Morötesini görünüre çeviren erbiyum katkılanmış poliüretanların incelenmesi

UV-to-visible conversion characteristics of novel erbium-doped elastomeric poly(ether-urethaneurea) copolymers were investigated. Polymer samples containing ErCl3.6H2O at a concentration range of 5 to 25% by weight were synthesized. The absorption spectra of the samples showed bands due to the dopant erbium ions. When excited at 355 nm, the doped polymer samples produced emission covering the 400-750 nm visible region. Samples with different erbium concentrations were examined to compare the role of concentration in UV-VIS conversion. In particular, chromaticity coordinates, color rendering index (CRI), overlap factors with eye response, and color temperature were determined as a function of erbium ion concentration. Finally, conversion efficiencies of the erbium-doped polymers were investigated by accounting for Rayleigh scattering and Fresnel losses.