Ag2O dependent up-conversion luminescence properties in Tm3+/Er3+/Yb3+ co-doped oxyfluorogermanate glasses

Abstract

Articles you may be interested inSilver nanoparticles enhanced luminescence properties of Er3+ doped tellurite glasses: Effect of heat treatment J. Appl. Phys. 116, 123504 (2014); 10.1063/1.4896363 2.05 µm emission properties and energy transfer mechanism of germanate glass doped with Ho3+, Tm3+, and Er3+Up-conversion (UC) luminescence properties of Ag/Tm 3þ /Er 3þ /Yb 3þ co-doped oxyfluorogermanate glasses have been studied to assess the effective role of silver nanoparticles as a sensitizer for Tm 3þ and Er 3þ ions. The X-ray diffraction patterns obtained in this work do not reveal any crystalline phase in the glass. However, the absorption spectra reveal that surface plasmons resonance band of Ag undergoes a distinct split with two maxima and a very broad absorption peak with a background that extends toward the near infrared (NIR) with the increasing of Ag 2 O added concentration. Transmission electron microscope images confirm that silver nanoparticles have been precipitated from matrix glasses and show their distribution, size, and shapes. In addition, changes in UC luminescence intensity of four emission bands 476, 524, 546, and 658 nm corresponding to 1 G 4 ! 3 H 6 (Tm 3þ ), ( 2 H 11/2 , 4 S 3/2 ) ! 4 I 15/2 (Er 3þ ), and 4 F 9/2 ! 4 I 15/2 (Er 3þ ) transitions, respectively, as a function of silver addition to the base composition have been measured under 980 nm excitation. It is confirmed that Ag 2 O added concentration plays an important role in increasing the UC luminescence intensity; however, further increase in Ag 2 O added concentration reduces the intensity. V C 2014 AIP Publishing LLC. [http://dx.

Evolution in the Oxidation Valences and Sensitization Effect of Copper Through Modifying Glass Structure and Sn2+/Si Codoping

“…first reported that the significant enhancement of Eu 3+ emissions in fluoroborate glasses was attributed to the local field effect (LFE) induced by the surface plasmon resonance (SPR) of noble silver nanoparticles (Ag NPs) . Many subsequent investigations further demonstrate the enhancement effect of Ag NPs on REI luminescence . However, some reported the emission enhancements of REI were achieved by a typical energy transfer (ET) from very small molecule‐like, nonplamonic silver particles or isolated Ag + cations .…”

“…11 Many subsequent investigations further demonstrate the enhancement effect of Ag NPs on REI luminescence. 9,10,12 However, some reported the emission enhancements of REI were achieved by a typical energy transfer (ET) from very small molecule-like, nonplamonic silver particles or isolated Ag + cations. 8,10,13 At present, the primary investigations into the enhancement mechanism between noble metal species and the REI are focused on Agand Au-doped systems.…”

Enhanced emission and spectroscopic properties in oxyfluoride glass ceramics containing LaOF:Er^3+ nanocrystals

“…Among these materials mentioned above, GCs are one of the most important optical materials which combine the advantages of both glass (excellent fiber-drawing ability) and nanocrystals (strong crystal field). Simultaneously, oxyfluoride nanocrystal is considered as an ideal host due to its combination of the low phonon energy of fluoride and excellent mechanical and chemical stability of oxide [14,15]. However, to our best knowledge, there are no any reports about the mid-infrared emission of Er 3+ -doped GCs containing oxyfluoride nanocrystals.…”

Tunable and white light generation in lanthanide doped novel fluorophosphate glasses

“…Physical and optical properties of glasses depend on the elements of choice in their glass composition which may have one or two glass-formers to combine various properties, such as borosilicate and borofluorite, fluorophosphate, etc. Recently, oxyfluoride (fluorophosphate) glasses have attracted a large attention for optical properties because they provide comparatively low phonon energies and high chemical and mechanical stabilities [13].…”