Abstract
Polypyrrole-PMMA (PPy-PMMA) blends have been prepared by chemical oxidative polymerization method. The band gap of all the blends lies in semiconductive range though PMMA is insulating in nature. Spherical agglomerated structure of the blends is observed from microstructural images. High photoluminescence (PL) intensity is obtained in PPy-PMMA blends even if PPy has low PL emission efficiency. The enhancement of PL emission intensity of the blends is due to Forster resonance energy transfer. Here an energy transfer occurs from donor PMMA to acceptor PPy which enhances the emission intensity of PPy. PL spectra show the increase in emission intensity with increase in concentration of PMMA in the blend up to a certain limit. Donor-donor interaction is also observed in the blend due to which the emission intensity of the blend having excess amount of PMMA suddenly falls down. Thus by tuning the amount of PMMA added in PPy matrix the PL intensity of the blend can be tuned and the blend can be used as a promising material for optoelectronic devices.
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