Abstract

Multilayer organic light emitting diodes (OLEDs) have recently been intensively studied [1,2] for future applications in large-area flat panel color displays. The principle of operation is similar to that of inorganic light emitting diodes (LEDs). Holes and electrons are injected from opposite electrodes into the organic layer sequence and recombine generating singlet excitons that decay radiatively. The emission layer consists of highly fluorescent organic dye molecules sandwiched between separate hole and electron transport layers. This multilayer structure allows to achieve bright electroluminescent emission in the visible spectral region at low driving voltages. We discuss the growth and characterization of high brightness double heterostructure diodes in the green spectral region and present results obtained from organic multiple quantum well light emitting diodes.

© 1995 Optical Society of America