Upconverting luminescence based dual-modal temperature sensing for Yb3+/Er3+/Tm3+: YF3 nanocrystals embedded glass ceramic

Structural Studies of Rare Earth-Doped Fluoroborosilicate Glasses by Advanced Solid-State NMR

“…The borosilicate glass network is characterized by 29 Si and 11 B magic angle spinning (MAS) NMR spectra. The F − distribution is probed by 19 F MAS and 23 Na{ 19 between F − ions and cations are confirmed by 11 B{ 19 F} Jcoupling-based heteronuclear multiple quantum coherence (J-HMQC) and 19 F{ 23 Na} REDOR experiments. The resolution of 11 B signals is assisted by 11 B triple-quantum MAS (TQMAS) spectra.…”

“…Signal deconvolutions were done with the DMFIT software. 43 19 F/ 23 Na, 19 F/ 11 B, and 11 B/ 23 Na heteronuclear dipole− dipole recoupling experiments were conducted using a rotational echo double resonance (REDOR) method. 44−46 These experiments are composed of two parts: a rotorsynchronized spin echo signal of the observed nuclei is recorded in the first part, yielding an intensity S 0 .…”

“…50,51 The efficiency factor f was estimated from second-order quadrupolar effects (SOQEs) data and simulation of experimental conditions using the SIMPSON program. 52 For 11 B/ 23 Na REDOR, the M 2 values were obtained by a more practical approach, based on the approximate formula 53…”

“…Therefore, they are suitable hosts for luminescent REI and are considered to be promising optical materials with extensive applications. White light emission has been achieved in Ce 3+ /Dy 3+ , Eu 3+ /Tb 3+ /Dy 3+ , and Tm 3+ /Tb 3+ /Eu 3+ REI-codoped oxyfluoride glasses under near-ultraviolet light excitation, showing potential applications in red–green–blue (RGB) combination white light generation. − The temperature-dependent upconversion fluorescences have been observed in Er 3+ (Er 3+ /Yb 3+ )-doped oxyfluoride glasses, making such materials to be potential candidates for temperature sensing. , The integral scintillation efficiencies of Tb 3+ ions in oxyfluoride borogermanate and oxyfluoride silicate glasses were found to be about 26.9 and 68.0%, respectively, of the standard Bi 4 Ge 3 O 12 (BGO) scintillating crystal, showing prospective applications in high-resolution X-ray imaging. , Moreover, the REI-doped oxyfluoride glasses can be processed under appropriate heat treatment into glass ceramics containing various fluoride crystals, such as MF 2 (M = Pb, Cd, Ca, Ba), − NF 3 (N = La, Y), − and AREF n (A = K, Na, Ba; RE = Y, Yb, La, Lu, Gd). − These materials can be used in optical amplifiers, upconversion devices, solid-state lasers, optical thermometry, etc. ,− The local structures of glasses have a significant effect on the luminescence properties of REI. Although considerable luminescence performances have been reported for these materials, the fundamental local structure information is rarely reported.…”

Fluorophosphate Upconversion-Luminescent Glass-Ceramics Containing Ba2LaF7:Er3+ Nanocrystals: An Advanced Solid-State Nuclear Magnetic Resonance Study

“…Thereafter, there have been numerous studies on upconversion-luminescent oxyfluoride glass-ceramics. The fluoride crystals that are precipitated in such glasses are mainly ReF 3 , MF 2 , AReF 4 , MReF 5 , and M 2 ReF 7 (Re = rare-earth atom; M = Ca, Ba, Sr, and Pb; A = Li, Na, and K) types. − Most previous studies have been focused on the luminescent properties of upconversion materials. However, these properties highly depend on the local structures and distributions of rare-earth ions in glass-ceramics, the precipitated crystal phase, the size of the crystal, and other factors.…”