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23 July 1993Picosecond photoluminescence from poly(2-methoxy,5-(2'-ethyl-hexyloxy)-p-phenylene- vinylene): solutions, gels, films, and blends
We present the results of picosecond time-resolved luminescence studies of poly(2-methoxy,5- (2'-ethyl-hexyloxy)-p-phenylene-vinylene),MEH-PPV, in four forms: a pure film, in solution, in an ultra-high molecular weight polyethylene (UHMW-PE) gel, and a MEH-PPV/UHMW- PE blend. The luminescence has a characteristic lifetime of 200 - 300 ps at 293 K and 500 - 700 ps at 80 K. The decay times are approximately the same for the four forms of the material we studied. Calculated lifetimes longer than those measured and the observed temperature dependence imply that the luminescence is quenched by non-radiative processes. Fitting and luminescence versus pump intensity are used to determine possible mechanisms.
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Andy W. Hays, Laura B. Smilowitz, Alan J. Heeger, Gary Wang, John Edward Bowers, "Picosecond photoluminescence from poly(2-methoxy,5-(2'-ethyl-hexyloxy)-p-phenylene-vinylene): solutions, gels, films, and blends," Proc. SPIE 1852, Nonlinear Optical Properties of Advanced Materials, (23 July 1993);