共查询到20条相似文献,搜索用时 24 毫秒
1.
Wenjing Liu Dan Wang Yuhua Wang Jiachi Zhang Haibo Tao 《Journal of the American Ceramic Society》2013,96(7):2257-2263
K3Gd(PO4)2:RE3+ (RE = Eu, Tb) are prepared by solid‐state reaction and their photoluminescence (PL) properties are investigated under UV and VUV excitation, respectively. The obtained experimental data show that no energy transfer happens among the activator ions Tb3+ or Eu3+ under UV excitation. Under 147‐nm excitation, the strongest emission intensity of K3Gd(PO4)2:RE3+ (RE = Eu, Tb) is obtained when the activator ions Tb3+ or Eu3+ concentration is 0.8 mol, the integrate emission intensity of K3Gd0.2(PO4)2:0.8Tb3+ is about 204% of commercial phosphor Zn1.96SiO4:0.04Mn2+ with chromaticity coordinates of (0.340, 0.561) and the decay time of about 5.09 ms under 147‐nm excitation. We analyze the experimental data and propose a possible energy‐transfer mechanism under 147‐nm excitation. 相似文献
2.
《Ceramics International》2016,42(15):16579-16583
Tb3+-Sm3+ co-doped Sr9Gd(PO4)5(SiO4)F2 (SGPSF) phosphors were prepared through a solid-state reaction, and their luminescence properties as well as energy transfer mechanism have been investigated in detail. The SGPSF:Tb3+, Sm3+ phosphors system could be efficiently excited at wavelengths ranging from 200 to 500 nm, which is well matched with the spectra of near ultraviolet chips. The emission of SGPSF:Tb3+, Sm3+ phosphor covers the entire visible region with sharp peaks in the blue, green, and red regions. The emission color of SGPSF:Tb3+, Sm3+ could be adjusted from green (0.275, 0.378) to red (0.519, 0.295) by controlling the doping content of Sm3+/Tb3+. 相似文献
3.
This work presents the ultraviolet–visible spectroscopic properties of Ba3Y2(BO3)4:Ce3+,Tb3+ phosphors prepared by a high‐temperature solid‐state reaction. Under ultraviolet light excitation, tunable emission from the blue to yellowish‐green region was obtained by changing the doping concentration of Tb3+ when the content of Ce3+ is fixed. The efficient energy transfer process between Ce3+ and Tb3+ ions was observed and confirmed in terms of corresponding excitation and emission spectra. In addition, the energy transfer mechanism between Ce3+ and Tb3+ was proved to be dipole–dipole interaction in Ba3Y2(BO3)4:Ce3+,Tb3+ phosphor. By utilizing the principle of energy transfer and appropriate tuning of Ce3+/Tb3+ contents, Ba3Y(BO3)4:Ce3+,Tb3+ phosphors can have potential application as an UV‐convertible phosphor for near‐UV excited white light‐emitting diodes. 相似文献
4.
A single‐phase full‐color emitting phosphor Na3Sc2(PO4)3:Eu2+/Tb3+/Mn2+ with near‐zero thermal quenching and high quantum yield for near‐UV converted warm w‐LEDs 下载免费PDF全文
Dong Liu Yahong Jin Yang Lv Guifang Ju Chuanlong Wang Li Chen Weiwei Luo Yihua Hu 《Journal of the American Ceramic Society》2018,101(12):5627-5639
A single‐phase full‐color emitting phosphor Na3Sc2(PO4)3:Eu2+/Tb3+/Mn2+ has been synthesized by high‐temperature solid‐state method. The crystal structure is measured by X‐ray diffraction. The emission can be tuned from blue to green/red/white through reasonable adjustment of doping ratio among Eu2+/Tb3+/Mn2+ ions. The photoluminescence, energy‐transfer efficiency and concentration quenching mechanisms in Eu2+‐Tb3+/Eu2+‐Mn2+ co‐doped samples were studied in detail. All as‐obtained samples show high quantum yield and robust resistance to thermal quenching at evaluated temperature from 30 to 200°C. Notably, the wide‐gamut emission covering the full visible range of Na3Sc2(PO4)3:Eu2+/Tb3+/Mn2+ gives an outstanding thermal quenching behavior near‐zero thermal quenching at 150°C/less than 20% emission intensity loss at 200°C, and high quantum yield‐66.0% at 150°C/56.9% at 200°C. Moreover, the chromaticity coordinates of Na3Sc2(PO4)3:Eu2+/Tb3+/Mn2+ keep stable through the whole evaluated temperature range. Finally, near‐UV w‐LED devices were fabricated, the white LED device (CCT = 4740.4 K, Ra = 80.9) indicates that Na3Sc2(PO4)3:Eu2+/Tb3+/Mn2+ may be a promising candidate for phosphor‐converted near‐UV w‐LEDs. 相似文献
5.
