Abstract
White light emission was obtained from a light-emitting diodes(LEDs)prepared from an immiscible polymer blend consisting of Poly(9,9′-dihexylfluorene-2,7-divinylene-m-phenylenevinylene-stat-p-phenylenevinylene)(CPDHFPV)and poly(2-methoxy-5-(2′-ethy-hexyloxy)-1,4-phenylenevinylene)(MEH-PPV). An inefficient energy transfer between CPDHFPV and MEH-PPV was observed because the blends are partially miscible. The phase separated structure was good advantage to obtain white emitting device. The incomplete energy transfer in the blend generated a pure white color and the emission color of this system showed a low sensitivity to the driving voltage.
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