Organic materials for white electroluminescence

White organic light emitting diodes (WOLEDs) represent a promising alternative to incandescent or fluorescent lamps and inorganic LEDs for low energy consumption lighting applications. WOLEDs combine the potentialities of high white color quality and low production costs with the distinctive feature of being available also as flexible and large area devices. Moreover, fine control of white color quality can be easily achieved by proper chemical design of organic electroluminescent materials. Here we survey the main chemical approaches to white organic electroluminescence, highlighting strong and weak points of each strategy