Luminescence of Tb3+ doped TeO2–ZnO–Na2O–PbO glasses containing silver nanoparticles

Abstract

Luminescence properties of Tb 3+ doped TeO 2 -ZnO-Na 2 O -PbO glasses containing silver nanoparticles ͑NPs͒ were investigated. The absorption band due to the surface plasmon resonance in the NPs was observed. Its amplitude increases with the heat treatment of the samples that controls the nucleation of the NPs. Tb 3+ emission bands centered at Ϸ485, Ϸ550, Ϸ585, and Ϸ623 nm were detected for excitation at 377 nm. The whole spectrum is intensified by the appropriate annealing time of the samples. Enhancement by Ϸ200% of the Tb 3+ luminescence at 550 nm was observed for samples annealed at 270°C during 62 h. This enhancement effect is due to the local field amplitude that increases with the amount of silver NPs and their aggregates.

Enhanced luminescence of Tb3+/Eu3+ doped tellurium oxide glass containing silver nanostructures

“…Moreover, previous studies with tellurium oxide glasses indicated that the symmetry around the RE ions does not change with the heat treatment. 17,18 Therefore the results indicate that the simultaneous presence of Tb 3+ and Eu 3+ ions is essential to observe the strong luminescence in the orange-red region.…”

“…[1][2][3]7,8,13 Recently nucleation of metallic nanoparticles ͑NPs͒ inside tellurium oxide glasses was reported. [14][15][16][17][18] In all cases studied the presence of NPs contributes to enhance the material's luminescence efficiency either due to ET from the NPs to the RE ions or by influence of the large local field on the RE ions positioned in the vicinity of the NPs. Indeed the presence of silver nanostructures in TeO 2 -PbO-GeO 2 In this work we present the first luminescence study of Tb 3+ / Eu 3+ doped TeO 2 -ZnO-Na 2 O -PbO glass containing silver NPs.…”

Synthesis, microstructure, and photoluminescence properties of thornlike SiC:Tb nanostructures

“…The peaks at 488, 545, 585, and 620 nm can be assigned to the intra-4f 5 D 4 ! 7 F j transitions ( j ¼ 6, 5, 4, 3) of Tb 3þ ions, [17][18][19][20] respectively. The strongest peak at 545 nm, splitting into two lines (543 nm and 547 nm), is assigned to the 5 D 4 !…”

“…[2][3][4][5][6][7][8][9][10] Terbium (Tb) has frequently been used as dopant, because of its strong radiative intra-4f transitions in the green light region, which is very important to optoelectronic devices such as light-emitting diodes. [12][13][14][15][16][17][18][19][20] The photoluminescence (PL) properties of Tb-doped SiC(SiC:Tb) materials have been researched by several groups. [12][13][14][15] Sendova-Vassileva et al 12,13 reported the room-temperature (RT) PL of Tb 3þ ions doped in amorphous SiC:H (a-SiC:H) thin films prepared by magnetron cosputtering.…”

Excitability of high-energy ultraviolet radiation for Dy3+ in antimony phosphate glasses

“…Among RE 3+ ions, dysprosium ion (Dy 3+ ) in oxide glasses has narrow intense emissions at blue ( 4 F 9/2 → 6 H 13/2 ) and yellow ( 4 F 9/2 → 6 H 15/2 ) regions, and exhibits warm yellowish-white light to * E-mail: lhai8686@yahoo.com naked eyes [39][40][41][42][43][44]. However, the effective excitation region of Dy 3+ is restricted to the long-wave ultraviolet (UVA) area, showing the insufficiency in medium-wave ultraviolet (UVB) and short-wave ultraviolet (UVC) regions [45,46].…”