Organic electroluminescent devices using poly(vinylidene fluoride-co-hexafluoropropylene) doped with triphenylamine derivative as a hole-transporting layer

Eunjung Kang; Jihwan H. Keum; Jae-Gyoung Lee; Youngkyoo Kim; Won-Jei Cho; Chang-Sik Ha

doi:10.1117/12.305438

17 April 1998 Organic electroluminescent devices using poly(vinylidene fluoride-co-hexafluoropropylene) doped with triphenylamine derivative as a hole-transporting layer

Eunjung Kang, Jihwan H. Keum, Jae-Gyoung Lee, Youngkyoo Kim, Won-Jei Cho, Chang-Sik Ha

Author Affiliations +

Proceedings Volume 3281, Polymer Photonic Devices; (1998) https://doi.org/10.1117/12.305438
Event: Optoelectronics and High-Power Lasers and Applications, 1998, San Jose, CA, United States

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.

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Eunjung Kang, Jihwan H. Keum, Jae-Gyoung Lee, Youngkyoo Kim, Won-Jei Cho, and Chang-Sik Ha "Organic electroluminescent devices using poly(vinylidene fluoride-co-hexafluoropropylene) doped with triphenylamine derivative as a hole-transporting layer", Proc. SPIE 3281, Polymer Photonic Devices, (17 April 1998); https://doi.org/10.1117/12.305438

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