3H4 Transition Research Articles

(Digital Presentation) La2Zr2O7:Pr3+ Nanoparticles for Luminescence Thermometry Based on a Single Parameter

Luminescence thermometry based on the variation of the fluorescence intensity ratio (FIR) of rare-earth materials has become fascinating owing to their applicability in chemically and electromagnetically harsh environments. Relevant to their practical applicability, a wide temperature sensing range is urgently required for luminescent thermometric materials besides possessing a high relative sensitivity. Herein, we have demonstrated that pyrochlore La2Zr2O7:Pr3+ (LZOP) nanoparticles (NPs) can serve as a promising optical temperature sensing material over a wide temperature range of 620 K. Specifically, we have taken advantage of the intervalence charge transfer state (IVCT) of Pr3+ doping ion for luminescence temperature sensing and confirmed excellent optical thermometric performance from the LZOP NPs in a temperature sensing range of 85-705 K. The thermal sensing here could be measured by exploiting one thermometric parameter, i.e. the FIR between 1D2 → 3H4 and 3P0 → 3H4 transitions of Pr3+, and thus we only need to use one calibration formula for the whole temperature range. A maximum relative sensitivity of > 0.4%·K−1 from 165 to 205 K and a low temperature uncertainty of 1.21 K at 185 K is obtained. Based on the proposed configurational coordinate diagrams, a high-lying IVCT state was demonstrated to be the cause for slow thermal quenching at high temperatures, which broadened the working range of our thermometric sensing materials. This work provides a useful inspiration for exploring appropriate host materials with slow thermal-quenching channels to develop optical thermometric materials over a wide temperature sensing range. Figure 1

Novel optical temperature sensors based on the emission of the Pr3+ ions doped Ca3(M,Ga)5O12 (M5+ = Nb, Ta) garnet phosphors

Pr3+-doped Ca3(Nb,Ga)5O12 (Pr:CNGG) and Ca3(Ta,Ga)5O12 (Pr:CTGG) phosphors with garnet structure have been systematically investigated as optical thermometric materials for potential applications in the field of sensing technology, for the first time to our knowledge. The ceramic samples of Pr:CNGG and Pr:CTGG with different concentrations of Pr3+ ions have been obtained by the solid-state reaction method. A comparative analysis to evidence the influence of the position of the inter-valence charge transfer (IVCT) states on the excited-state dynamics of Pr3+ ions in CNGG and CTGG materials is presented. The optical thermometric properties of the Pr:CNGG and Pr:CTGG samples were studied. The luminescence thermal quenching mechanisms of the 3P0 and 1D2 levels were investigated in detail based on the luminescence intensity ratio (LIR) of 1D2→3H4 / 3P0→3H4 (I606/I487) transitions over an extended temperature range (10–700 K). The maximum relative sensitivities were determined to be 1.64% K−1 at 10 K for 7 at% Pr:CTGG and 2.4% K−1 at 430 K for 1 at% Pr:CNGG, thus proving their potential as high-sensitivity temperature sensors in cryogenic and high-temperature domains, respectively.

Optical analysis of Sr3 Gd(PO4 )3 :Pr3+ phosphors for lighting applications.

A series of praseodymium (Pr3+ ) ion activated Sr3 Gd(1-x) (PO4 )3 :xPr3+ (0 ≤ x ≤ 2.0mol%) phosphors were prepared and their structural, compositional and luminescence properties were investigated. The X-ray diffraction profiles indicate that the studied phosphors crystallized into body centred cubic structure and the Pr3+ ions have no influence on Sr3 Gd(PO4 )3 phase. The high-resolution scanning electron microscopy images show the agglomeration of particles that are inter-connected and form irregular shape Sr3 Gd(PO4 )3 structures. The excitation transitions corresponding to Pr3+ :3 H4 → 3 P2,1,0 transitions at 445, 471 and 483 nm, respectively, matched well with the emission of blue-light-emitting diode (LED) chip. The emission spectra show strong reddish-orange luminescence through 1 D2 → 3 H4 transition when excited at 445 nm blue wavelength. The synthesized phosphors have the potential to be used as reddish-orange lighting devices.

