NaLaMo2O8:Yb3+, Er3+ transparent glass ceramics: Up-conversion luminescence and temperature sensitivity property

A novel transparent Yb3+/Er3+ co-doped NaLaMo2O8 glass ceramics (GCs) with borosilicate glass as the matrix were prepared via glass melting and subsequent controlled crystallization method, and the light transmission property, phase structure, microstructure and up-conversion (UC) performance were characterized by XRD, TEM, transmittance spectroscopy and photoluminescence spectrum. A decrease in the lattice parameter of NaLaMo2O8 in GC sample was verified by XRD Rietveld method, indicating the successful incorporation of Yb3+/Er3+ ions in the Na/La-site of NaLaMo2O8 phase. The UC emission intensity of transparent GCs was significantly enhanced compared to precursor glass. The green light emission in the UC is a three-photon absorption process. The 2.0Yb3+/0.1Er3+(mol%) co-doped GC sample shows the maximum absolute sensitivity of 1.406% K−1 at 473 K, which implies that the as-prepared GC exhibits potential application prospects in the field of optical temperature sensing.