P.123: Electroluminescence Properties of WOLED with a New Yellow Fluorescent Material

A new yellow fluorescent material, (2Z)‐3‐[4,4“‐bis(dimethylamino)‐1,1‘:4’,1”‐terphenyl‐2‘‐yl]‐2‐phenylacrylonitrile (BDAT‐P), have been synthesized for use in organic light‐emitting diodes. Optoelectronic properties of device with the structure of ITO (180 nm) / NPB (50 nm) / MADN: PFVtPh(SYB‐41) 8 % (17 nm) / CBP (5 nm) / CBP:Ir(pq)2acac 8 % (3 nm) / CBP (5 nm) / MADN:BDAT‐P 8 % (3 nm) / CBP (5 nm) / MADN:SYB‐41 8 % (17 nm) / TPBi (40 nm) / Liq (2 nm) / Al (100 nm) was measured and revealed that BDAT‐P was sufficiently applicable as a dopant of one of emitting layers in white light‐emitting diodes. Maximum luminance of device was measured to be 26950 cd/m2. Maximum luminous and quantum efficiency were observed to be 14.22 cd/A and 6.58 %, respectively. The device emitted warm white light corresponding to Commission Internationale de I'Eclairage (CIExy) coordinates of (0.372, 0.424) at 11 V, (0.375, 0.417) at 12 V, (0.372, 0.409) at 13 V, (0.366, 0.401) at 14 V, and (0.360, 0.393) at 15 V, respectively.