Crystal structure, optical spectroscopy and energy transfer properties in NaZnPO₄:Ce³⁺, Tb³⁺ phosphors for UV-based LEDs

Abstract

A series of Ce3+, Tb3+ and, Ce3+/Tb3+ doped NaZnPO4(NZPO) phosphors synthesized via the high-temperature solid-state reaction method were investigated.

Highly sensitive optical temperature sensing based on pump-power-dependent upconversion luminescence in LiZnPO4:Yb3+–Er3+/Ho3+ phosphors

“…The spectrum displayed a weak absorption band in the range 520-630 cm À1 which arises due to the P-O vibration mode. [36][37][38] The dopant of RE ions had little impact on the main structure of the matrix, according to the non-doped/co-doped FTIR spectra of several doped ions, which was compatible with the XRD data.…”

Rapid annealing: minutes to enhance the green emission of the Tb3+-doped ZnGa2O4nanophosphor with restricted grain growth

“…50,52,53,57 The sharp and strong emission in the green region at 487, 545, 586 and 621 nm is due to the 5 D 4 → 7 J j ( j = 6, 5, 4, 3) transitions, respectively. 15,58 The green emission intensity increases with annealing temperature, whereas the emission in the blue is not significantly affected (inset Fig. 9b).…”

Synthesis and optical spectroscopy of Na3Y(VO4)2:Eu3+ phosphors for thermometry and display applications

“…The following equation explains the relationship between luminescent intensity and doping concentration. 5,36 where I represent the emission intensity, k and β are related to the coefficients, and Q represents the interaction type constant. In addition, equivalence to eqn (3) could also be expressed as:( I / X ) = −( θ /3) L ( X ) + A …”

“…Rare earth doped phosphors have been widely used in recent years in a variety of applications, ranging from light sources and displays to catalysts and biomarkers. 1–5 Contactless optical thermometry has recently received a lot of interest as a novel approach with great detection sensitivity, spatial resolution, and a short acquisition time. 6–10 Contactless optical thermometry has recently received a lot of interest as a novel approach with great detection sensitivity, spatial resolution, and a short acquisition time.…”