Synthesis Alq3and effect of concentration iton optical and electrical performance of Organic Light Emitting Diodes withtwo single-layer mixture and multilayer structures

In this article, organic light emitting diode with the two structures of ITO / PEDOT: PSS /PVK/Alq3/PBD/Al and ITO/PEDOT: PSS/PVK: Alq3: PBD/Alwith different concentrations were fabricated. The effects of concentration of Alq3 complex on the characteristics of diodes, which were made, were studied. Layers with the same weight percentages PVK, PBD and different wt. %Alq3 by spin coating on PEDOT: PSS layer was deposited. Current - voltage characteristic curve - and luminescence (El) were studied. Experimental results showed that by increasing the concentration of the Alq3complexin both structure, luminescence increased and the operating voltage is reduced.