Ultraviolet Electroluminescence and Blue-Green Phosphorescence using an Organic Diphosphine Oxide Charge Transporting Layer.

Journal Article · Mon May 01 04:00:00 EDT 2006 · Applied Physics Letters, 88:Art. no. 183503

DOI:https://doi.org/10.1063/1.2193429· OSTI ID:885462

Burrows, Paul E; Padmaperuma, Asanga B; Sapochak, Linda S; Djurovich, Peter I; Thompson, Mark E

We report electroluminescence with a peak wavelength 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, C2’)picolinate (FIrpic) gives rise to electrophosphorescence with a peak external quantum efficiency of 7.8% at 0.09 mA/cm2 and 5.8% at 13 mA/cm2. The latter current density is obtained at 6.3 V applied forward bias. This represents a new class of wide-bandgap charge transporting organic materials which may prove useful as host materials for blue electrophosphoresent OLEDs.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (US)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 885462
• Report Number(s): PNNL-SA-48236; 830403000
• Journal Information: Applied Physics Letters, 88:Art. no. 183503, Journal Name: Applied Physics Letters, 88:Art. no. 183503 Vol. 88; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BIPHENYL
CHARGE TRANSPORT
ELECTROLUMINESCENCE
LIGHT EMITTING DIODES
PHOSPHINE OXIDES
PHOSPHORESCENCE
QUANTUM EFFICIENCY
WAVELENGTHS