Covers recent progress and developments on the electroluminescent and photoluminescent properties of fullerene, chelate metal compounds, polythiophenes, poly (p-phylene vinylenes), polyxadiazoles, poly (vinyl carbazoles), polysilanes and many other organic materials. A wide range of organic electroluminescent materials and their based technologies are discussed by leading experts working in industry and academic institutes. The current status of this field is reviewed in state-of-the-art chapters providing specified applications with examples. Electroluminescent materials glow in a full colour range, including white, green, blue, red and violet. Their usefulness in panel displays, backlights of liquid crystal displays, indicators lights, and as a light source for optical communications is discussed.