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Silane- and triazine-containing hole and exciton blocking material for high-efficiency phosphorescent organic light emitting diodes
| Content Provider | Semantic Scholar |
|---|---|
| Author | Kang, Jae-Wook Lee, Deug-Sang Park, Hyung-Ki Park, Young-Seo Kim, Ji Whan Jeong, Won-Ik Yoo, Kyung-Mo Go, Kyoungmoon Kim, Se Hoon Kim, Jang-Joo |
| Copyright Year | 2007 |
| Abstract | One of the important factors for high efficiency phosphorescent organic light-emitting devices is to confine triplet excitons within the emitting layer. We synthesized and characterized a new hole blocking material containing silane and triazine moieties, 2,4-diphenyl-6-(4′-triphenylsilanyl-biphenyl-4-yl)-1,3,5-triazine (DTBT). Electrophosphorescent devices fabricated using the material as the hole-blocking layer and N,N′-dicarbazolyl-4,4′-biphenyl (CBP) doped with fac-tris(2-phenylpyridine)iridium [Ir(ppy)3] as the emitting layer showed a maximum external quantum efficiency (ηext) of 17.5% with a maximum power efficiency (ηp) of 47.8 lm W−1, which are much higher than those of devices using bathcuproine (BCP) (ηext = 14.5%, ηp = 40.0 lm W−1) and 4-biphenyloxolate aluminium(III) bis(2-methyl-8-quinolinato)-4-phenylphenolate (BAlq) (ηext = 8.1%, ηp = 14.2 lm W−1) as hole-blocking layers. |
| Starting Page | 3714 |
| Ending Page | 3719 |
| Page Count | 6 |
| File Format | PDF HTM / HTML |
| DOI | 10.1039/B705741E |
| Volume Number | 17 |
| Alternate Webpage(s) | http://s-space.snu.ac.kr/bitstream/10371/7014/1/JMaterChem_17_3714.pdf |
| Alternate Webpage(s) | https://doi.org/10.1039/B705741E |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
