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Proceedings Paper

Organic electroluminescent devices using poly(vinylidene fluoride-co-hexafluoropropylene) doped with triphenylamine derivative as a hole-transporting layer
Author(s): Eunjung Kang; Jihwan H. Keum; Jae-Gyoung Lee; Youngkyoo Kim; Won-Jei Cho; Chang-Sik Ha
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Paper Abstract

Poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP) thin films dispersed molecularly with N,N'-diphenyl-N,N'-di(m- tolyl)benzidine (TPD) were applied as a hole-transporting layer (HTL) for the fabrication of organic electroluminescent (EL) devices. Vacuum-sublimed molecular film of tris(8- hydroxyquinolinato) aluminum (Alq3) was used as an emissive/electron-transporting layer (EM&ETL). The devices have the typical double layer structure of glass substrate/ITO/TPD:PVdF-HFP/Alq3/Al. Two different compositions, 30/70 and 50/50, of TPD in PVdF-HFP film were employed to investigate the dependence of device performance with the contents of the hole-transporting molecule. The turn- on voltage of OELD fabricated with 30/70 composition of TPD was lower than that with 50/50. In addition, the device with lower TPD concentration was more stable and efficient than that with higher concentration. The 30/70 device driven at 9 V emitted a bright green light with a peak wavelength of 511 nm (2.43 eV) under air ambient condition. At 10 V, the brightness was above 5,000 cd/m2.

Paper Details

Date Published: 17 April 1998
PDF: 9 pages
Proc. SPIE 3281, Polymer Photonic Devices, (17 April 1998); doi: 10.1117/12.305438
Show Author Affiliations
Eunjung Kang, Pusan National Univ. (South Korea)
Jihwan H. Keum, Pusan National Univ. (South Korea)
Jae-Gyoung Lee, Institute for Advanced Engineering (South Korea)
Youngkyoo Kim, Institute for Advanced Engineering (South Korea)
Won-Jei Cho, Pusan National Univ. (South Korea)
Chang-Sik Ha, Pusan National Univ. (South Korea)

Published in SPIE Proceedings Vol. 3281:
Polymer Photonic Devices
Bernard Kippelen; Donal D. C. Bradley, Editor(s)

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