Universal Display Corporation is engaged in the research, development and commercialization of organic light emitting diode (OLED), technologies and materials for use in display and solid-state lighting applications. The Company also supplies its OLED materials to manufacturers of OLED displays and lighting products for evaluation and for use in product development and for pre-commercial activities, and it also provides technical assistance and support to these manufacturers. The Company has produced and sold phosphorescent emitter materials that produce red, yellow, green and light-blue light, which are combined in various ways for the display and lighting markets. It has also developed host materials for the emissive layer. The Company is a supplier of phosphorescent emitter materials to OLED product manufacturers. Phosphorescent OLEDs utilize specialized materials and device structures that allow OLEDs to emit light through a process known as phosphorescence.