Abstract
ZnSe microcrystals have been embedded into Pyrex glass matrix for the first time. The optical extinction and photoluminescence spectra of these ZnSe-doped (-embedded) glasses are measured at various temperatures. The specimens exhibit a clear shift of the optical extinction (absorption) edge due to the spatial confinement of carriers and excitons in three dimensions. Also, the photoluminescence spectra show a weak edge emission band at their absorption edges and an intense broad emission band at longer wavelength. The broad emission band shifts to the longer-wavelength side with increasing time elapsed after excitation. Taking into account some imperfections in the crystallite and impurities in the matrix glass, the results obtained are discussed and are compared with the properties of ZnSe bulk and film crystals.
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