https://scholars.lib.ntu.edu.tw/handle/123456789/342712
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.author | Yun Chi, | en_US |
dc.contributor.author | Yi-Hwa Chiu, | en_US |
dc.contributor.author | Yuan-Chieh Chi, | en_US |
dc.contributor.author | Cheng, Yi-Ming | en_US |
dc.contributor.author | Lai, Cheng-Hsuan | en_US |
dc.contributor.author | PI-TAI CHOU | en_US |
dc.contributor.author | KEN-TSUNG WONG | en_US |
dc.contributor.author | Tsai, Ming-Han | en_US |
dc.contributor.author | CHUNG-CHIH WU | en_US |
dc.creator | Yun Chi;Yi-Hwa Chiu;Yuan-Chieh Chi;Cheng, Yi-Ming;Lai, Cheng-Hsuan;Chou, Pi-Tai;Wong, Ken-Tsung;Tsai, Ming-Han;Wu, Chung-Chih | - |
dc.date.accessioned | 2018-09-10T07:08:44Z | - |
dc.date.available | 2018-09-10T07:08:44Z | - |
dc.date.issued | 2008-06 | - |
dc.identifier.issn | 09476539 | - |
dc.identifier.uri | http://scholars.lib.ntu.edu.tw/handle/123456789/342712 | - |
dc.identifier.uri | https://www.scopus.com/inward/record.uri?eid=2-s2.0-53849131360&doi=10.1002%2fchem.200800050&partnerID=40&md5=bd55c385822071ef440a9a8ec8362ece | - |
dc.description.abstract | A series of blue phosphorescent iridium(III) complexes 1-4 with nonconjugated N-benzylpyrazole ligands were synthesized and their structural, electrochemical, and photophysical properties were investigated. Complexes 1-4 exhibit phosphorescence with yields of 5-45% in degassed CH2Cl 2. Of the compounds, 1 showed emission that was nearly true blue at 460 nm with a lack of vibronic progression. These photophysical data clearly demonstrate that the methylene spacer of the cyclometalated N-benzylpyrazole chelate effectively interrupts the π conjugation upon reacting with a third L∧X chelating chromophore. This gives a feasible synthesis for the blue phosphorescent complexes with a sufficiently large energy gap. In another approach, these complexes were investigated for their suitability for the host material in phosphorescent OLEDs. The device was synthesized by using 1 as the host for the green-emitting [Ir-(PPy)3] dopant, which exhibits an external quantum conversion efficiency (EQE) of up to 11.4% photons per electron (and 36.6 cd A-1), with 1931 Commission Internationale de L'E-clairage (CIE) coordinates of (0.30, 0.59), a peak power efficiency of 21.7 lmW-1, and a maximum brightness of 32000 cdm-2 at 14.5 V. At the practical brightness of 100 cdm-2, the efficiency remains above 11% and 18 lmW-1, demonstrating its great potential as the host material for phosphorescent organic light-emitting diodes. © 2008 Wiley-VCH Verlag GmbH & Co. KGaA. | - |
dc.language | en | en |
dc.relation.ispartof | Chemistry-A European Journal | en_US |
dc.source | AH-anncc | - |
dc.subject | Conjugation; Cyclometalation; Energy transitions; Iridium; Phosphorescence | - |
dc.subject.classification | [SDGs]SDG7 | - |
dc.subject.other | Electrochemical properties; Iridium; Ligands; Light emission; Luminescence; Phosphorescence; Conjugation; Cyclometalated ligands; Cyclometalation; Energy transitions; Iridium complexes; Nonconjugated; Photo-physical properties; Iridium compounds | - |
dc.title | Phosphorescent iridium(III) complexes with nonconjugated cyclometalated ligands | - |
dc.type | journal article | en |
dc.identifier.doi | 10.1002/chem.200800050 | - |
dc.identifier.scopus | 2-s2.0-53849131360 | - |
dc.identifier.isi | WOS:000257574800008 | - |
dc.relation.pages | 5423-5434 | - |
dc.relation.journalvolume | 14 | - |
dc.relation.journalissue | 18 | - |
item.openairecristype | http://purl.org/coar/resource_type/c_6501 | - |
item.openairetype | journal article | - |
item.grantfulltext | none | - |
item.cerifentitytype | Publications | - |
item.fulltext | no fulltext | - |
crisitem.author.dept | Chemistry | - |
crisitem.author.dept | Center for Emerging Material and Advanced Devices | - |
crisitem.author.dept | Chemistry | - |
crisitem.author.dept | Electrical Engineering | - |
crisitem.author.dept | Office of Research and Development | - |
crisitem.author.orcid | 0000-0002-8925-7747 | - |
crisitem.author.orcid | 0000-0002-1680-6186 | - |
crisitem.author.parentorg | College of Science | - |
crisitem.author.parentorg | Others: University-Level Research Centers | - |
crisitem.author.parentorg | College of Science | - |
crisitem.author.parentorg | College of Electrical Engineering and Computer Science | - |
crisitem.author.parentorg | Administrative Unit | - |
顯示於: | 電機工程學系 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。