Insights into the crystal structure and photophysical response of Dy3+ doped Li3Y3Te2O12 for ratiometric temperature sensing

Augmenting cyan emission in vanadate garnets via Dy3+activation for light emitting devices and multi-mode optical thermometry

“…A decrease in the decay time from 0.41 to 0.26 ms with an increase in the concentration from 0.01 to 0.12 mol is observed. The dependence of decay time is related to the total relaxation rate as follows 15 where A nr is the non-radiative decay rate due to multi-phonon relaxation, τ 0 is the radiative decay time, and P t is the energy transfer rate among Dy 3+ ions. Hence due to the enhanced non-radiative transitions, decay time decreases at higher concentrations.…”

“…The excitation bands at around 453 nm are due to characteristic transition, 6 H 15/2 → 4 I 15/2 of Dy 3+ . 15 The emission spectra include characteristic emission bands of the self-activated complex and VO 4 3− and Dy 3+ activator. The broad emission is due to the convolution of 3 T 2 → 1 A 1 and 3 T 1 → 1 A 1 transitions of the VO 4 3− center.…”

“…A decrease in the decay time from 0.41 to 0.26 ms with an increase in the concentration from 0.01 to 0.12 mol is observed. The dependence of decay time is related to the total relaxation rate as follows 15 1…”

“…In addition, tuning of yellow and blue bands can be done easily in Dy 3+ -based garnet systems. 15 Moreover, reports on Dy 3+ -activated vanadate garnets are still limited. Among vanadate garnets, a report on the Dy 3+ /Sm 3+ co-doped Ca 2 NaMg 2 V 3 O 12 system for solid-state lighting is available.…”

Temperature sensing of Sr3Y2Ge3O12:Bi3+,Sm3+ garnet phosphors with tunable sensitivity

“…S6b†), which demonstrate good repeatability. In addition, the temperature resolution δT , the smallest possible temperature that can be measured, was calculated as follows: 42 where δI / I represents the ratio of fluctuation in noise to intensity maximum of PL and S r is the relative temperature sensitivity. The plot of δT vs .…”