We report the synthesis of pyrene derivatives as the light emissive layer for highly efficient organic electroluminescence (EL) diodes. Multilayer devices were fabricated with pyrene derivatives (ITO/NPB (50 nm)/blue material (30 nm)/BCP (10 nm)/Alq3 (30 nm)/LiF (1 nm)/Al). By using 1,1′-dipyrene (DP) and 1,4-dipyrenyl benzene (DPB), the devices produced the blue EL emissions with 1931 Commission International de L'Eclairage coordinates of (x = 0.21, y = 0.35) and (x = 0.19, y = 0.25), respectively. The device with DPB shows a maximum brightness of 42,445 cd/m2 at 400 mA/cm2 and the luminance efficiency of 8.57 cd/A and 5.18 lm/W at 20 mA/cm2.
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics