Effect of disperse red dye on spectral red-shift of green-emitting luminous fibre

Abstract

Green-emitting rare earth luminous fibre has been dyed with disperse red fluorescent dyestuff and ordinary disperse red dyestuff respectively, and the effects of disperse red dyestuffs on the spectral red-shift of green-emitting rare earth luminous fibre are studied by testing the luminescent properties. The emission spectra of green-emitting luminous fibre dyed with Red 3B, Red SE-GFL and Red S-2GFL show that the emission peak of fibre moves towards 620 nm from 520 nm after being dyed with Red 3B, and the spectrum has the strongest emission intensity when the concentration of Red 3B dye is 1.0% (o.w.f). The result of colorimetric analysis shows that the luminous fibre dyed with Red 3B dye at different concentrations has similar color purities, and the emission color of fibre is found closest to red color for the dyestuffs concentration of 1.0% (o.w.f). The analysis of energy transfer model of the dyed luminous fibre indicates that the light emitted by the SrAl₂O₄:Eu²⁺, Dy³⁺ phosphor could be used as a light source to excite the Red 3B dye, and the color of dyed luminous fibre is due to the blended luminescence color of the SrAl₂O₄: Eu²⁺, Dy³⁺ phosphor and Red 3B dye.