Full metadata record
DC Field | Value | Language |
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dc.contributor.author | Hong, Soojin | ko |
dc.contributor.author | Chung, Won Jae | ko |
dc.contributor.author | Jang, Seokhoon | ko |
dc.contributor.author | Yu, Gyeonghwa | ko |
dc.contributor.author | Lee, Jun Yeob | ko |
dc.contributor.author | Lee, Youngu | ko |
dc.date.accessioned | 2021-01-22T06:49:33Z | - |
dc.date.available | 2021-01-22T06:49:33Z | - |
dc.date.created | 2020-05-29 | - |
dc.date.issued | 2020-10 | - |
dc.identifier.citation | Dyes and Pigments, v.181, pp.108534 | - |
dc.identifier.issn | 0143-7208 | - |
dc.identifier.uri | http://hdl.handle.net/20.500.11750/12610 | - |
dc.description.abstract | Many researchers have reported dibenzo[b,d]furan segment as a building block of organic light-emitting diode (OLED) materials because it has high thermal stability and triplet energy. However, most of the research has focused on symmetrically substituting the same functional groups at 2-position due to easy functionalization or substituting the same functional groups at different positions of dibenzo[b,d]furan. Herein, we design and synthesize three new hole blocking materials based on asymmetrically difunctionalized dibenzo[b,d]furan, diphenyl (2-(pyridin-3-yl)dibenzo[b,d]furan-6-yl)phosphine oxide (DBFPO-Py), diphenyl(2-(pyrimidin-5-yl)dibenzo[b,d]furan-6-yl)phosphine oxide (DBFPO-Pyr), and diphenyl(2-(4-(triphenylsilyl)phenyl)dibenzo[b,d]furan-6-yl)phosphine oxide (DBFPO-Si) for high-performance phosphorescent OLEDs. Phosphine oxide, tetraphenylsilane, pyridine, and pyrimidine segments are successfully introduced into the asymmetric position of a dibenzo[b,d]furan. It is found that DBFPO-Py, DBFPO-Pyr, and DBFPO-Si possess high thermal stability; high triplet energies of 2.96, 2.98, and 2.80 eV; and deep highest occupied molecular orbital (HOMO) energy levels of −7.13, −7.23 and −7.07 eV; respectively. Blue phosphorescent OLEDs with DBFPO-Py, DBFPO-Pyr, and DBFPO-Si show low turn-on voltages, high current and power efficiencies, and superior external quantum efficiencies. Blue phosphorescent OLEDs with DBFPO-Py and DBFPO-Pyr showed improved performance in terms of current and power efficiencies, etc, compared with the device with 1,3-bis(3,5-dipyrid-3-yl-phenyl)benzene (BmPyPB), which is commonly used as a hole blocking layer. More importantly, the blue phosphorescent OLEDs with DBFPO-Pyr showed the best performance with maximum external quantum efficiency of 23.6%, current efficiency of 29.8 cd A−1, power efficiency of 26.0 lm W−1, and low efficiency roll-off of 6.38%. Novel hole blocking materials based on asymmetrically difunctionalized dibenzo[b,d]furan are expected to make a significant contribution to the development of blue phosphorescent OLEDs. © 2020 Elsevier Ltd | - |
dc.language | English | - |
dc.publisher | Elsevier BV | - |
dc.title | Asymmetrically difunctionalized dibenzo[b,d]furan-based hole blocking materials for high-performance blue phosphorescent organic light-emitting diodes | - |
dc.type | Article | - |
dc.identifier.doi | 10.1016/j.dyepig.2020.108534 | - |
dc.identifier.wosid | 000549169800030 | - |
dc.identifier.scopusid | 2-s2.0-85084943383 | - |
dc.type.local | Article(Overseas) | - |
dc.type.rims | ART | - |
dc.description.journalClass | 1 | - |
dc.contributor.nonIdAuthor | Chung, Won Jae | - |
dc.contributor.nonIdAuthor | Lee, Jun Yeob | - |
dc.identifier.citationVolume | 181 | - |
dc.identifier.citationStartPage | 108534 | - |
dc.identifier.citationTitle | Dyes and Pigments | - |
dc.type.journalArticle | Article | - |
dc.description.isOpenAccess | N | - |
dc.subject.keywordAuthor | OLED | - |
dc.subject.keywordAuthor | Phosphorescence | - |
dc.subject.keywordAuthor | Hole blocking | - |
dc.subject.keywordAuthor | Triplet energy | - |
dc.subject.keywordAuthor | Phosphine oxide | - |
dc.subject.keywordPlus | ELECTRON-TRANSPORT MATERIALS | - |
dc.subject.keywordPlus | HIGH TRIPLET ENERGY | - |
dc.subject.keywordPlus | HIGH-EFFICIENCY | - |
dc.subject.keywordPlus | HOST MATERIAL | - |
dc.subject.keywordPlus | DESIGN | - |
dc.subject.keywordPlus | LAYER | - |
dc.subject.keywordPlus | TETRAPHENYLSILANE | - |
dc.subject.keywordPlus | TEMPERATURE | - |
dc.subject.keywordPlus | DEVICES | - |
dc.subject.keywordPlus | GREEN | - |
dc.contributor.affiliatedAuthor | Lee, Youngu | - |
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