Agricultural waste for the development of low cost Ca2SiO4:Pr3+ phosphors

Rice husk (RH) and egg shells (ES) are agricultural waste products which are converted into SiO2 (RH ash (RHA)) and CaO (ES ash (ESA)) powders, respectively, through firing and annealing at optimised temperature and time duration. By using these derived SiO2 and CaO raw chemicals, obtained from renewable sources, prepared Ca2SiO4 phosphors doped with Pr3+ ions through solid state reaction method. XRD reveals that the RHA contains SiO2 crystal nature with standard data and tridymite phase. ESA patterns confirm the purity of CaO with cubic phase. Ca2SiO4:Pr3+ (0.05 mol%) phosphor was confirmed with structure of ICDD card No. 01-083-0464 with particles are of irregular sizes and shapes. Excitation spectra of Ca2SiO4:Pr3+ phosphors exhibit highest intensity at 447 nm due to 3H4→3P2 transition. Emission spectra of Pr3+-doped phosphors reveal more intense band at 606 nm which is attributed to 1D2→3H4 transition with reddish-orange emission. CIE co-ordinates of the present phosphors are shifted from reddish-orange to yellow region with increase in Pr3+ ion concentration. Decay curves of the synthesized phosphors exhibit nearly mono-exponential nature for 0.01 mol% concentration and then changes to the bi-exponential nature for ≥0.05 mol% concentrations of Pr3+ ions owing to energy transfer via cross-relaxation channels confirming dipole-dipole interaction type. All the observed results recommend that the synthesized phosphors can be suitable for solid state lighting applications.

Spectral analysis of 1G4 level in the Pr3+:YLF crystal

The spectral measurement and energy level analysis of 1G4 are performed. Based on the absorption characteristics of the 1G4 level with different concentrations of Pr3+:YLF，the modified J-O theory was introduced to calculate the main spectral parameters. The emission cross-section spectra with two polarizations of the 1G4→3H5 transition excited by 1028 nm pumping and the fluorescence lifetime at the target wavelength (1322 nm) were measured. At the doping concentration of 1.0 at.%, the calculated peak emission cross section is close to the order of ∼1 × 10−20 cm2. Furthermore, we also discuss the energy level scheme of 1G4 in detail and proposed a cascade mechanism，which allows to further improve the output performance of the 915 nm (3P0→1G4) laser. For the first time, we propose a new approach to generate the fluorescence of 1322 nm by using 1G4 as an upper level.

Intense mechanoluminescence, thermoluminescence and photoluminescence in Pr3+ doped K0.02Na0.98NbO3 ferroelectric phosphor

Defect control is an important factor in the design of elastic-mechano-luminescence (EML) materials. In this work, the volatile ferroelectric K0.02Na0.98NbO3 phosphor was choose as a host, and with rare earth ion Pr3+. The material exhibited intense red photoluminescence (PL),long-persistent luminescence (LPL) and mechanoluminescence (ML) with the intensity peaked at 610 nm, which is ascribed to 1D2→3H4 transitions of Pr3+. The intense and recoverable red emission was observed under compression stress stimulation, indicating that EML was produced during the deformation process. By adjusting the concentration of Pr3+, a ferroelectric material that exhibited a high ML intensity, which much higher than the NaNbO3 system material was obtained. The thermoluminescence (TL) curve was used to explore the defect level of K0.02Na0.98NbO3: xPr3+ phosphors. Finally, a mechanistic model was proposed to illustrate the probable process of PL, TL and ML. Present study provided necessary information and knowledge for the further development of ML material system based on perovskite structure KXNa1-XNbO3.

Low-temperature green synthesis of nanocrystalline La2O2S:Pr3+ powders and investigation of photoluminescence

Calcining an amorphous precursor in flowing hydrogen at 900 °C directly produced nanocrystalline La2O2S:Pr3+ powder (LOS:Pr3+; average size ∼35 nm) of a unimodal distribution of particle size (mean diameter ∼90 nm). The precursor, precipitated by titrating an aqueous solution of rare-earth nitrate and ammonium sulfate with ammonia water, was deduced to have an approximate composition of (La,Pr)2(OH)2.6(CO3)0.7SO4·2H2O. Aside from simplicity, the synthesis method reported herein has the obvious advantage of environmental friendliness, as it did not involve any harmful sulfidizing agent. The products were characterized in detail by XRD, FTIR, TG/DTA, and SEM/TEM to reveal the process of phase/morphology development and fine microstructure. Photoluminescence study found that the LOS:Pr3+ nanopowder exhibited strong luminescence at ∼508 nm (3P0,1 → 3H4 transition), with a fluorescence lifetime of ∼4.22 ± 0.03 μs, either through exciting the LOS host (∼263 nm, more efficient) or directly exciting the Pr3+ activator (∼304 nm), and retained ∼45% of its room-temperature intensity at 150 °C. Aside from phosphor application, the thus-synthesized powder would be useful for the fabrication of ceramic scintillators because of its nanosized crystallites and narrow distribution of particle size.

