INFLUENCE OF POLY(METHYLMETHACRYLATE) 8-HYDROXYQUINOLINE DERIVATIVE METAL-COMPLEXES ELECTROLUMINESCENCE

A new method is presented of enhancing the organic electroluminescent (EI,) efficiency by using poly (methylmethacrylate) (PMMA) as barrier layers which play the role of controlling the electron-hole recombinat ion in the organic EL materials. The organic EL device with one layer of 8-hydroxyquinoline derivative-metal complexes (Alq3, Znq2) as the E L-emitting layers, and two layers of EL emitting materials deposited o n PMMA Langmuir-Blodgett films (PMMA/Alq3, PMMA/Znq2) sandwiched betwe en indium/tin oxide (ITO) and aluminum electrodes have been fabricated , respectively. The evidence reveals that the LB film takes an importa nce to raising the 8-hydroxyquinoline derivative-metal complexes EL ef ficiency.