Fabrication and upconversion luminescence properties of Er:SrF2 transparent ceramics compared with Er:CaF2

Synthesis of SrF2:Yb:Er ceramic precursor powder by co-precipitation from aqueous solution with different fluorinating media: NaF, KF and NH4F

“…The development of a technology for producing optical fluoride ceramics from powder is a key achievement in optical materials science. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] One of the major challenges in obtaining optical ceramics is the quality of the starting powder for pressing. The concept of powder quality involves a large list of parameters: particle size distribution, particle morphology, specific surface area, acid-base properties of the surface, and adsorption of trace impurities on the surface of particles.…”

Upconverting SrF2:Er3+ Nanoparticles for Optical Temperature Sensors

“…Thus far, several reports showing the UC luminescence of SrF 2 -containing Er 3+ ions have been published; however, they are focused on the materials codoped with Yb 3+ ions in bulk − and nano , scale, excited at around 975 nm. The UC properties of the systems doped only with Er 3+ ions were investigated only for oxyfluoride glasses, ceramics, or glass–ceramics containing SrF 2 :Er 3+ NPs excited by the 980 nm wavelength, − or bulk materials excitable via 975 , and 1530 − nm wavelengths.…”

Regulation of the upconversion effect to promote the removal of biofilms on a titanium surface via photoelectrons

“…6c). 38 Increasing the concentration of Yb 3+ to 40% in Au 1 –RE 1 (Yb 40 –Er 2 )/TiO 2 does not result in higher ROS generating ability (17%) compared to Au 1 –RE 1 (Yb 20 –Er 2 )/TiO 2 . This is possibly attributed to the high concentration of Yb 3+ leading to energy dissipation during long-distance transfer, and quenching by non-radiative relaxation in the lattice or surface defects.…”