Photoacoustic and Photoluminescence Studies of CdS_xSe_<1-x> Doped Glasses

概要

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A series of CdS_xSe_<1-x> doped glasses with a mole fraction of sulfur in the range 0.68≦x≦0.91 is studied by photoacoustic (PA) and photoluminescence (PL) methods. Unlike the usual transmitted optical absorption measurement in which the samples have to be thin and have good quality surfaces, the photoacoustic spectroscopy (PAS) measurement yields relatively true optical spectra even if the glasses are quite thick. From the PA spectra, shifts in absorption bands due to the quantum confinement effect are observed in the glasses, having larger x values. The quantum confinement effect becomes larger in glasses with larger mole fractions of sulfur. The sizes of the microcrystals are expected to be smaller in the glasses having larger x values. This is also consistent with the PL experimental results.
社団法人応用物理学会の論文
1997-05-30