An Eu/Tb-codoped inorganic apatite Ca5(PO4)3F luminescent thermometer

Near infrared absorbing near infrared emitting highly-sensitive luminescent nanothermometer based on Nd3+ to Yb3+ energy transfer

“…From eqn (10) it is clear that at higher Yb 3+ doping levels, which make the energy diffusion through the Yb 3+ network more effective, the impact of back energy transfer is diminished and leads to changes in the LIR, as presented in Fig. 3a.…”

“…A good example of a temperature dependent interionic sensor is a Eu 3+ ,Tb 3+ codoped system, where the relative emission intensity of the 5 D 4 -7 F 5 (Tb 3+ ) band to the 5 D 0 -7 F 2 (Eu 3+ ) band has been used for temperature sensing. [10][11][12] With an increase in the temperature, the population of 5 D 4 decreases via multiphonon depopulation, enhancing the population of the 5 D 0 state of the Eu 3+ ions. According to Brites, 7 the sensitivity of the temperature measurement in luminescent thermometers is proportional to the energy difference between two energy states, whose population can be affected by the temperature.…”

Calcium orthophosphates (CaPO 4 ): Occurrence and properties

“…The effect of fluoride contents in FHA on both osteoblast behavior (Qu and Wei 2006;Bhadang et al 2010) and leukemia cells proliferation (Theiszova et al 2008) has been described. Non-biomedical applications of FA include luminescent light tubes (Davis et al 1971) and thermometers (Fu et al 2015), laser materials (Mazelsky et al 1968b;Ohlmann et al 1968) (in all these cases various dopants are necessary), as well as catalysts ).…”

Tb3+/Eu3+: YF3 nanophase embedded glass ceramics: Structural characterization, tunable luminescence and temperature sensing behavior

“…The selection of Tb 3+ and Eu 3+ as activators has recently received considerable interests for possible applications in white light emitting diodes (WLEDs) and temperature sensors, owing to their tunable luminescence with the help of energy transfer from Tb 3+ to Eu 3+ [26][27][28][29][30]. As for as we known, it is the first time to investigate the optical spectroscopy of Tb 3+ /Eu 3+ in YF 3 embedded GCs.…”