Yeoh, K.H. and Talik, N.A. and Whitcher, T.J. and Ng, C.Y.B. and Woon, K.L. (2014) The efficiency enhancement of single-layer solution-processed blue phosphorescent organic light emitting diodes by hole injection layer modification. Journal of Physics D: Applied Physics, 47 (205103). pp. 1-6. ISSN 0022-3727, DOI https://doi.org/10.1088/0022-3727/47/20/205103.
Full text not available from this repository.Abstract
Poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) PEDOT : PSS is extensively used as a hole injection layer (HIL) in solution-processed organic light emitting diodes (OLEDs). The high work function of a HIL is crucial in improving OLED efficiency. The work function of PEDOT : PSS is usually around 5.1–5.3 eV. By adding perfluorinated ionomer (PFI), the work function of PEDOT : PSS has been reported to reach as high as 5.95 eV. We investigated the effects of PFI-modified PEDOT : PSS in a single-layer solution-processed blue phosphorescent OLED (PHOLED). We observed that high concentrations of a PFI in PEDOT : PSS has detrimental effects on the device efficiency due to the low conductivity of the PFI. Using this approach, blue PHOLEDs with efficiencies of 9.4 lm W−1 (18.2 cd A−1) and 7.9 lm W−1 (20.4 cd A−1) at 100 cd m−2 and 1000 cd m−2, respectively, were demonstrated.
| Item Type: | Article |
|---|---|
| Funders: | UNSPECIFIED |
| Uncontrolled Keywords: | Perfluorinated ionomer; PEDOT:PSS; Blue organic light emitting diode (OLED); Solution-processed method |
| Subjects: | Q Science > Q Science (General) |
| Divisions: | Faculty of Science |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 10 Mar 2015 07:23 |
| Last Modified: | 10 Mar 2015 07:23 |
| URI: | http://eprints.um.edu.my/id/eprint/12989 |
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