JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2024
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IF 4.1
Shen-Ao Hu,Yu-Guo Yang,Qian Du,Xiao-Na Shen,Xu-Ping Wang,Qing-Gang Li,Cheng-Cheng Qiu,Hua-Jian Yu,Lei Wei,Xian-Shun Lv,Yuan-Yuan Zhang,Ji-Yang Wang,Rui Zhang,Bing Liu
We prepared BaLaGa 3 O 7 : Bi 3+ ,Sm 3+ phosphors via solid state reactions and investigated their crystallinity, lattice occupancy, and photoluminescence performance. The phase and crystal structure, morphology and size, as well as element composition of phosphor were investigated via a series of measurements. The photoluminescence and Bi 3+ → Sm 3+ energy transfers were investigated in detail. It is proved that Bi 3+ → Sm 3+ energy transfer occurs in Bi 3+ /Sm 3+ codoped BaLaGa 3 O 7 phosphors and it is induced by dipole–dipole interaction. By calculating the decay lifetime, the efficiency of Bi 3+ → Sm 3+ energy transfer is evaluated. The CIE coordinates of the prepared show obvious dependence on Sm 3+ concentration and temperature.
研究领域:
材料科学
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光学
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DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
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2018
·Vol. 102
·期 4
·1822-1831
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IF 2.956
WeiHui Song,XueYan Chen,LiMing Teng,ZhiGang Zheng,Jun Wen,FangFang Hu,RongFei Wei,LiPing Chen,Hai Guo
Single-composition Ba 2 Y 2 Si 4 O 13 :Bi 3+ ,Eu 3+ (BYSO:Bi 3+ ,Eu 3+ ) phosphors with color-tunable and white emission were prepared by conventional high temperature solid-state reaction method. The structural and luminescent properties of these phosphors were thoroughly investigated through X-ray diffraction, photoluminescence, and decay curves. BYSO:Bi 3+ phosphors show two excitation peaks at 342 and 373 nm, and give two emission peaks at 414 and 503 nm, respectively, indicating that there are two sites of Bi 3+ in BYSO. The energy transfer from Bi 3+ to Eu 3+ was investigated in detail. Varied hues from blue (chromaticity coordinate [0.219, 0.350]) to white (0.288, 0.350) and orange-red light (0.644, 0.341) can be generated by adjusting the content of Eu 3+ . Pure white light emission (0.311, 0.338) can be obtained under the excitation of 355 nm in BYSO:3%Bi 3+ ,20%Eu 3+ phosphor. Besides, BYSO:Bi 3+ ,Eu 3+ phosphors exhibit distinct thermal quenching properties, whose emission intensity at 473 K is 82.6% of that at 298 K. Our results indicate that BYSO:Bi 3+ ,Eu 3+ may be applied as conversion phosphors for n-UV-based W-LEDs.
研究领域:
材料科学
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光学
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DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2023
·Vol. 106
·期 10
·5887-5897
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IF 3.9
DanYu Zhang,YuXuan Luo,ShuJun Xu,LianJie Li,JunYu Chen,Lei Lei,Hai Guo
In this paper, Y 4 GeO 8 :Bi 3+ ,Eu 3+ phosphor with dual emission centers was elaborated via conventional solid-state reaction technology. Thorough research on the structure, morphology, and luminous properties of Y 4 GeO 8 :Bi 3+ ,Eu 3+ phosphor, the potential applications in optical thermometry were investigated by means of fluorescence intensity ratio and thermochromic techniques. Under 290 and 347 nm excitation, Y 4 GeO 8 :Bi 3+ ,Eu 3+ phosphor presents broadband emission from 3 P 1 → 1 S 0 transition of Bi 3+ ions and characteristic emission peaks from 4f–4f transition of Eu 3+ ions. Outstanding temperature-sensing capabilities are acquired from Y 4 GeO 8 :Bi 3+ ,Eu 3+ phosphor. The maximum relative sensitivity ( S r ) can attain 1.51% K −1 ( λ ex = 290 nm). With temperature raising (303–513 K), the emitted color of Y 4 GeO 8 :Bi 3+ ,Eu 3+ phosphor ( λ ex = 290 nm) shifts from faint yellow to red with a high chromaticity shift (0.180), which can be distinguished by the unaided eye clearly. Our results indicate that Y 4 GeO 8 :Bi 3+ ,Eu 3+ phosphor has potential applications in optical temperature measurement and high-temperature safety marker.
