Red Fluorescent 4-(Dicyanomethylene)-2- (1-pentylbicyclo[2,2,2]oct-4-yl)-6-(1,1,2,2,7,7-hexamethyljulolidyl-9-enyl)-4H-pyran (DCHMJPB) for Organic Light-Emitting Diodes (OLEDs)

摘要: An efficient red fluorescent compound, 4-(Dicyanomethylene)-2-(1-pentylbicyclo- [2,2,2]oct-4-yl)-6-(1,1,2,2,7,7-hexamethyljulolidyl-9-enyl)-4H-pyran (DCHMJPB) containing two additional methyl groups on julolidine moiety and 1-pentylbicyclo- [2,2,2]octyl group pyran moiety, was synthesized characterized. In this emitter, the bulky such as were introduced to increase steric hindrance between emitters prevent concentration quenching. particular, in an device emitter DCHMJPB a dopant, luminous power efficiency of 3.76 cd/A 1.97 lm/W achieved, respectively, at 20 mA/cm2 with CIE coordinates (x = 0.56, y 0.42) 7.0V.