Regioregular poly[3-butyl-2,5-thienylene-alt-1,4-phenylene]: synthesis, preliminary characterization aspects and application in the fabrication of light-emitting diodes

A novel regioregular polymer comprising alternating 1,4-phenylene and 3-butyl-2,5-thienylene repeat units has been synthesized and characterized using 1 H NMR, FTIR, UV-VIS absorption and fluorescence emission spectroscopy. The derived polymer showed strong fluorescence with a solution quantum yield of 48% relative to quinine sulfate and a film phase photoluminescence yield of 17%. Green light-emitting diodes were fabricated using the polymer as the emitter layer.

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