Optoelectronic Properties Of The Red Light-Emission Chelating Electrophosphorescent Polymers

Photo luminesence, electrochemical and electroluminescent properties of the chelating electrophosphorescent polymers with red light-emission were investigated in this paper. The device performances of the polymers were improved by optimizing the structure. Mixing PBD in emission layer was found to decrease the luminous efficiency, but the device performances were enhanced by inserting PVK layer because of the energy transfer from PVK to the chelating polymer. The best performance was achieved in device ITO/PEDOT/PVK/ PFBtpIrm5/Ba/Al with the maximal external quantum efficiency of 4.25 at the CIE coordinates of (0.69,0.29).