Preparation,luminescence properties and energy transfer of Ca9Y(PO4)7: Eu2+‐Tb3+ phosphors 下载免费PDF全文
Miao Tang Yanting Fan Zhongxian Qiu Jilin Zhang Liping Yu Chengzhi Li Shixun Lian Wenli Zhou 《Journal of the American Ceramic Society》2017,100(7):2991-2996
Tb3+‐doped and Eu2+, Tb3+ co‐doped Ca9Y(PO4)7 phosphors were synthesized by conventional solid‐state method. Additionally, the luminescence properties, decay behavior and energy transfer mechanism have already been investigated in detail. The green emission intensity of Tb3+ ions under NUV excitation is weak due to its spin‐forbidden f‐f transition. While Eu2+ can efficiently absorb NUV light and yield broad blue emission, most of which can be absorbed by Tb3+ ions. Thus, the emission color can be easily tuned from cyan to green through the energy transfer of Eu2+→Tb3+ in Ca9Y(PO4)7:Eu2+,Tb3+ phosphor. In this work, the phenomenon of cross‐relaxation between 5D3 and 5D4 are also mentioned. The energy transfer is confirmed to be resulted from a quadrupole‐quadrupole mechanism. 相似文献
6.
《Ceramics International》2016,42(12):13919-13924
A series of green-to-red color-tunable Sr3La(PO4)3:Tb3+, Eu3+ phosphors were prepared by high temperature solid-state method. The crystal structures, photoluminescence properties, fluorescence lifetimes, and energy transfer of Sr3La(PO4)3:Tb3+, Eu3+ were systematically investigated in detail. The obtained phosphors show both a green emission from Tb3+ and a red emission from Eu3+ with considerable intensity under ultraviolet (UV) excitation (~377 nm). The emission colors of the phosphors can be tuned from green (0.304, 0.589) through yellow (0.401, 0.505) and eventually to red (0.557, 0.392) due to efficient Tb3+-Eu3+ energy transfer (ET). The Tb3+→Eu3+ energy transfer process was demonstrated to be quadrupole-quadrupole mechanism by Inokuti-Hirayama model, with maximum ET efficiency of 86.3%. The results indicate that the Sr3La(PO4)3:Tb3+, Eu3+ phosphors might find potential applications in the field of lighting and displays. 相似文献
7.
Mengmeng Jiao Qinfeng Xu Yimei Xu Yalin Li Chuanlu Yang Mingliang Liu 《Ceramics International》2018,44(13):15243-15248
Series of UV excited Ba3Lu(PO4)3:Tb3+,Mn2+ phosphors with tunable green to red emissions had been prepared using solid state reactions. Powder X-ray diffraction and Rietveld structure refinement were used to investigate the phase purity and crystal structure of the prepared samples. Under UV excitation, the Ba3Lu(PO4)3:Tb3+,Mn2+ samples exhibited not only the typical Tb3+ emission peaks but also the broad emission band of Mn2+ ions due to the efficient Tb3+→Mn2+ energy transfer which had been verified by luminescence spectra and decay curves. Utilizing the Inokuti-Hirayama model, the Tb3+→Mn2+ energy transfer mechanism was determined to be the electronic dipole–quadrupole interaction. Moreover, the emission spectra of Ba3Lu(PO4)3:0.80Tb3+,0.015Mn2+ sample at different temperatures manifested that our prepared phosphors possessed good thermal stability. The luminescence properties investigation results revealed the potential value of Ba3Lu(PO4)3F:Tb3+,Mn2+ in application for UV excited phosphor converted white light emitting diodes. 相似文献
8.
