Influence of composition and structure on the thermal quenching of the 5d–4f emission of Eu²⁺ doped M–Si–N (M = alkali, alkaline earth, rare earth) nitridosilicates

Abstract

Thermal quenching of the Eu2+ emission in the nitridosilicates has been analysed and related to structure and composition.

Multisite Cation Regulation of Broadband Cyan-Emitting (Ba1–xSrx)9Lu2Si6O24/Eu2+ Phosphors for Full-Spectrum wLEDs

“…Thermal stability is one of the significant properties that affect the application of phosphors, which is greatly affected by the local structure. , To investigate the effects of temperature on the emissions due to the Eu 2+ activator ions at various Ba crystallographic sites, the comparison of the I 3/ I 1 and I 2/ I 1 measured at different temperatures is carried out, as shown in Table S2. As for the x = 0 sample, the I 3/ I 1 at 77 K is 9.62 times of that at 295 K, whereas the I 2/ I 1 at 77 K is 3.82 times of that at 295 K. It indicates that the emission of Eu 2+ at the Ba3 site is more sensitive with temperature, which has the worst thermal stability.…”

Narrow-band Rb1−yKyNa3(Li3SiO4)4:Eu2+(0 ≤ y ≤ 1) cyan-blue phosphors for full-spectrum white LEDs

“…7b, the peak intensity and integrated emission intensity at 150 °C are still 76.28% and 92%, respectively, of those at 25 °C, indicating good luminescence thermal stability. To explain the temperature-dependent thermal quenching phenomenon, the Arrhenius formula 32,33 was used to estimate the activation energy for thermal quenching:where I T and I 0 are the emission intensities without thermal quenching at temperature T and normal temperature, respectively; C is a dimensionless dependence constant; K is the Boltzmann constant; T is the absolute temperature; and Δ E is the activation energy for thermal quenching. The formula is transformed into a linear equation as follows:…”

One- and Two-Photon Excited Photoluminescence and Suppression of Thermal Quenching of CsSnBr3 Microsquare and Micropyramid

“…As shown in Figure g, the integrated PL intensity of both samples dropped down upon temperature increase because of the thermal quenching. We can describe the temperature dependence of integrated PL intensity by the Arrhenius equation: ,, where I ( T ) and I 0 are the integrated PL intensity at absolute temperature T and at 0 K, respectively. A is a ratio of nonradiative and radiative probabilities, and E a is the activation energy of thermally assisted nonradiative recombination.…”

“…As shown in Figure 4g, the integrated PL intensity of both samples dropped down upon temperature increase because of the thermal quenching. We can describe the temperature dependence of integrated PL intensity by the Arrhenius equation: 4,49,50…”