研究领域:
材料科学
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光学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2016
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IF 3.014
Renping Cao,Ting Fu,Haidong Xu,Wenjie Luo,Dedong Peng,Zhiquan Chen,Jingwei Fu
CaTiO 3 :Bi 3+ and CaTiO 3 :Bi 3+ , Al 3+ /B 3+ phosphors are synthesized by solid-state reaction method in air. With excitation 272 and 320 nm, broad PL band peaking at 555 nm with full width at half maximum ∼200 nm is observed in the range of 400–800 nm due to the 3 P 1,0 → 1 S 0 transitions of Bi 3+ ion. PLE spectrum monitored at 555 nm contains two PLE band peaking at ∼272 and 320 nm within the range 230–420 nm owing to metal-to-metal charge-transfer and 1 S 0 → 3 P 1 transition of Bi 3+ ion, respectively. The optimal Bi 3+ doping concentration in CaTiO 3 :Bi 3+ phosphor is about 0.5 mol%. Luminescence properties of CaTiO 3 :Bi 3+ phosphor may be improved obviously by co-doping Al 3+ /B 3+ ions, and its emission intensity can be enhanced 13–15 times after Al 3+ ion is co-doped. Luminous mechanism of CaTiO 3 :Bi 3+ phosphor is analyzed by energy level diagram of Bi 3+ ion. Decay curve and time-resolved spectra confirm that only a single type of Bi 3+ luminescence center exists in CaTiO 3 :Bi 3+ phosphor.
研究领域:
材料科学
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光学
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发光材料
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DOI
高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Shen-Ao Hu,Bing Liu,Yu-Guo Yang,Qian Du,Yuan-Yuan Zhang,Hua-Jian Yu,Cheng-Cheng Qiu,Xu-Ping Wang,Qing-Gang Li,Ji-Yang Wang
In this paper, cyan BaLaGa 3 O 7 : Bi 3+ phosphors were synthesized by solid-state reaction method at 1400 °C. The crystal structure, elemental composition and optical properties were characterized and studied. The results of X-ray diffraction, X-ray photoelectron spectroscopy, Raman spectroscopy and infrared spectroscopy indicate the successful synthesis of BaLaGa 3 O 7 : Bi 3+ phosphors with the pure phase. The BaLaGa 3 O 7 : Bi 3+ phosphors show wide band emission corresponding to the 3 P 1 → 1 S 0 transition of Bi 3+ when excited at 328 nm.
研究领域:
材料科学
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光学
·
磷光技术
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DOI
高影响因子
INORGANIC CHEMISTRY
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2020
·
IF 4.825
Zhihao Zhou,Puxian Xiong,Huailu Liu,Mingying Peng
Long persistent phosphors (LPPs) with ultraviolet (UV) luminescence have great potential for application in the fields of biomedicine, environmental, and catalysis. However, it is currently limited by the design and development of remarkable UV LPPs with a suitable spectral region and an ultralong afterglow decay time. Herein, we develop a new type of Bi3+-activated LiScGeO4 LPP, which exhibits bright ultraviolet-A (UVA) persistent luminescence (PersL). Because of the existence of numerous stabilized effective traps, the as-synthesized phosphors can undergo an ultralong PersL decay time far longer than 12 h. The PersL properties, effective trap depths, distributions, and types, as well as the possible mechanism for the PersL behavior of LiScGeO4:Bi3+, are comprehensively surveyed utilizing PersL excitation spectra, PersL decay analyses, thermoluminescence experiments, and X-ray photoelectron spectroscopy. This work can cover the shortage of LPPs in the UV region and also can lay the foundation for the development of more excellent UV LPPs toward versatile novel applications.
