We have fabricated polymeric light-emitting diodes(PLEDs), utilizing inorganic phosphor based on Strontium Aluminate as dopant. It was used the two types of polymeric LEDs as follows: 1) ITO/PVK/Al and 2) ITO/phosphor doped PVK/Al. The EL onset voltage is about 6.5 V for the latter device, lower than the former with a voltage of 12 V. By doping with inorganic the phosphor, the maximum luminescence value is about 23 times higher than the pure PVK device.