Spectral characteristic of perylene dye doped in copolymer of ST=MMA was studied. The changes in the optical absorption spectrum and optical parameters including the band tail width and band gap energies for the samples were investigated before and after irradiation by c-ray and also after a continuous exposure to filtered and UV radiation for 10 h. The study was extended to calculate the rate constants of photodegradation and the fluorescence quantum yield of the samples.
The spectroscopic properties of 1,4,170 and 750 oxazine dyes doped in polymethyl methacrylate (PMMA) were measured and studied. The photostability of these samples were outdoor tested during the four seasons. The optical efficiency of luminescent solar concentrator (LSC) of 750 oxazine dye was measured and calculated hourly for one year (1995)(1996) considering day 21 as a reference day for each month. The performance of LSC has been tested at three different positions using, X-Y tracker.
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