TiO_2 Nanoparticles mixed MEH-PPV Hybrid Absorbing Layer

摘要

Hybrid absorber layers having surfactant free CdTe nanoparticles dispersed in poly (2-methoxy, 5-(2-ethyl-hexyloxy)-p-phenyl vinylene) (MEH-PPV) were deposited using spin coating technique. HNMR spectra showed the chemical attachment of TiO_2 nanoparticles to alkoxy group of MEH-PPV. Photoluminescence (PL) measurement confirmed the PL quenching, which is a measure of the degree of dispersion of nanoparticles in the MEH-PPV matrix. This also confirmed that the required dissociation of excitons is taking place. The charge transfer between the polymer and nanoparticles was further confirmed with the help of cyclic voltammetry.