Temperature dependence of the luminescence decay in the fluorescent dyes

Abstract

            The main aim of this study is to use laser induced fluorescence (LIF) technique to study and compare the temperature dependence of the luminescence decay curves of the fluorescent dyes (the green dye, the orange dye, and the red dye). The 470 nm blue laser was used as an excitation light source to induce fluorescence. The LIF spectra were detected by a compact fiber coupled BTC-110S CCD spectrometer. All the controls and data acquisition were performed under a computer interfacing software. It was found that temperature affected the fluorescence spectra of fluorescence dyes in terms of both peak intensity and peak position at maximum intensity. The fluorescent intensity decreased at higher temperature for all the samples under the range of 25–55oC and the orange dye was found to be the most temperature sensitive in this temperature range