| Abstrakt: |
Ce3+/Dy3+ (CDBB) and Ce3+/Sm3+ (CSBB) co-doped barium borate glasses were prepared by melt quenching technique. These glasses are made of B2O3 as a glass former and contain the luminescence activators of Ce3+, Dy3+ and Sm3+ rare earth ions. FT–IR spectra figured out the presence of various stretching and bending vibrations of borate groups in the prepared glasses energy dispersive X-ray spectroscopy (EDX) combined with SEM, enabled the study of near-surface elements and their quantities at various locations, resulting in a sample map. Optical absorption, optical band gap energy (Eg), Urbach energy (ΔE) and the linear refractive index (n) were calculated from the wavelength range observed from 1200 to 200 nm using UV-Vis spectrometer. The emitting wavelengths including 435 (blue), 560 (green), 600 (reddish orange) and 645 nm (red) were observed simultaneously in the luminescent spectra of CSBB at the prominent excitation wavelength of 400 nm, and the mixture of these four emissions yields the white light emission. Further, the energy transfer process occured due to sensitizer-activator ion pairs via a non-radiative mechanism. Notably, co-doping Ce3+and Sm3+ ions increased red emission by efficiently transferring energy from Ce3+ to Sm3+ in the CSBB glass. The CIE chromatograph coordinate (x = 0.339, y = 0.331) of the emission from the CSBB glass is close to the standard white-light illumination (0.320, 0.348). The measured excitation purity (Pe) and colour purity (Pc) of these glasses revealed the quality of their light emission. Furthermore, the synthesized CDBB glasses have reasonable non-linear optical (NLO) properties with stronger SHG intensity of 11.0 mV. [ABSTRACT FROM AUTHOR] |
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