADF character with the short-lived delayed fluorescence (tau(d) = 1.6-2.0 mu s). The theoretical studies along with the experimental results reveal that the electronic transitions in the BA-containing compounds proceed by the stronger charge transfer from the donor to the acceptor moieties than the BMes(2)-containing compounds. Pure to deep blue TADF-OLEDs are realized with all compounds as the dopants. The devices employing the DMAC donor-based emitters exhibit high device performance with a maximum external quantum efficiency (EQE) of 21.3%. However, lower EQEs (<12.8%) and severe efficiency roll-off are observed for the devices with the DPAC donor-based emitters. | - |
dc.language | English | - |
dc.publisher | ELSEVIER SCI LTD | - |
dc.title | Impact of boryl acceptors in para-acridine-appended triarylboron emitters on blue thermally activated delayed fluorescence OLEDs | - |
dc.type | Article | - |
dc.identifier.wosid | 000632564900004 | - |
dc.identifier.scopusid | 2-s2.0-85101126570 | - |
dc.type.rims | ART | - |
dc.citation.volume | 188 | - |
dc.citation.publicationname | DYES AND PIGMENTS | - |
dc.identifier.doi | 10.1016/j.dyepig.2021.109224 | - |
dc.contributor.localauthor | Yoo, Seunghyup | - |
dc.contributor.nonIdAuthor | Lee, Young Hoon | - |
dc.contributor.nonIdAuthor | Lee, Taehwan | - |
dc.contributor.nonIdAuthor | Lee, Junseung | - |
dc.contributor.nonIdAuthor | Jung, Jaehoon | - |
dc.contributor.nonIdAuthor | Lee, Min Hyung | - |
dc.description.isOpenAccess | N | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | Thermally activated delayed fluorescence | - |
dc.subject.keywordAuthor | Blue OLEDs | - |
dc.subject.keywordAuthor | Para-donor-acceptor | - |
dc.subject.keywordAuthor | Triarylboron | - |
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