This book discusses modern developments in the field of organic electroluminescence, with contributions from several researchers with internationally established expertise in the field. Novel developments give way to flexible, low-cost fabrication techniques for light-emitting materials, primarily in display technologies. The book includes unique contributions on the synthesis of appropriate organic materials, fabrication of natural light emitting devices and natural white light emitting devices, classification of these devices, and a few designs for most favorable performance. The cost effective chemical technology offers many exciting possibilities for organic solar cells (OSCs) and OLEDs to be futuristic solutions for lighting and power generation. An ordinary flexible substrate can be used to produce OLEDs on one surface in front of a room and OSCs on the other surface in front of the sun. Thus, such a device can be used to generate power in the day, and light rooms in the night time. This book discusses all such aspects of such OLEDs, WOLEDs and OSCs as well.