Luminescence and optical thermometry based on silico-carnotite Ca3Y2Si3O12: Pr3+ phosphor

The photoluminescence and temperature sensitivities of Ca3Y2Si3O12:Pr3+ thermo-phosphors with silico-carnotite structure obtained by solid state reaction method were investigated. Pr3+ ions were accommodated in the A sites having coordination number of 9 in AB2C2(SiO4)3 to replace Y3+ ions. The typical sample consisted of microcrystals with an irregular structure and the surface of particles was smooth, which could enhance the luminescence due to reducing the scattering and non-radiation produced by rough surfaces. The band gap value of typical sample was about 4.01 eV. Dipole-dipole interaction could account for concentration quenching. The two thermometry strategies including normalized intensities from 3P0→3H4 transition and Fluorescence intensity ration (FIR) of 3P0→3H4/3P1→3H5 transitions were employed for temperature sensing in 298–573 K. The results revealed that Ca3Y2Si3O12:Pr3+ thermo-phosphors had good temperature sensitivity performance with maximum Sr of 0.59% K−1@573 K and 0.762% K−1@298 K in the above two methods, respectively. Hence, Ca3Y2Si3O12:Pr3+ would be a promising candidate in the field of optical thermometry.

Synthesis, structure, phase controlled colour tuning of dinuclear Pr(III) and Tb(III) complexes with fluorinated β-diketone and heterocyclic Lewis base as UV light converters

Heteroleptic homo dinuclear complexes, [Pr(fod)3(μ-bpp)Pr(fod)3] and [Tb(fod)3(μ-bpp)Tb(fod)3] (fod is the anion of 6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octanedione (Hfod) and bpp is 2,3-bis(2-pyridyl)pyrazine) have been synthesized and thoroughly characterized. The 1H NMR spectra of the complexes are consistent with the dinuclear complex formation. In the absorption spectra, the 3P2 ← 3H4, 3P1 + 1I6 ← 3H4 and 1D2 ← 3H4 transitions of Pr(III) complex show considerable sensitivity towards the host medium and prominent stark splitting of these transitions is observed in chloroform and dichloromethane. The effect of phase change on photophysical properties of Pr(III) and Tb(III) complexes is investigated by observing the steady state and time resolved fluorescence spectra of the solid complexes, their solutions and PMMA doped thin hybrid films. Intense emission is observed for the PMMA doped hybrid materials of the complexes. In the case of [Pr(fod)3(μ-bpp)Pr(fod)3] complex doped PMMA, additional emission peaks are observed from the high energy excited states (3P2, 1I6, 3P1 and 3P0), indicating that the PMMA facilitates emission from the higher emitting levels. The emitting colour of Pr(III) complex shows phase dependence with the emission of blue and purple light in the solutions, orange in solid state and in the case of PMMA doped hybrid films at a doping concentration of 5 % and 10 %, the Commission Internationale de l'Eclairage (CIE) colour coordinates are in the white region x = 0.351, y = 0.377 and light blue region x = 0.313, y = 0.319, respectively. Intense green light emission is observed for the terbium complex in all media. The semiempirical theoretical tool of Sparkle/PM7 has been used for obtaining the geometry of the complexes.

Passively Q-switched Tm:YAP laser with a zeolitic imidalate framework-67 saturable absorber operating at 3H4→3H5 transition

In the present work, we report the first Q-switching operation at ∼ 2.3 µm based on a Tm3+:YAlO3 (Tm:YAP) crystalline gain medium and a zeolitic imidazolate framework-67 (ZIF-67) saturable absorber. The ZIF-67 nanomaterials were designed and fabricated to possess a small size in the range from 200 to 500 nm in order to the reduce the possible scattering when working as the nonlinear optical modulator. Based on the conventional Z-scan technique with a home-made excitation source at 2275 nm, the modulation depth of ZIF-67 saturable absorber was determined as large as 6.9%, indicating the great potential in the short Q-switching pulse generation. With an output coupler (OC) of T = 0.5%, a maximum output power of 455 mW was achieved with a slope efficiency of 27%. For the Q-switching operation at 2.3 µm with ZIF-67 saturable absorber, the highest output power of 220 mW and a minimum pulse duration of 220 ns were obtained with a pulse repetition rate of 95 kHz at 2271.7 nm.

