Synthesis and luminescence properties of Er3+ doped and Er3+–Yb3+ codoped phosphovanadate YP0.5V0.5O4 phosphors

A novel optical thermometry strategy based on emission of Tm3+/Yb3+ codoped Na3GdV2O8 phosphors

“…25 The 2 F 7/2 → 2 F 5/2 (Yb 3+ ) absorption transition produces a broad absorption band with a peak at 975 nm. 26 The absorption peaks located at 682 nm and 796 nm are assigned to the transitions of 3 H 6 to 3 F 2 and 3 H 4 of Tm 3+ ions, respectively. 27…”

Ba2YV3O11 Er3+/Yb3+ Nanostructures for Temperature Sensing in the Presence of Bismuth Ions

“…Furthermore, the thermal resolution is determined by the actual temperature defined by the sensor as well as the experimental detection setup, as shown below: , δ T = δFIR S r FIR where δFIR/FIR is estimated through the integrated area of the transitions. However, according to Brites et al, δFIR/FIR can be written as follows: δFIR FIR = 2 × δ I I where I is the integrated area of one of the peaks and δ I / I is estimated using the signal-to-noise ratio values .…”

Lanthanide-doped Na2MgScF7 exhibiting downshifting and upconversion emissions for multicolor anti-counterfeiting

“…Typically, three ion pairs, Yb 3+ -Er 3+ , Yb 3+ -Tm 3+ and Yb 3+ -Ho 3+ , have attracted great attention for their efficient UC emissions through the energy transfer upconversion (ETU) mechanism, in which the sensitizer (Yb 3+ ) absorbs lower energy photons and then donates energy to the activator (Er 3+ , Tm 3+ or Ho 3+ ) sequentially. [17][18][19][20] In addition, the Er 3+ ion can realize UC emission through the mechanism of excited state absorption (ESA), in which Er 3+ in the excited state absorbs another low-energy photon (such as 980 and 1530 nm) and then emits a highenergy photon. 21,22 The UC emissions from lanthanide ions exhibit great tunability in colors from the aspects of energy transfer and remote manipulation.…”