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Photoluminescence Phenomena of Functional Dopant Doped Soluble Polypyrroles in Organic Solvents

We have investigated the photoluminescence (PL) phenomena of functional dopant doped polypyrroles (Ppy-DEHS, Ppy-BNS) in organic solvents with various conditions. From the results of UV-Vis. and PL spectra, we found that the change in polymer chain conformation from expanded to coil-like structure resulted in blue-shifted emission and reduced PL intensity. Addition of small amount of non-polar solvent to polar solvent media did not influence the shapes of PL curves but reduced the PL intensity under photo-excitation at 380 nm.