Upconversion Visible Light Emission in Yb/Pr Co-Doped Yttria-Stabilized Zirconia (YSZ) Single Crystals

As a development on previous research on single crystals of Pr3+-doped yttria-stabilized zirconia (YSZ), we report here the preparation and optical properties of Yb/Pr co-doped YSZ single crystals with different Yb2O3 concentrations. Results from X-ray diffraction (XRD) and Raman spectroscopy indicated that all of the crystal samples had a cubic phase structure, and transmission was ≥88% in the 550–780 nm range. Photoluminescence (PL) under excitation with a 980 nm laser showed upconversion emission, and several peaks were observed centered on 448 nm, 508 nm, 525 nm, 542 nm, 617 nm and 656 nm. The effects of excited state absorption (ESA), energy transfer upconversion (ETU), cross relaxation (CR), and cooperative energy transfer (CET) on the upconversion luminescence and energy transition mechanism in YSZ crystals were further studied. The fluorescence lifetime of the 3P0 → 3H5 transition at 542 nm reached 207 μs, which shows that the samples are of potential use for laser and fluorescence output.

Strain modulated luminescence in (Ca,Sr)TiO3:Pr3+ perovskite thin films

We report in-plane strain effect on the photoluminescence property of perovskite phosphor thin films. Epitaxial perovskite thin films of Ca0.6Sr0.4TiO3:Pr3+ phosphor were prepared on perovskite oxide substrates with different lattice constant a, LaAlO3 (LAO, a = 3.815 Å), (LaAlO3)0.3-(SrAl0.5Ta0.5O3)0.7(LSAT, 3.868 Å), and SrTiO3 (STO, 3.905 Å) by a pulsed laser deposition method. From X-ray diffraction, the lattice constants of thin films on LAO, LSAT, and STO substrates were (a, c) = (3.815 Å, 3.956 Å), (3.871 Å, 3.880 Å), and (3.905 Å, 3.865 Å), respectively. Therefore it was confirmed that compressive-strained (∼4%), nearly strain-free, and tensile-strained (∼1%) films were obtained on the LAO, LSAT and STO substrates, respectively. Under N2 laser excitation at 337 nm which is above bandgap energy of thin films, the CSTO film on STO (tensile-strained) and on LSAT (strain-free) substrate showed intense red photoluminescence peaking at 612 nm due to Pr3+:1D2→3H4 transition and no photoluminescence lines from the 3PJ revels were observed at 300 K. On the other hand, the phosphor film on LAO (compressive-strained) showed blue and red luminescence which ascribed to the transitions from the Pr3+:3P0 level below 200 K. These results showed that initial state of photoluminescence can be tuned from the 1D2 level to the 3P0 level by biaxial strain not by composition in the Pr3+ doped perovskite phosphor films. The temperature dependence of photoluminescence was also explained by simplified four-level-model with carrier-trapping-center probably related to Ti center.

Tailoring the Energy Storage Properties of the Lu2(Ge,Si)O5:Pr Phosphors Varying the Ge:Si Ratio

Lu2(Gex,Si1−x)O5:Pr phosphors were recently reported as very good multimodal luminescence thermometers. However, their luminescence decay traces exhibited profound background at some temperatures, which was detrimental for their thermometric performance. We set out to reveal the possible reasons for such properties. Thermoluminescence glow curves recorded observing either the total emission generated by the Pr3+ activator or only one of its three components resulting from the 5d → 4f, 3P0 → 3H4, and 1D2 → 3H4 transitions, allowed us to understand that the phosphors show a very strong capability of excited carriers trapping. These are released while the sample temperature reaches the value when the traps become thermally unstable. Consequently, at some temperature ranges, the luminescence arises both from photoluminescence and persistent luminescence. This is what deteriorates the thermometric properties of the phosphors family. For the luminescence intensity ratio mode or the decay time mode, such properties are evidently unfavorable and should not be neglected in critical analysis of the data.

