Superiority of shortwave transparent glasses with moderate phonon energy in achieving effective radiations from 1D2 level of Pr3+

Fabrication and characterization of luminescent Pr3+ doped fluorapatite nanocrystals as bioimaging contrast agents

“…In this work, we report the synthesis of novel luminescent Pr 3+ -doped FAP nanoparticles, produced in solution followed by thermal activation, establishing a low temperature chemical production method. Usually, high temperature methods (above 980 o C) are used for fabrication of Pr-doped FAP [18,19], but in this work we have shown that it is possible to use room temperature precipitation followed by short activation at 700 o C in order to obtain such material with prolonged time of reaction. Using this procedure, we have synthesized biocompatible and luminescent nanocrystals for bioimaging.…”

“…Phosphor materials based on FAP are usually synthesized by high-temperature solidstate reaction technique for laser and luminescent tube applications [17][18][19]. High performances of nanomaterials for biomedical applications requires some unique structural characteristics, such as nanometer crystallite size, uniform morphology, good dispersion, and specific surface area [20].…”

Spectroscopic and Thermographic Qualities of Praseodymium-Doped Oxyfluorotellurite Glasses

“…Metastable states 1 D 2 and 3 P 0 , when stimulated, can emit red, green and blue light simultaneously for laser operation in both crystals [10,[23][24][25] and glass hosts [2,[26][27][28]. And due to the 1 D 2 → 1 G 4 transition, Pr 3+ -doped glasses can also exhibit another interesting near-infrared (NIR) emission [29]. Although many spectroscopic studies for various matrices/hosts (crystals, glasses, glass ceramics) activated with Pr 3+ ions have already been published, and optical enhancement based on 1 G 4 → 3 H 5 and 3 F 3,4 → 3 H 4 transitions in the NIR has been demonstrated, a description of the optical properties of Pr 3+ single-doped fluorotellurite glass is still relatively rare.…”