研究领域:
材料科学
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生物医学
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环境科学
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催化领域
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Hui Zhang,Yazhou Wang,Yan Jiao,Si Chen,Meisong Liao,Yongzheng Fang,Weiqing Gao,Lili Hu
Fluorescent powders exhibiting excitation dependence and luminescent discoloration are profoundly relevant for concealing information and enhancing optical antiforgery protection. In this study, Bi 3+ /Ln 3+ (Eu 3+ , Er 3+ )-doped phosphors exhibiting multicolor luminescence and excitation wavelength dependence were synthesized. The Bi 3+ /Eu 3+ -codoped phosphors emitted blue, pink, lavender, and red lights under excitation from conventional ultraviolet (UV) sources. In addition to emitting blue light, the Bi 3+ /Er 3+ -codoped phosphors also transmitted upconversion-emission light from green to yellow under 980-nm laser excitation. Additionally, the luminous color of the Ca 3 Y 2 Ge 3 O 12 :0.01Bi 3+ , 0.2Er 3+ phosphor changed from yellow to orange as the temperature increased. Combining the above luminous-color-change phenomena, the word-hiding experiment exhibited excellent realistic information hiding, with complex color transformation in the stamen and petal parts of the flower pattern. Furthermore, rapid multimodal and complex discoloration was achieved using easy-to-obtain light sources, confirming the potential of Bi 3+ /Ln 3+ phosphors for anticounterfeiting applications.
研究领域:
材料科学
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光学工程
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DOI
高影响因子
Current Analytical Chemistry
·
2025
·Vol. 21
·期 1
·57-67
·
IF 1.7
Mengfei Yang,Jing Shi,Taiming Luo,Xiaozhan Yang
Aims By using terephthalic acid, 2, 5-furandicarboxylic acid, and terbium nitrate hexahydrate, a Tb-MOF with a core-shell structure was successfully designed and prepared. Methods A one-pot method was employed to design and synthesize core-shell Tb-MOF. The morphology, luminescence performance, and stability were well characterized. Results Tb-MOF demonstrated good water stability, acid and alkali resistance, and thermal stability. Tb-MOF was found to have high sensitivity to detect Cr3+, Bi3+, and acetone in an aqueous solution, and the LOD of Cr3+, Bi3+, and acetone were calculated to be 0.18 μM, 4.22 μM, and 0.26%, respectively. The sensing mechanism of Cr3+ and acetone was explained as energy-competitive absorption, and the sensing mechanism of Bi3+ was explained as ion replacement. Conclusion The prepared Tb-MOF can be developed as a multifunctional light-emitting sensor with high selectivity.
研究领域:
材料科学
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分析化学
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
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2020
·
IF 3.83
Xiuna Tian,Hongjian Dou,Lingyuan Wu
Based on the luminescence of Bi 3+ , novel temperature sensing materials YNbO 4 :Bi 3+ and YNbO 4 :Bi 3+ /Sm 3+ were successfully synthesized by solid state reaction. The XRD patterns show that the synthesized materials have a pure phase of YNbO 4 . With the excitation of 314 nm, the YNbO 4 :Bi 3+ material shows intense temperature-dependent luminescence in the range of 303 K–463 K. Based on the temperature-dependent luminescence of Bi 3+ in YNbO 4 , the maximum relative sensitivity can be obtained at 434 K (1.72% K −1 ). Under the excitation of 406 nm, the YNbO 4 :Sm 3+ material shows the characteristic emission peaks of Sm 3+ . In YNbO 4 :Bi 3+ /Sm 3+ phosphor, the large overlap between the emission spectra of Bi 3+ and the excitation spectra of Sm 3+ leads to a significant energy transfer from Bi 3+ to Sm 3+ . With the excitation of 314 nm, the emission spectra of YNbO 4 :Bi 3+ /Sm 3+ material shows the characteristic peaks of Bi 3+ and Sm 3+ . The luminescence intensity ratio of Sm 3+ and Bi 3+ shows a strong temperature dependence. Based on the luminescence intensity ratio, a large relative sensitivity is obtained at 455 K (1.57% K −1 ).