Temperature dependence of red emission in YPO4:Pr3+ nanopowders

In order to compare spectroscopic properties between nanosized and that in single crystal form of YPO4:Pr3+, temperature-dependence of the red emission from 3P0 → 3H4 and 1D2 → 3H4 transitions of YPO4:0.1 at. % Pr3+ nanopowders has been investigated in details. The emission spectra of the sample in size of 20 nm, under selective excitation at 3P2, measured at different temperatures, T = 10, 100, 200 and 300 K have been recorded. The variation of emission intensity of each 3P0 → 3H4 and 1D2 → 3H4 against temperature has been investigated. Several spectral lines constitute 1D2 → 3H4 emission, assigned to transitions between 1D2 and 3H4 Stark levels are observed with no noticeable shifts between them and those observed at the single crystal. It is found that 1D2 → 3H4 emission intensity dominates that of 3P0 → 3H4 transition, pointing out the high efficiency of the multiphonon relaxation (MPR) process from 3P0 to 1D2. Fitting the temperature dependence of 3P0 → 3H4 emission intensity permits to estimate the phonons and their energies involved in non-radiatively transition between 3P0 and 1D2 levels, which are found different from single crystal. Also, fitting the multiphonon relaxation (MPR) rates against temperature, extracted from the measured 1D2 lifetime gives information that seven phonons can be involved to bridge the gap between 1D2 and 1G4. Furthermore, the possibility to use the YPO4: 0.1 at. % Pr3+ in the nano-thermometry application in temperature range T = 10–300 K was investigated.

Effect of silver co-doping on luminescence of the Pr3+-doped lithium tetraborate glass

Spectroscopic and luminescent properties of the Pr-doped and Pr–Ag co-doped borate glasses with Li2B4O7 (Li2O–2B2O3) composition are studied and discussed. Experimental and theoretical oscillator strengths (fexp and ftheor), phenomenological parameters (Ω2, Ω4, Ω6), radiative properties (Arad, β, τrad), and quantum efficiencies (η) of the Pr3+ luminescence were calculated basing on the obtained experimental results and Judd–Ofelt theory. Most intense band of the Pr3+ luminescence is peaked at 601 nm (1D2 → 3H4 transition). Presence of the isolated Ag+ (4d10, 1S0) ions, small non-plasmonic Ag aggregates (Agmn+ nanoclusters), and plasmonic Ag metallic nanoparticles in the Li2B4O7:Pr,Ag glass was proposed basing on analysis of the photoluminescence and optical absorption spectra. Observed enhancement of luminescence intensity and increasing of stimulated emission cross-section and quantum efficiency of luminescence in the Li2B4O7:Pr,Ag glass is explained by energy transfer from Ag species to the Pr3+ ions as wells local-field effect induced by Ag nanoparticles.

Albumin assisted sol-gel synthesized SrSnO3: Pr3+ red persistent phosphors for temperature sensing

SrSnO3: Pr3+ phosphors with red long afterglow (LAG)and temperature sensing were prepared by albumin assisted sol-gel method. The typical sample had cubic structure. The mean particle size was about 2.02 μm. The band gap values of samples were in the range of about 4.06–4.09 eV. The luminescent properties and LAG behaviors of SrSnO3: Pr3+ phosphors were investigated and the luminescence mechanism of red LAG was discussed. Albumin assisted SrSnO3: Pr3+ phosphor with a red long afterglow had an average decay time of 74.25 s. Pr3+ ions not only act as an activator, emitting red long afterglow, but also act as a trap provider. Moreover, the temperature sensing property was studied based on the non-thermal coupling FIR of TE and 3P0→3H4 transition emission. The relative sensitivity was as high as 3580.89/T2. The absolute sensitivity (Sa) and relative sensitivity (Sr) of SrSnO3: 0.5%Pr3+ were 0.0374 K-1 and 4.03% K−1, respectively. Its optical thermometry performance is better than that of most phosphors. It has the potential to be applied in the field of temperature sensing.

