Investigations on electron beam irradiated rare-earth doped SrF₂ for application as low fading dosimeter material: evidence for and DFT simulation of a radiation-induced phase

Abstract

A recent approach to measure electron radiation doses in the kGy range is the use of phosphors with an irradiation dose-dependent luminescence decay time. However, the applicability of the previously...

Effect of the fluorinating agent type (NH4F, NaF, KF) on the particle size and emission properties of SrF2:Yb:Er luminophores

“…1 The maximum theoretical quantum yields for upconversion luminescence are 50%, 33.33% and 25% for two-, three-and four-photon processes, respectively. [2][3][4] In order to be used in nanothermometry, 5,6 up-conversion lasers, 7 dosimeters, 8 bioimaging, [9][10][11][12][13] solar panel efficiency enhancement, [14][15][16][17][18][19][20] anticounterfeiting, [21][22][23] vacuum measurement, 24 and laser cooling, 25 powders with particle sizes in the range of tens of nanometres to tens of microns are required, including those with a core-shell structure. The powders generally have a lower up-conversion PLQY due to the increase in surface area, which is the source of luminescence quenching.…”

Synthesis of strontium fluoride nanoparticles in a microreactor with intensely swirling flows

“…Single crystals and ceramics of strontium fluoride doped with the rare earth ions are used as laser elements [4][5][6][7][8][9], effective phosphors [10] and fluoride solid electrolytes [11]. At the same time, activated strontium fluoride powders are precursors of optical ceramics [12][13][14][15][16][17][18][19], single crystals [20,21] and films, and are also of independent interest as phosphors [22][23][24][25][26][27][28][29][30][31], including as part of composites [32].…”