Down-shifting photoluminescence studies of thermally stable Dy3+ ions doped borosilicate glasses for optoelectronic device applications

In this research work, Dy3+ doped alkali zinc alumino borosilicate (AZABS) glasses have been prepared via melt quenching technique. A series of AZABS glasses of varying concentrations of dysprosium (Dy3+) (0.1-2.5 mol%) was prepared. It was found that under UV excitation, 0.5 mol% Dy3+ doped glass exhibited maximum luminescence intensity. Subsequent photoluminescence studies like emission/excitation spectra, temperature-dependent photoluminescence and decay kinetics were also performed. The value of direct bandgap as calculated from Tauc Plot for 0.5 mol% of Dy3+ ions doped AZABS glass is 2.85 eV. Yellow to blue ratio and colorimetry analysis have showed that the as-prepared glasses are capable of producing cool white light. Application of Dexter theory showed that the energy transfer mechanism between the dopant ions in the glass matrix was of dipole-dipole nature. It is proposed that these Dy3+ doped AZABS glasses can be used as prospective materials in optoelectronic device applications such as solid-state lighting and w-LEDs.

Automated summary

In this research, Dy3+ doped AZABS glasses were prepared and their photoluminescent properties and energy transfer mechanism were investigated. It was found that the glass doped with 0.5 mol% Dy3+ exhibited the highest luminescence intensity and could produce cool white light. These Dy3+ doped glasses are proposed to be potential materials for optoelectronic devices such as solid-state lighting and w-LEDs.