Highly Efficient Red Phosphorescent OLEDs with Simple Device Structure
- 10 November 2009
- journal article
- research article
- Published by Taylor & Francis in Molecular Crystals and Liquid Crystals
- Vol. 513 (1), 227-235
- https://doi.org/10.1080/15421400903210236
Abstract
We report high efficiency red phosphorescent OLEDs with a simple organic bi-layered structure. A host material bis(10-hydroxybenzo[h] quinolinato)beryllium complex (Bebq2) having a good electron transporting and energy transfer characteristics and a good hole injection and transport material N,N′-di(4-(N,N′-diphenyl-amino)phenyl)-N,N′-diphenylbenzidine (DNTPD) lead to the fabrication of simplified high efficiency device. The driving voltage value of 3.5 V to reach luminance of 1000 cd/m2 is reported. The maximum current- and power-efficiency values of 9.38 cd/A and 11.72 lm/W with real true red color of (0.67, 0.32) are demonstrated.Keywords
This publication has 14 references indexed in Scilit:
- Efficient simple structure red phosphorescent organic light emitting devices with narrow band-gap fluorescent hostApplied Physics Letters, 2008
- White Organic Light‐Emitting Devices for Solid‐State LightingAdvanced Materials, 2004
- Color Tunable Organic Light‐Emitting Diodes Using Pentafluorophenyl‐Substituted Iridium ComplexesAdvanced Materials, 2003
- Highly Efficient Polymer Light-Emitting Devices Using a New Phosphorescent MaterialChinese Physics Letters, 2003
- Energy transfer in polymer electrophosphorescent light emitting devices with single and multiple doped luminescent layersJournal of Applied Physics, 2002
- Endothermic energy transfer: A mechanism for generating very efficient high-energy phosphorescent emission in organic materialsApplied Physics Letters, 2001
- Efficient electrophosphorescence using a doped ambipolar conductive molecular organic thin filmOrganic Electronics, 2001
- Very high-efficiency green organic light-emitting devices based on electrophosphorescenceApplied Physics Letters, 1999
- Improved energy transfer in electrophosphorescent devicesApplied Physics Letters, 1999
- Highly efficient phosphorescent emission from organic electroluminescent devicesNature, 1998