White‐Emitting Tuning and Energy Transfer in Eu2+/Mn2+‐Substituted Apatite‐Type Fluorophosphate Phosphors 下载免费PDF全文
Ning Guo Chengzheng Jia Jing Li Yuefeng Zhao Ruizhuo Ouyang Wei Lü 《Journal of the American Ceramic Society》2015,98(4):1162-1168
Herein, a series of Eu2+&Mn2+substituted fluorophosphates Ca6Gd2Na2(PO4)6F2 phosphor with apatite structure have been synthesized and investigated by the powder X‐ray diffraction, photoluminescence spectra, fluorescence decay curves, thermal quenching, and chromaticity properties. Particularly, both Eu2+ and Mn2+ emissions at the two different lattice sites 4f and 6h in Ca6Gd2Na2(PO4)6F2 matrix have been identified and discussed. The dual energy transfer of Eu2+→Mn2+ and Gd3+→Mn2+ in Ca6Gd2Na2(PO4)6F2:Eu2+,Mn2+ samples have been validated and confirmed by the photoluminescence spectra. The dependence of color‐tunable on the activator concentration of Mn2+ was investigated to realize white light emission. By varying the doping concentration of the Mn2+ ion, a series of tunable colors including pure white light and candle light are obtained under the excitation of 350 nm. Moreover, the fluorescence decay curves have been fitted and analyzed using the Inokuti–Hirayama theoretical model to estimate the Eu–Mn interaction mechanism. We also investigated temperature‐dependent photoluminescence quenching characteristics according to the Arrhenius equation. Preliminary studies on the properties of the phosphor indicated that the obtained phosphors might have potential application as a single‐component white‐emitting phosphor for UV‐based white LEDs. 相似文献
9.
《Ceramics International》2021,47(24):34721-34731
A series of Sr9Y(PO4)7:Eu3+ and Sr9Y(PO4)7:Eu3+, Gd3+ red-emitting phosphors were prepared via a high-temperature solid-state method, Gd3+ ion was co-doped in Sr9Y(PO4)7:Eu3+ as sensitizer to enhance the luminescence property. The X-ray diffraction results verify that the structure of the as-prepared samples is consistent with the standard Sr9Y(PO4)7 phase. All the Sr9Y(PO4)7:Eu3+ samples show both characteristic emission peaks at 594 nm and 614 nm under near-ultraviolet excitation of 394 nm. The co-doping of Gd3+ significantly improves the luminescence intensity of the Sr9Y(PO4)7:Eu3+ phosphors due to the crystal field environment effect and energy transfer of Gd3+→Eu3+ caused by the introduction of Gd3+, especially Sr9Y(PO4)7:0.11Eu3+, 0.05Gd3+, which emission intensity is higher than that of Sr9Y(PO4)7:0.11Eu3+ by 1.21 times. The color purity and lifetime of Sr9Y(PO4)7:0.11Eu3+, 0.05Gd3+ phosphor are 88.26% and 3.7615 ms, respectively. A w-LED device was packaged via coating the as-prepared phosphor on n-UV chip of 395 nm with commercial phosphors. These results exhibit that the Sr9Y(PO4)7:Eu3+, Gd3+ red-emitting phosphor can be used as a red component in the w-LEDs application. 相似文献
10.
Synthesis and luminescence properties of single‐component Ca5(PO4)3F:Dy3+, Eu3+ white‐emitting phosphors 下载免费PDF全文
Meng Yu Wentao Zhang Shiyu Qin Junfeng Li Kehui Qiu 《Journal of the American Ceramic Society》2018,101(10):4582-4590
A series of Ca5(PO4)3F:Dy3+, Eu3+ phosphors was synthesized by a solid‐state reaction method. The XRD results show that all as‐prepared Ca5(PO4)3F:Dy3+, Eu3+ samples match well with the standard Ca5(PO4)3F structure and the doped Dy3+ and Eu3+ ions have no effect on the crystal structure. Under near‐ultraviolet excitation, Dy3+ doped Ca5(PO4)3F phosphor shows blue (486 nm) and yellow (579 nm) emissions, which correspond to 4F9/2→6H15/2 and 4F9/2→6H13/2 transitions respectively. Eu3+ co‐doped Ca5(PO4)3F:Dy3+ phosphor shows the additional red emission of Eu3+ at 631 nm, and an improved color rendering index. The chromaticity coordinates of Ca5(PO4)3F:Dy3+, Eu3+ phosphors also indicate the excellent warm white emission characteristics and low correlated color temperature. Overall, these results suggest that the Ca5(PO4)3F:Dy3+, Eu3+ phosphors have potential applications in warm white light‐emitting diodes as single‐component phosphor. 相似文献
11.
