Organic white-light emitting devices

Organic white-light emitting devices(OWLEDs) have tremendous application merits and potential markets.There are mostly two kinds of OWLEDs,one based on electroluminescence(EL),the other on photoluminescence (PL).The main principles of EL are multiple quantum well,exciplex and energy transfer.The organic EL devices have been more investigated and there are products in near future.But for organic PL devices,there are less study.The cost of PL OWLEDs is lower than that of EL OWLEDs,and its fluorescence efficiency may be higher.Therefore OWLEDs stand for a cheap route for luminescent technique.A summary of OWLEDs mechanisms and development are put forward.