Author/Authors :
Liu، نويسنده , , Yu and Li، نويسنده , , Jingdian and Li، نويسنده , , Chun and Song، نويسنده , , Jungeng and Zhang، نويسنده , , Youlong and Peng، نويسنده , , Junbiao and Wang، نويسنده , , Xiayu and Zhu، نويسنده , , Meixiang and Cao، نويسنده , , Yong and Zhu، نويسنده , , Weiguo، نويسنده ,
Abstract :
Using a europium complex containing bromine groups as a guest dopant and a blend of poly(9,9-dioctylfluorene) and 2-tert-butylphenyl-5-biphenyl-1,3,4-oxadiazole as a host matrix, the polymer light-emitting devices exhibited bright red electroluminescent emissions at 612 nm with a full width at half maximum of 19 nm. The different spectral characteristics of photoluminescence and electroluminescence were analyzed. Highly efficient emission was observed in the devices with a maximum external quantum efficiency of 1.4% at 1.5 mA/cm2 and a peak luminance of 278 cd/m2 at 50.0 mA/cm2.
