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Organic light emitting diodes or OLEDs originated from the class of LEDs as one of the major display technologies that differs with low power and combination of great colors. OLED technology uses the principle of electroluminescence which can be stated as the optical and electrical phenomenon wherein certain materials emit light in response to an electric current passing through it. These OLEDs are used to create digital displays in devices such as TV screens, computer monitors and portable systems like mobile phones, mp3 players and digital cameras, etc. These diodes are about 100 to 500 nanometers thick and 200 times smaller than human hair.OLED displays are advantageous as they are bright, clear, thin, light in weight, and possess an efficient viewing angle. Apart from this, they can be taken on various surfaces and can be printed on various surfaces. OLED lighting contains no mercury, and thus eliminates the disposal and pollution problems associated with the fluorescent lighting.