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The purpose of this work was synthesis of a new copolymer consisting of poly(N-vinylcarbazole) and pyrazoloquinoline based dye, suitable to provide electroluminescence in the wavelength range corresponding to the blue. The obtained material was tested in a simple, single layer electroluminescent device. It were studied both its electronic and optical performances. It was found that the maximum of electroluminescence spectrum can be tuned within the wavelength of 450 nm and 490 nm (what reads in terms of colours as the blue and the cyan) by simple variation of the dye content.