NaCaTiTaO6:Sm3+: A novel orange-red-emitting tantalate phosphor with excellent thermal stability and high color purity for white LEDs

Charge transfer band excitation of La3NbO7:Sm3+ phosphors induced abnormal thermal quenching toward high‐sensitivity thermometers

“…charge transfer band, chromaticity coordinate, fluorescence intensity ratio, sensing sensitivity white LEDs, and so forth. 12 Therefore, it is reasonable to consider that the Sm 3+ activator has attracted extensive interest from researchers. 13,14 Particularly, the optical thermometers are meaningful and necessary for scientific research, medical treatment, and our daily life, because the conventional thermometers based on the bimetal and glass liquid could not fast detect the real temperature in inaccessible targets or intracellular cells, and they would also do great harm to the environment.…”

“…Recently, there is a lot of literature to discuss the photoluminescence (PL) properties of Sm 3+ ‐activated phosphors. For instance, Wei et al described that the SrY 2 O 4 :Bi 3+ /Sm 3+ phosphors with high thermal stability could be promised for ultraviolet (UV) lighting‐emitting diodes (LEDs) 9 ; Zhang et al suggested that the NaGd(MoO 4 ) 2 : Sm 3+ /Tb 3+ phosphors could be used in optical temperature sensors 10 ; Si et al determined that the LaNbO 4 :Sm 3+ /Er 3+ phosphors could be applied in the plasma display panels 11 ; Shu et al confirmed that the novel NaCaTiTaO 6 :Sm 3+ phosphors could be potential for white LEDs, and so forth 12 . Therefore, it is reasonable to consider that the Sm 3+ activator has attracted extensive interest from researchers 13,14 .…”

Stable Tunable Luminescence of Hetero-valent Eu Ion Activated Ba2InTaO6 Phosphors Synthesized by Defect-Induced Self-Reduction in the Molten-Salt Method

“…When the doping concentration rises to a certain value, the non-radiative energy transfer between the active ions leads to the concentration quenching effect, which leads to the decrease of the emission intensity. According to Blasse’s equation, ,, the type of nonradiative transition can be determined by the critical distance ( R C ) between adjacent active ions: R C ≈ 2­[3 V /(4π x c N )] 1/3 ( x c is the critical content of the active ions, and V and N are the volume and number of replaceable cations of the unit cell). In this work, x C , V , and N are 0.10, 560.4 Å 3 , and 4, respectively.…”

The composition engineering of red‐emitting Eu3+‐doped Ca10.5(PO4)7‐type solid solution phosphors and application in LED

“…The thermal stability of phosphor performs a fundamental task in practical applications. A significant quantity of investigations has exhibited that the nonradiative relaxation occurs with the elevation in temperature owing to the interactions of electron–phonon that prevent the emission transition among the ground and excited states, which results in thermal quenching 51,52 . When excitation occurs at 395 nm, the temperature‐dependent PL spectra of representative Eu 3+ ‐doped CNYP‐I (x = 1/3) phosphor are depicted in Figure 6.…”