Yuanyuan Zhang Lefu Mei Sergey M. Aksenov Dina Deyneko Haikun Liu Dian Zhang Zhaohui Huang 《Journal of the American Ceramic Society》2020,103(4):2602-2609
Ca9La(PO4)5(SiO4)F2:Tb3+,Dy3+ (CLPSF:Tb3+,Dy3+) phosphors were successfully prepared using the traditional solid-state technique. The crystal structure was refined and the luminescence properties have been examined in detail. The band gap and electronic structure of Ca9La(PO4)5(SiO4)F2 were performed by the periodic density functional theory (DFT) calculation. The spectral and fluorescence decay dynamics of CLPSF:Tb3+,Dy3+ show that the energy transfer behavior between Tb3+ and Dy3+ ions is observed. The CLPSF:Tb3+,Dy3+ phosphors can be efficiently excitable at the wavelengths range from 300 to 500 nm. The emission spectrum covers the whole visible part of the spectra with the sharp emission bands in red, green, and blue regions. The correlated color temperature (CCT) and color rendering index (CRI) of white light emission could be improved by the fine-tuning of the Tb3+ and Dy3+ ions ration in accordance with the energy transfer behavior. Thus, the CLPSF:Tb3+,Dy3+ phosphor could be used as a material for the near-ultraviolet (n-UV) and white light-emitting diodes (w-LEDs). 相似文献
12.
C. B. Palan N. S. Bajaj K. A. Koparkar A. Soni S. K. Omanwar 《Journal of Inorganic and Organometallic Polymers and Materials》2016,26(4):845-854
The series of LiMgPO4:Tb3+/Tb, B phosphors were synthesized via modified solid state method. The structural and morphological characterization was done through X-ray diffraction and Scanning Electronic Microscope. Additionally, photoluminescence (PL), thermoluminescence (TL) and optically stimulated luminescence (OSL) properties of prepared phosphors were studied. Also Linear Modulated-OSL, Non Linear OSL, dose response, fading and reusability were studied. The LiMg(0.85)PO4:0.005Tb3+, 0.01B (LMPTB) phosphor shows good OSL sensitivity, which was found to be 1.70 and 1.04 times more than α-Al2O3:C (BARC) and LiMgPO4:Tb3+, B (BARC) phosphors respectively and minimum detectable dose was found to be 16.4 μGy with 3σ of background. The effective atomic number of LMPTB phosphor (Zeff = 11.44) is nearly similar to Zeff of α-Al2O3:C phosphor (Zeff = 11.28). The prepared phosphor show linear dose response in the range 0.04–24 Gy and fading of the OSL signal was found to be about 34 % in 35 days. The TL glow curve of LiMgPO4:Tb phosphor was stable after addition of boron. The PL spectra show characteristic emission of Tb3+ ion. This prepared phosphor is applicable personal monitoring and environmental monitoring. 相似文献
13.
Xinguo Zhang Liya Zhou Qi Pang Menglian Gong 《Journal of the American Ceramic Society》2014,97(7):2124-2129
A series of Ce3+, Tb3+, Eu3+ tri‐doped Ba2Y(BO3)2Cl red‐emitting phosphor have been synthesized by solid‐state method. The Ce3+→Tb3+→Eu3+ energy‐transfer scheme has been proposed to realize the sensitization of Eu3+ ion emission by Ce3+ ions. Following this energy‐transfer model, near‐UV convertible Eu3+‐activated red phosphors have been obtained in Ba2Y(BO3)2Cl: Ce3+, Tb3+, Eu3+ phosphors. Energy transfers from Ce3+ to Tb3+, and Tb3+ to Eu3+, as well as corresponding energy‐transfer efficiencies are investigated. The combination of narrow‐line red emission and near‐UV broadband excitation makes Ba2Y(BO3)2Cl: Ce3+, Tb3+, Eu3+ as a novel and efficient red phosphor for NUV LED applications. 相似文献
14.
A series of single-component blue, green and red phosphors have been fabricated based on the Ca3Gd(GaO)3(BO3)4 host through doping of the Ce3+/Tb3+/Eu3+ ions, and their crystal structure and photoluminescence properties have been discussed in detail. A terbium bridge model via Ce3+ → Tb3+ → Eu3+ energy transfer has been studied. The emission colours of the phosphors can be tuned from blue (0.1661, 0.0686) to green (0.3263, 0.4791) and eventually to red (0.5284, 0.4040) under a single 344 nm UV excitation as the result of the Ce3+ → Tb3+ → Eu3+ energy transfer. The energy transfer mechanisms of Ce3+ → Tb3+ and Tb3+ → Eu3+ were found to be dipole-dipole interactions. Importantly, Ca3Gd(GaO)3(BO3)4:Ce3+,Tb3+,Eu3+ phosphors had high internal quantum efficiency. Moreover, the study on the temperature-dependent emission spectra revealed that the Ca3Gd(GaO)3(BO3)4:Ce3+,Tb3+,Eu3+ phosphors possessed good thermal stability. The above results indicate that the phosphors can be applied into white light-emitting diodes as single-component multi-colour phosphors. 相似文献
15.