Design and modeling of a passively Q-switched diode-pumped Thulium laser at 2.3 [formula omitted

We report on a diode-pumped Tm:LiYF4 laser operating on the 3H4→3H5 transition (at ∼2.3μm) passively Q-switched by a Cr2＋:ZnSe saturable absorber. This laser delivers a maximum average output power of 130 mW at 2304.6 nm with a nearly diffraction limited beam, a linear polarization (π) and no colasing at ∼1.9μm. The corresponding pulse characteristics (duration/energy) are 1.24 μs/3.6 μJ at a repetition rate of 36 kHz. By power scaling under quasi-CW pumping, even shorter pulse durations of 870 ns and higher pulse energies of 6.1 μJ are achieved. The performance of the laser is simulated using a model of a quasi-four-level gain medium and a “slow” saturable absorber showing a good agreement with the experiment. The effect of the thermal lens of the saturable absorber on the pulse characteristics is discussed.

Probing structure of ytterbium stabilized Pr-doped zirconia obtained by microwave hydrothermal method

Nanoparticles of ZrO2:Pr stabilized with ytterbium in the range 0.5%mol.-20%mol. were synthesized. Crystallite sizes depended on Yb concentration. Red luminescence resulting from 1D2→3H4 transition of Pr3+ is present in all the samples. Additionally in the samples calcined at 1200 °C blue-green luminescence from 3P0 level of Pr3+ was found. This emission was more intense than red one. Intensity of the 3P0→3H4 luminescence depended on ytterbium content and was found to be the highest at 20% mol. Yb. Luminescence study had shown, that ytterbium introduced additional lattice defects. Some quantity of praseodymium activator ions were found to be present at +4 state and changed its valence to +3 as ytterbium content had risen.

Intense mechanoluminescence and photostimulated luminescence with less afterglow in Pr3+/Gd3+ co-doped LiTaO3 phosphors

LiTaO3:Pr3+,Gd3+ phosphors were obtained by traditional solid-state reaction methods. In order to study their characteristics, crystal structure, photoluminescence (PL), mechanoluminescence (ML), and thermoluminescence (TL) of materials were measured. The phosphors exhibited intense orange photoluminescence, and mechanoluminescence with two emission bands located at 511 and 618 nm, which are ascribed to 3P0 to 3H4 and 1D2 to 3H4 transitions of Pr3+, respectively. Mechanoluminescence intensity in LiTaO3:Pr3+ was greatly enhanced by co-doped Gd3+ ions. The optimal co-doped concentration of Gd3+ was 1 mol%, and the ML intensity was about 173% times higher, compared with that of LiTaO3:Pr3+. An extremely small disturbance of afterglow (AG) was noted and the trap quality was measured through TL curves. The enhanced mechanoluminescence intensity was thought to be ascribed to the regulated trap quantities and trap depths caused by co-doped Gd3+ ions. The photostimulated luminescence (PSL) was also measured, Pr3+/Gd3+ co-doped LiTaO3 turned out to have good optical storage properties. In this work, a probable mechanism was proposed to elaborate the multi-luminescence process in LiTaO3:Pr3+,Gd3+, which thus expanded the application of mechanoluminescence materials in optical information storage.

A novel high-sensitive optical thermometer based on the multi-color emission in Pr3+ doped LiLaMgWO6 phosphors

Nowadays, optical thermometric materials with high sensing sensitivity in a wide temperature interval are urgently required due to the appealing prospect in the field of sensing technology. Herein, the double perovskite Pr3+: LiLaMgWO6 phosphors are successfully prepared via a high-temperature solid-state reaction method, and their concentration/temperature-dependent luminescence properties are discussed systematically. Upon UV excitation, the samples emit blue (3P0→3H4), green (3P0,1 → 3H5) and red emissions (1D2→3H4, 3P0→3F2) from Pr3+ ions. The different changing tendencies in relation to temperature are observed for the emissions from 3P0 and 1D2 multiplets, which are attributed to the effects of cross-over process to Pr3+-W6+ intervalence charge transfer (IVCT) state, cross relaxation process and multiphonon relaxation process. When the fluorescence intensity ratio (FIR) between 3P0→3F2 (654 nm) and 1D2→3H4 (616 nm) transitions is applied for temperature sensing, 0.5%Pr3+: LiLaMgWO6 displays a maximum absolute sensing sensitivity of 2421 × 10−4 K−1 at 573 K. Moreover, it can keep a comparatively high relative sensitivity (1%~3.25% K−1) and low temperature uncertainty (0.15–0.5 K) over a wide temperature range (~280 K), which are superior to those of many luminescence materials reported previously. The present study may provide useful design information to develop high-sensitive luminescent thermometers with a wide applicable temperature range.