P‐115: Efficient Blue Organic Electroluminescent Devices Based on a Stable Blue Host Material

Abstract

Abstract We have successfully synthesized a new blue host material, 2‐methyl‐9,10‐di(2‐napthyl)anthracene (MADN) which is highly stable in thin‐film morphology comparing to the archetypical 9,10‐di(2‐napthyl)anthracene (ADN). When doped with 2,5,8,11‐tetra(t‐butyl)perylene (TBP) as blue emitter in organic light emitting device (OLED), MADN shows an improved EL efficiency of 4.4 cd/A and 2.2 lm/W at 20 mA/cm 2 and 6.3 V with a CIE x, y coordinate of (0.14, 0.20). The blue device is stable with an extrapolated t 1/2 ∼5000 h at an initial brightness of 880 cd/m 2 .