High-triplet-energy poly 9,9′-bis(2-ethylihexyl)-3,6-fluorene) as host for blue and green phosphorescent complexes

A novel polyfluorene with high triplet energy level the soluble conjugated homopolymer poly(9,9'-bis(2-ethylhexyl)-3,6-fluorene)) (P36EHF) is successfully synthesized and characterized. Preliminary results indicate that P36EHF could be a good host material for green and blue phosphorescent complexes (see figure), making it a wide-bandgap conjugated polymer host suitable for blue or green-phosphorescent polymer LEDs.