Optical studies of phthalocyanine molecules in PVA film

Optical absorption and emission spectral studies of various phthalocyanine (Pc) molecules in PVA matrix have been reported for the first time. The rec orded spectra are analyzed to get the important spectral parameters, such a s optical absorption cross-section (sigma(a)), emission cross-section (sigm a(e)), oscillator strength (f), fluorescence bandwidth (Delta lambda), emis sion wavelength (lambda), radiative decay time (tau) and optical gain (G). Analysis shows that the emission cross-section and optical gain are maximum in the NdHPc2-doped PVA matrix. However, a comparison of the calculated em ission parameters with that of berate glass matrix show that they are many times smaller in the present matrix. (C) 2000 Elsevier Science B.V. All rig hts reserved.