Effect of metal and semiconducting nanoparticles on the optical properties of Dy 3+ ions in lead borate glasses

Luminescence characteristics of Dy3+ doped sodium alumina borate glass: Role of silver

“…As shown in table 6, the glass matrix has large values for Ω 2 compared to Ω 4 and Ω 6 . 0.5 mol% Dy 3+ ion doped sodium alumina borate glass demonstrates higher Ω 2 value (9.46 × 10 −20 cm 2 ) compared to earlier reported glass compositions such as tellurite (5.61 × 10 −20 cm 2 ) [26], borotellurite (7.80 × 10 −20 cm 2 ) [8], lead borate (7.59 × 10 −20 cm 2 ) [19] and tellurite (2.283 × 10 −20 cm 2 ) [23] except for magnesium zinc sulfophosphate glass with a value of 11.92 × 10 −20 cm 2 [20]. The higher value of Ω 2 indicates that H-0.5Dy glass have higher covalency and asymmetry.…”

“…The small δ RMS values are indicative of the validity of fit [42]. Table 6 displays the calculated J-O intensity parameters for H-0.5Dy-yAg glasses along with the other Dy 3+ and Ag doped glass systems [8,19,20,23,26]. Among the J-O parameters Ω 2 characterizes the covalency and asymmetry of the bond between RE ions and oxygen ligands, while Ω 4 and Ω 6 provide information about bulk properties such as rigidity, basicity, and viscosity of glass host [50].…”

“…This broad band, related to the emission of isolated Ag + ions (4d 9 5s 1 →4d 10 ), was observed also in lithium tetraborate [55], oxyfluoride [56] and borophosphate [40] glasses. Emissions get more intense with Ag + content without any luminescence quenching, based on the enhancement of luminescence centers [19,23]. 3+ concentration.…”

“…Dy 3+ ions can be used for white light applications because of their intense emission in blue and yellow region [18]. There are very limited number of studies conducted on Dy 3+ -Ag and Dy 3+ -RE-Ag doped glasses such as borotellurite [8], lead borate [19], magnesium zinc sulfophosphate [20], phosphate [21], tellurite [22][23][24], zinc-magnesium tellurite [25], heavy metal germanium tellurite [26], soda-lime silicate [15], borate [27] and borosilicate [28] for photonic applications.…”

Lead Borate Glasses and Glass-Ceramics Singly Doped with Dy3+ for White LEDs

“…Simultaneously, boron oxide can be incorporated with either Bi 2 O 3 [19] or PbO [20], with the dominant percent forming chemically and thermally stable glasses. Great attention has been paid to lead borate glasses due to their distinct advantages, including good radiation shielding properties, strong absorption in the UV region, large transmission windows and the relatively large refractive indices compared to pure borate glasses or alkali borate glasses [21,22]. Recent studies indicate that the properties of systems based on PbO-B 2 O 3 containing rare earth ions are significant in the field of solid-state lasers, tri-color LEDs, reflecting windows and optoelectronic devices [23][24][25][26][27][28].…”