8 September 2004 Fabrication and characteristics of flexible layered polymeric electroluminescent diodes fabricated by all-wet process
Author Affiliations +
Abstract
Highly efficiency organic electroluminescent devices employing a phosphorescent dye doped into a wet-processable molecular material have been demonstrated. Methoxy-substituted 1,3,5-tris[4-(diphenylamino)phenyl]benzene (TDAPB) was selected as a host polymer for the phosphorescent dopant fac-tris(2-phenylpyridine) iridium(III) [Ir(ppy)3], and organic films were fabricated by spin-coating method. The peak external quantum efficiency of 8.2 % (29 cd/A), or luminous power efficiency of 17.3 lm/W, and luminance of 33,000 cd/m2 were achieved at a apply voltage of 9.4 V for a 90nm-thick emissive layer. The emission from the host material of TDAPB was not observed in the electroluminescence or photoluminescence spectra. The decrease in efficiencies at a high current is analyzed using the triplet-triplet annihilation model. The high performance is attributed to the simple device structure, excellent film forming properties of the host material, and the efficient energy transfer from the host to dopant.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yutaka Ohmori, Yutaka Ohmori, Yuichi Hino, Yuichi Hino, Hirotake Kajii, Hirotake Kajii, } "Fabrication and characteristics of flexible layered polymeric electroluminescent diodes fabricated by all-wet process", Proc. SPIE 5464, Organic Optoelectronics and Photonics, (8 September 2004); doi: 10.1117/12.545205; https://doi.org/10.1117/12.545205
PROCEEDINGS
8 PAGES


SHARE
RELATED CONTENT


Back to Top