Tunable luminescence in Pr³⁺ single-doped oxyfluoride glass ceramic and fibers

Abstract

Compared with conventional white light emitting diodes, white lasers are highly desired for application in visible light communication due to their higher modulation bandwidth and light output power. However, the...

Rapid synthesis of phosphor-glass composites in seconds based on particle self-stabilization

“…Glass generally exhibits stable physical/chemical properties and good transparency in the ultraviolet to near infrared region, which is used as excellent photo-functional composite matrix 28 – 30 . However, conventional synthesis and processing methods of PGC suffer from serious thermal erosion, low synthesis rate, and tedious process.…”

Main Group Elements Activated Near‐Infrared Photonic Materials

“…The second communication window is dominated by the region ≈1300 nm because the losses and dispersion around this band are relatively low. [45][46] The third window operates mainly in the region centered at 1550 nm and is widely applied for commercial long-distance communications due to the extremely low losses. [47][48] Currently, the available communication bands are mainly centered around the C-band due to the limited operating range of NIR photonic materials.…”

White light and near-infrared emissions of Pr3+ ions in SiO2-LaF3 sol–gel nano-glass-ceramics

“…Further, for KYF 4 :Pr 3+ -based glass-ceramics, it was proven that the modification in a local field around Pr 3+ from fully amorphous to crystalline (for the latter with parallel controll of the growth of fluoride crystals from 5 nm to 30 nm) resulted in emission color tuning from red via warm white, finally to cold white. 43 The tunability of Pr 3+ emission could also be triggered by modifications in their concentration, as presented by H. Lee et al , 2 who reported that LaF 3 :Pr 3+ -based OxGC materials could be used as color converters with a wide color gamut for blue LEDs emitting 450 nm wavelength, dependent on Pr 3+ concentration (from 1 mol% to 5 mol%). In addition, the elongation in the heat-treatment time (from 1 hour to 10 hours) and elevation of temperature (from 700 °C to 800 °C) also allowed for successfully shifting the chromaticity coordinates of emitted light color from blue regions to white light.…”

“…Most of the Pr 3+ -doped OxGC materials characterized and described in the current literature are focused on the preparation by high-temperature melt-quenching method, followed by the annealing of parent glasses at controlled and specified time and temperature conditions. Among them, OxGCs containing plentiful fluoride phases classified to AF x type (CaF 2 , 29 SrF 2 , 30,31 BaF 2 , 32,33 LaF 3 , 2,34–37 YF 3 , 38 or PbF 2 39 ) and AMF x type (NaYF 4 , 1 NaLaF 4 , 25 BaYF 5 , 40 LiGdF 4 /GdF 3 , 41 NaGdF 4 , 42 KYF 4 43 ) have been reported. Interestingly, the spectroscopic behavior of Pr 3+ ions could be successfully modulated by changing their local environment, i.e.…”