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We present a fundamental experimental study based on the fluorescence investigation of thin σ-conjugated polymer films, where the dependence of optoelectrical properties and UV degradation on film thickness ranging from nano- to microscale was studied. Such extensive and detailed study was performed for the first time and observed spectral shifts in emission and excitation spectra and UV degradation...
The microstructure of thin poly-[2-methoxy-5-(2′-ethyl-hexyloxy)-p-phenylene vinylene] (MEH-PPV) films was investigated by photoluminescence measurements and X-Ray diffraction analysis over thickness from several tens up to several hundreds of nanometer. Obtained results were correlated with exciton diffusion length obtained by the photovoltage method. All measurements revealed that there is a threshold...
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