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

Abstract

Transparent oxyfluoride glass ceramics (GCs) containing LaOF:Er 3+ nanocrystals were synthesized. X-ray diffraction (XRD), Raman spectra and transmission electron microscope (TEM) confirmed the formation of LaOF nanocrystals in glass matrix. Energy dispersive spectrometer (EDS) results and Judd-Ofelt (J-O) intensity parameters demonstrated the incorporation of Er 3+ into LaOF nanocrystals. Enhanced 2.7 μm emission was achieved upon excitation with a 980 nm laser diode (LD). Upconversion, near-infrared emissions, and energy transfer mechanisms were studied to elucidate 2.7 μm emission behaviors. The enhanced 2.7 μm emission is most likely ascribed to the incorporation of Er 3+ ions into the low phonon energy LaOF nanocrystals. The excellent optical properties of this GC material indicate that it is a promising candidate for mid-infrared fiber lasers. , "Origin of near to middle infrared luminescence and energy transfer process of Er 3+ /Yb 3+ co-doped fluorotellurite glasses under different excitations," Sci. Rep. 5, 8233 (2015). 5. T.

Novel Er3+/Ho3+‐codoped glass‐ceramic fibers for broadband tunable mid‐infrared fiber lasers

“…Combining the advantages of the low phonon energy of fluoride nanocrystals and the outstanding chemical durability and thermal stability of the oxide glass matrix, oxyfluoride glass-ceramics (GCs) have been considered as potential candidates for rare-earth-doped fiber lasers. [12][13][14][15][16] However, regretfully, there is neither report on the fabrication of Er 3+ /Ho 3+ -codoped oxyfluoride GC fibers, nor the investigation of broadband tunable MIR spectroscopic properties of these fibers to our best knowledge. If so, the application of the fiber in MIR fiber lasers will be seriously limited.…”

Spectroscopic properties in Er3+-doped germanotellurite glasses and glass ceramics for mid-infrared laser materials

“…Among Er 3+ -doped materials, TeO 2 -based GCs have attracted great attention due to the following advantages. On one hand, GCs combine the advantages of excellent fiber-drawing ability of glass 7 8 and strong crystal field of nanocrystals 9 10 . On the other hand, tellurite glasses possess wide transmission region (from 0.35 to 5 μm), the lowest phonon energy (~750 cm −1 ) among the common oxide glasses, large refractive index (~2.0), high solubility for rare earth ions and good chemical durability etc 11 12 13 14 .…”

Effect of ZnO on the crystallization and photoluminescence of CsPbI3 perovskite quantum dots in borosilicate glasses

“…Raman spectra of the glass samples with different ZnO concentrations in the wavenumber range of 200–1000 cm −1 were shown in Figure 3B. The peak of 480 cm −1 is assigned to the [SiO 4 ] and [BO 4 ] units 28,31 . The peak near 770 cm −1 is assigned to the B‐O‐B stretching vibration of [BO 4 ] tetrahedral units and the B‐O‐B bending vibration in [BO 3 ] triangles units 28,32 .…”

“…The peak of 480 cm −1 is assigned to the [SiO 4 ] and [BO 4 ] units. 28,31 The peak near 770 cm −1 is assigned to the B-O-B stretching vibration of [BO 4 ] tetrahedral units and the B-O-B bending vibration in [BO 3 ] triangles units. 28,32 Consistent with the result of clearly decreases, which is beneficial for the movement of Cs + , Pb 2+ , and I − ions and the growth of CsPbI 3 QDs in the glass.…”