Yeoh, K.H. and Ng, C.Y.B. and Chua, C.L. and Talik, N.A. and Woon, K.L. (2013) High power efficiency solution-processed double-layer blue phosphorescent organic light-emitting diode by controlling charge transport at the emissive layer and heterojunction. physica status solidi (RRL) - Rapid Research Letters, 7 (6). pp. 421-424. ISSN 1862-6254, DOI https://doi.org/10.1002/pssr.201307089.
Full text not available from this repository.Abstract
We have demonstrated an effective method of enhancing the power efficiency of double–emissive solution-processed blue phosphorescent organic light-emitting diode (PHOLED) by controlling the charge transport in the heterojunction and emissive layer. The first emissive layer consists of poly(vinylcarbazole) (PVK) and bis(4,6 difluorophenylpyridinato-N,C2)picolinatoiridium (FIrpic) mixed with 4,4′,4″-tris(N-carbazolyl)-triphenylamine (TCTA) or 1,3-bis[(4-tert- butylphenyl)-1,3,4 oxidiazolyl] phenylene (OXD-7). The second layer consists of an alcohol-soluble 2,7-bis(diphenylphosphoryl)-9,9′-spirobi[fluorene] (SPPO13) and FIrpic blend. The incorporation of OXD-7 into PVK blurs the interface between the emissive layers and widens the recombination zone while blending TCTA into PVK reduces the hole- injection barrier from PEDOT:PSS to PVK. By adding TCTA or OXD-7 into the first emissive layer, we have achieved a power efficiency of 10 lm/W and 11 lm/W, respectively, at 1000 cd/m2.
| Item Type: | Article |
|---|---|
| Funders: | UNSPECIFIED |
| Uncontrolled Keywords: | Heterojunctions; PHOLED; Blurring effect; Power efficiency |
| Subjects: | Q Science > Q Science (General) Q Science > QC Physics |
| Divisions: | Faculty of Science > Department of Physics |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 10 Mar 2015 04:43 |
| Last Modified: | 10 Mar 2015 04:43 |
| URI: | http://eprints.um.edu.my/id/eprint/12977 |
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