In this study, we fabricated highly efficient blue organic light-emitting diodes by designing different emitting layer
structures with fluorescent host and dopant materials of 4,4-bis(2,2-diphenylyinyl)-1,10-biphenyl (DPVBi) and 9,10-
bis(2-naphthyl) anthracene (ADN) as host materials and 4,4’-bis(9-ethyl-3-carbazovinylene)-1,1’biphenyl (BCzVBi) as a
dopant material to demonstrate electrical and optical improvements. Best enhancement in luminance and luminous
efficiency were achieved by a quantum well structure and energy transfer between host and dopant materials in device F
as of 8668cd/m2 at 8V and 5.16 Cd/A at 103.20 mA/cm2 respectively. Among the blue OLED devices doped by
BCzVBi, device B emits the deepest blue emission with Commission Internationale de l’E´ clairage (CIExy) coordinates
of (0.157, 0.117) at 8V.