Phase Transformation in Ca3(PO4)2:Eu2+ via the Controlled Quenching and Increased Eu2+ Content: Identification of New Cyan‐Emitting α‐Ca3(PO4)2:Eu2+ Phosphor 下载免费PDF全文
Haipeng Ji Zhaohui Huang Zhiguo Xia Maxim S. Molokeev Mingyue Chen Victor V. Atuchin Minghao Fang Yan'gai Liu Xiaowen Wu 《Journal of the American Ceramic Society》2015,98(10):3280-3284
A case of phosphor is reported where the cooling rate parameter significantly influences the luminescence property. By quenching the sample after the high‐temperature solid‐state reaction at 1250°C, we successfully prepared the Eu2+‐doped α form Ca3(PO4)2 (α‐TCP:Eu2+) as a new kind of bright cyan‐emitting phosphor. The unusual emission color variation (from cyan to blue) depends on the cooling rate after sintering and Eu2+ doping level as it was observed in the TCP‐based phosphors. By the Rietveld analysis, it is revealed that the cyan‐ and blue‐emitting phosphors are two different TCP forms crystallizing in the monoclinic (space group P21/a, α‐TCP) and the rhombohedral structure (space group R3c, β‐TCP), respectively. Upon 365 nm UV light excitation, α‐TCP:Eu2+ exhibits an asymmetric broad‐band cyan emission peaking at 480 nm, while β‐TCP:Eu2+ displays a relatively narrow‐band blue emission peaking at 416 nm. The Eu2+‐doping in Ca3(PO4)2 shifts the upper temperature limit of the stable structural range of β form from 1125°C to ≥1250°C. Moreover, the crystal structures of α/β‐TCP:Eu2+ were compared in the aspects of compactness and cation site sets. The emission thermal stability of α/β‐TCP:Eu2+ was comparatively characterized and the difference was related to the specific host structural features. 相似文献
16.
Hsin‐Cheng Lin Che‐Yuan Yang Subrata Das Chung‐Hsin Lu 《Journal of the American Ceramic Society》2014,97(6):1866-1872
A series of newly developed color‐tunable Ca3La6(SiO4)6: Ce3+, Tb3+ phosphors were successfully prepared in this study. The crystal structures of the prepared phosphors were revealed to be hexagonal with space group P63/m, and the lattice parameters were evaluated via utilizing the Rietveld refinement method. Upon excitation at 288 nm, the emission spectra of Ce3+and Tb3+ ions co‐doped Ca3La6(SiO4)6 phosphors included a blue emission band and several emission lines. The blue emission band with a peak at 420 nm originated in the f–d transitions of Ce3+ ions, and the emission lines in the range of 450–650 nm were assigned to the 5D4 → 7FJ (J = 6, 5, 4, 3) transitions of Tb3+ ions. Increasing the doping content of Tb3+ ions considerably strengthened Tb3+ emission and reduced Ce3+ emission owing to the energy transfer from Ce3+ to Tb3+ ions. The mechanism of the energy transfer was confirmed to be a dipole–dipole interaction. The effective energy transfer from Ce3+ to Tb3+ ions caused a color shift from purplish‐blue to yellowish‐green. Color‐tunable Ca3La6(SiO4)6: Ce3+, Tb3+ phosphors have the potential to be utilized in light‐emitting diodes with proper modulation of the amount of Tb3+ ions. 相似文献
17.
Mubiao Xie Guoxian Zhu Lihua Zeng Feifei Xie Chunyan Liang Xiaoping Zhou 《International Journal of Applied Ceramic Technology》2015,12(4):750-754
The Tb3+/Sm3+ codoped Sr2LiSiO4F white emitting phosphors were synthesized by a solid‐state reaction technique at high temperature. The X‐ray diffraction patterns, photoluminescence properties, and decay behaviors have been investigated. The Tb3+ emissions (blue and green) and Sm3+ emissions (orange) are both observed in the codoped samples Sr2LiSiO4F: 0.05Sm3+, xTb3+ by near‐UV light (370 nm) exciting. The white emission has been obtained by adjusting Tb3+ doping concentration at 5% (x = 0.05). These luminescent powders are expected to be a potential candidate as white emitting phosphor for near‐ultraviolet InGaN‐based white light‐emitting diodes. 相似文献
18.
