Poly(arylenevinylene) blends for white light emitting diodes

We report the characterization of white light emitting devices fabricated using conjugated polymer blends. Blue–green poly(91FV-co-9PV) and orange–red emissive poly(2-(2′-ethylhexyloxy)-5-methoxy-1,4-phenylenevinylene) (MEH-PPV) were employed in the blends. The inefficient energy transfer between these two light emitting polymers enables the production of white light emission through control of the blend ratio. The PL and EL emission spectra of the blend systems were found to vary with the blend ratio. The EL devices were fabricated in the ITO/PEDOT/blend/LiF/Al configuration and white light emission was obtained for one of the tested blend ratios.