6533b82cfe1ef96bd128f37b
RESEARCH PRODUCT
Solution processable high band gap hosts based on carbazole functionalized cyclic phosphazene cores for application in organic light‐emitting diodes
Henk J. BolinkEvan L. WilliamsAlan SellingerAlan SellingerSonsoles Garcia SantamariaMarta Pérez-moralesMarta Pérez-moralesMui Siang Sohsubject
Conductive polymerOrganic electronicsMaterials sciencePolymers and PlasticsCarbazoleElectroluminescenceCondensed Matter PhysicsPhotochemistrychemistry.chemical_compoundchemistryChemical engineeringDendrimerMaterials ChemistryOLEDPhysical and Theoretical ChemistryPhosphorescencePhosphazenedescription
A new class of solution processable dendrimers based on cyclic phosphazene (CP) cores have been prepared and used as host materials for blue and green organic light emitting diodes (OLEDs). The dendrimers are prepared in high yield from minimal step reactions, are soluble in common solvents for solution processing, are amorphous, and have excellent thermal properties necessary for application in OLEDs. OLED efficiencies of 10.3 cd/A (4.2 Im/W) and 35.3 cd/A (33.5 Im/W) were achieved using commercially available Flrpic and Ir(mppy) 3 as blue and green phosphorescent emitters, respectively. These efficiencies were 2x higher than control devices prepared using poly(N-vinylcarbazole), the most commonly used host material in solution processed phosphorescent OLEDs.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-01-03 | Journal of Polymer Science Part B: Polymer Physics |