Using the conventional high temperature solid‐state reaction method Ba2Ca(PO4)2:Eu2+ phosphors were prepared. The phase structure, photoluminescence (PL) properties, and the PL thermal stability of the samples were investigated, respectively. Under the excitation at 365 nm, the phosphor exhibited an asymmetric broad‐band blue emission with peak at 454 nm, which is ascribed to the 4f–5d transition of Eu2+. It was further proved that the dipole–dipole interactions results in the concentration quenching of Eu2+ in Ba2Ca1?x (PO4)2:xEu2+ phosphors. When the temperature turned up to 150°C, the emission intensity of Ba2Ca0.99(PO4)2:0.01Eu2+ phosphor was 59.07% of the initial value at room temperature. The activation energy ΔE was calculated to be 0.30 eV, which proved the good thermal stability of the sample. All the properties indicated that the blue‐emitting Ba2Ca(PO4)2:Eu2+ phosphor has potential application in white LEDs. 相似文献
19.
LiCaAlN2:Eu3+/Tb3+: Red and green phosphors for LEDs and FEDs with charge transfer transition in n‐UV region 下载免费PDF全文
Quansheng Wu Jianyan Ding Yanyan Li Xicheng Wang Yuhua Wang 《Journal of the American Ceramic Society》2017,100(7):3088-3098
LiCaAlN2:Eu3+/Tb3+ red/green phosphors were successfully prepared by conventional solid‐state reaction. The photoluminescence (PL) properties and cathodoluminescence (CL) properties of LiCaAlN2:Eu3+/Tb3+ were investigated in detail. The Eu3+ (Tb3+) doped LiCaAlN2 shows red (green) emission peaking at 615 nm (550 nm). Monitored at 615 nm (550 nm), it is interesting to found that LiCaAlN2:Eu3+ (LiCaAlN2:Tb3+) has a broad charge transfer transition in the range of 350‐450 nm (275‐375 nm) peaking at 380 nm (343 nm), which can be efficiently excited by n‐UV light‐emitting diodes (LEDs). Under electron beam excitation, LiCaAlN2:Tb3+ exhibited a good resistance to the current saturation. The white LED has also been fabricated with blue, green, and LiCaAlN2:Eu3+ red phosphor. The results indicate that LiCaAlN2:Eu3+/Tb3+ could be conducive to the development of phosphor‐converted LEDs and field emission displays (FEDs). 相似文献
20.
Photo/cathodoluminescence and stability of Gd2O2S:Tb,Pr green phosphor hexagons calcined from layered hydroxide sulfate 下载免费PDF全文
Xuejiao Wang Xiaojun Wang Zhihao Wang Qi Zhu Ge Zhu Chuang Wang Shuangyu Xin Ji‐Guang Li 《Journal of the American Ceramic Society》2018,101(12):5477-5486
Hydrothermal reaction at 150°C and pH = 10 for 24 hours crystallized (Gd,RE)2(OH)4SO4 layered hydroxide sulfate (monoclinic structure; RE = Pr, Tb), from which Gd2O2S:RE (hexagonal structure) green phosphor hexagons were derived via facile dehydration in flowing H2 at 1200°C. Rietveld refinement of the XRD patterns yielded cell dimensions that confirmed the direct crystallization of solid solution. Photoluminescence (PL) study at room temperature found absolute quantum yields of ~25.1% and 28.4%, CIE chromaticity coordinates of (0.145, 0.679) and (0.326, 0.566), and fluorescence lifetimes of ~2.36 μs and 1.21 ms for Pr3+ and Tb3+ under 300 and 275 nm UV excitations, respectively. Temperature‐dependent PL analysis (25‐200°C) indicated that both the Pr3+‐ and Tb3+‐doped phosphors have favorably good thermal stability and retained ~65% and 80% at 100°C and ~41% and 47% at 200°C of their initial emission intensities, respectively. The activation energy for the thermal quenching of PL was determined to be ~0.221 (Pr3+) and 0.314 eV (Tb3+). Cathodoluminescence (CL) found that both the phosphors exhibit increasingly higher emission intensity/brightness at a higher acceleration voltage (up to 7 kV) or beam current (up to 50 μA) and are stable under electron bombardment in the studied range. Raising beam current was suggested to be more effective to enhance CL. 相似文献