Development of Na2O-MO-Bi2O3-B2O3-Sm2O3 glasses (MO=Ba/Mg) for laser and scintillation application.

초록

Na2O-MO-Bi2O3-B2O3-Sm2O3 glasses (MO=Ba/Mg) were developed for the light emitting materials applications. Four broad emission peaks were observed at transitions 4G5/2 ? 6HJ (J=5/2, 7/2, 9/2 and 11/2). The maximum transition occur at 600 nm. Concentration quenching were observed at 0.5 mol% of Sm3+ ion for both glasses. The X-ray luminescence spectra were found similar to the photoluminescence spectra. The Judd Ofelt (JO) parameters for Sm3+ in the present glasses were procure from the absorption and emission spectra. The important parameters for the laser materials like quantum efficiency, stimulated emission cross section and radiative decay time were explained in detail in the present study. The lifetime were found decreasing with Sm3+-concentration which is the evident of energy transfer between Sm3+ ions. The energy transfer process were further explained by applying IH model. The orange emission from the present glasses were confirmed from CIE chromoticity diagram. According to the present results it is suggested that at 404 nm excitation and 600 nm emission the NMgBiBSm1.0 glass is suitable for the orange emitting devices and from X-ray luminescence emission spectra the present glass might be used for scintillation purpose.

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