Journal
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
Volume 49, Issue 7, Pages 531-539Publisher
WILEY
DOI: 10.1002/polb.22197
Keywords
charge transport; conducting polymers; dendrimers; organic electronics; organic light-emitting diodes; photoluminescence; polyphosphazenes; solution processable
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Funding
- Institute of Materials Research and Engineering (IMRE)
- Agency for Science, Technology and Research (A*STAR)
- European Union (CombOLED) [STRP 215934]
- Generalitat Valenciana
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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 lm/W) and 35.3 cd/A (33.5 lm/W) were achieved using commercially available Flrpic and lr(mppy)(3) as blue and green phosphorescent emitters, respectively. These efficiencies were 2 x higher than control devices prepared using poly(N-vinylcarbazole), the most commonly used host material in solution processed phosphorescent OLEDs. (C) 2011 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 49: 531-539, 2011
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