Photoluminescent and electroluminescent investigations of OLEDs using Alq2-Nq

Light-emitting display is one of the information display techniques that utilize conversion of electrical energy into light energy. In this study, new luminescent material, 1,4-dihdoxy-5,8-naphtquinone·Alq3 complex (Alq2-Nq) was synthesized. And extended efforts had been made to obtain high-performance electroluminescenct (EL) devices, since the first report of organic light-emitting diodes (OLEDs) based on Tris(8-hydroxyquinoline) aluminium (Alq3). We used hole injection layer of powdered TPD to improve hole injection and characteristics of interface in OLEDs. Current-voltage characteristics, luminance-voltage characteristics and luminous efficiency were measured by Flat Panel Display Analysis System (Model 200-AT) at room temperature. PL spectra is measured by LS45 (Perkin-Elmer instruments) at room temperature.