Ultraviolet electroluminescence and blue-green phosphorescence using an organic diphosphine oxide charge transporting layer
- 1 May 2006
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 88 (18) , 183503
- https://doi.org/10.1063/1.2193429
Abstract
We report electroluminescence at 338 nm from a simple bilayer organic light-emitting device (OLED) made using 4 , 4 ′ -bis(diphenylphosphine oxide) biphenyl (PO1). In an OLED geometry, the material is preferentially electron transporting. Doping the PO1 layer with iridium(III)bis(4,6-(di-fluorophenyl)-pyridinato- N , C 2 ′ )picolinate (FIrpic) gives rise to electrophosphorescence with a peak external quantum efficiency of 7.8% at 0.09 mA ∕ cm 2 and 5.9% at 13 mA ∕ cm 2 . The latter current density is obtained at 6.3 V applied forward bias.Keywords
This publication has 21 references indexed in Scilit:
- New Biphenyl Derivative with Planar Phenyl−Phenyl Conformation in Crystal at Room Temperature Exhibits Highly Efficient UV Light-EmittingThe Journal of Physical Chemistry B, 2004
- Efficient, deep-blue organic electrophosphorescence by guest charge trappingApplied Physics Letters, 2003
- Blue organic electrophosphorescence using exothermic host–guest energy transferApplied Physics Letters, 2003
- Endothermic energy transfer: A mechanism for generating very efficient high-energy phosphorescent emission in organic materialsApplied Physics Letters, 2001
- Combinatorial fabrication and studies of intense efficient ultraviolet–violet organic light-emitting device arraysApplied Physics Letters, 2001
- Molecular weight dependent electroluminescence of silicon polymer near-ultraviolet light-emitting diodesJournal of Applied Physics, 2000
- Near-ultraviolet electroluminescent performance of polysilane-based light-emitting diodes with a double-layer structureJournal of Applied Physics, 2000
- New Dendritic Materials as Potential OLED Transport and Emitter MoeitiesMRS Proceedings, 2000
- Near-ultraviolet electroluminescence from polysilanesThin Solid Films, 1998
- Room-temperature near-ultraviolet electroluminescence from a linear silicon chainApplied Physics Letters, 1997