Photoluminescence and white light generation of Dy2O3 doped Li2O-BaO-Gd2O3- SiO2 for white light LED

Investigation of Dy3+ Ion Doped Borate Glasses and Their Potential for WLED and Laser Application

“…This is a non-radiative transition, where phonons are generated as released energy. Afterwards, the electrons from the metastable 4 F9/2 level go down to the 6 H15/2 (483) nm, 6 H13/2 (575) nm, 6 H11/2 (665) nm and 6 H9/2 (753) nm level, comparable with [9,12].…”

“…The physical properties were obtained by weighing the glass samples following Archimedes' law [12]. Radiative properties, including JO parameter (Ωλ); experiment (fexp) and calculated oscillator strength (fcal); stimulated emission cross-section (σe); radiative transition probability (AR); experiment (βexp) and calculated branching ratio (βcal); and radiative lifetime (τrad), were analyzed using FORTRAN, where Judd Ofelt theory [15,16] was implemented in the program.…”

“…Radiative properties, including JO parameter (Ωλ); experiment (fexp) and calculated oscillator strength (fcal); stimulated emission cross-section (σe); radiative transition probability (AR); experiment (βexp) and calculated branching ratio (βcal); and radiative lifetime (τrad), were analyzed using FORTRAN, where Judd Ofelt theory [15,16] was implemented in the program. The program has been used in previous works such as [11][12][13]. Figure 1 shows the density and molar volume of the glasses.…”

“…Meanwhile, 'n' shows the typical optical transition and Tauc's plot obliges n = ½ for direct and n = 2 for indirect transition [12]. For the oxide glass system, Eq.…”

“…The addition of Dy 3+ in glasses such as tellurium-borate glass [9], tellurite glasses [10], borotellurite glasses [11], silicate glass [12], fluorosilicate glass [13] and borosilicate glasses [14] has been investigated. It was shown that Dy 3+ ion-doped glasses generated a strong white emission, which makes them suitable for solidstate lighting (SSL) or white illumination applications.…”