Abstract
Poly[(9,9-dioctylfluorenyl-2,7-diyl)-alt-(benzo[2,1,3]thiadiazol-4,7-diyl)] (F8BT) and 4-(Dicyanomethylene)-2-tert-butyl-6-(1,1,7,7-tetramethyljulolidin-4-yl-vinyl)-4H-pyran (DCJTB) were drop-casted over screen-printed AC powder electroluminescent (ACPEL) devices to tune the emission color from blue ZnS phosphors. Yellow and red emissions with peak wavelengths of 548 nm and 630 nm were obtained for the hybrid ACPEL devices. By changing the mass ratio and concentrations of the F8BT and DCJTB mixture, colors ranging from green to pink were achieved. White color with the Commission Internationale de l'Eclairage (CIE) coordinates of (0.313, 0.312) was obtained. In electroluminescence (EL) and white light aging studies lasting 114.25 hours, F8BT was found to be more stable than DCJTB, which degraded fast under both conditions.
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