研究领域:
材料科学
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光学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Shuai Wei,Zhijun Li,Zeyu Lyu,Dashuai Sun,Sida Shen,Jianhui Wang,Chengyu Zhuo,Hongpeng You
In this work, we provide a paradigm how to realize white light emission by utilizing the energy transfer from the Bi 3+ to Eu 3+ ions. First, a novel Bi 3+ activated phosphor set of highly oxygen-deficient perovskite derivatives (Ba 3 YGa 2 O 7.5 , BYGO) were synthesized through the conventional high-temperature solid-state method. The crystal structure was confirmed by Rietveld refinement . Then, Eu 3+ was introduced to the phosphor composition to construct energy transfer pathway with Bi 3+ . The emission color of the BYGO:Bi 3+ ,Eu 3+ phosphors can be changed from cyan to white and orange-red by altering the Bi 3+ /Eu 3+ doping ratio. The energy transfer from the Bi 3+ to Eu 3+ ions was ascribed to dipole-dipole interaction. Finally, a single-component WLED device with a color-rendering index of 84.9 was successfully prepared by employing a near-ultraviolet chip and the BYGO:Bi 3+ ,Eu 3+ phosphors. This work not only indicates that the as-prepared BYGO:Bi 3+ ,Eu 3+ phosphors are a potential candidate for near-ultraviolet WLED, but also demonstrated that energy transfer is an avenue for single-phased white light emission.
研究领域:
材料科学
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光学
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产品关联
DOI
高影响因子
OPTIK
·
2021
·
IF 2.443
Kai Ye,Xiaoliang Yang,Siguo Xiao
Bi 3+ , Mn 2+ co-doped CaZnGe 2 O 6 red long afterglow materials were prepared by high temperature solid state reaction method. The phosphor has broad excitation band ranging from 220 nm to 350 nm with two peaks at 255 nm and 300 nm and can give blue, green and red emission band peaking at 448 nm, 530 nm and 645 nm, respectively. Due to the emission properties of Bi 3+ ions and the Bi 3+ →Mn 2+ energy transfer, the co-doped Bi 3+ ions can not only enhance the PL luminescence of the phosphor, but also adjust the emission color. After irradiation of 300 nm ultraviolet light , the phosphors exhibits long-persistent red phosphorescence. Thermoluminescence tests demonstrate that the introduction of Bi 3+ ions can increase the trap depth and trap concentration, greatly improving the afterglow time and brightness of the CaZnGe 2 O 6 : Mn 2+ phosphor. The present work might provide reference for designing new rare earth free red long afterglow materials.
研究领域:
材料科学
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光学
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DOI
高影响因子
PHYSICA B-CONDENSED MATTER
·
2023
·
IF 2.8
Wang Bo-Hao,Dan Zhao,Zhang Rui-Juan,Yao Qing-Xia,Jia Lei
Developing new phosphors is an important issue for white LED applications. Herein, a simple compound NaAlO 2 with an unusual compact 5-coordinated [NaO 5 ] polyhedral environment is selected as host material. After doping Bi 3+ into NaAlO 2 , Bi 3+ may be occupy the Na-sites and interesting luminescent properties are expected. Experimental results show that phosphor NaAlO 2 :Bi 3+ can emit cyan light under near-UV excitation. More exciting, the luminescent intensity of NaAlO 2 is rather stable under high temperatures, which is due to the good structural rigidity of NaAlO 2 host lattice and the process of trap-to-activator energy transfer. At 450 K, the typical working condition of LED devices, the PL intensity constitutes 92 % of the intensity at 300 K, which can guarantee its luminous efficiency for applications in LED devices. Finally, a white LED was fabricated by using a 365 nm LED ship, and a mixture of CaAlSiN 3 :Eu 2+ (red phosphor), BaMgAl 10 O 17 :Eu 2+ (blue phosphor) and NaAlO 2 :0.007Bi 3+ . The CIE coordinates, rendering index (Ra) and Correlated Color Temperature (CCT) of this lamp are (0.3183, 0.3307), 96.8 and 4429 K. This work confirms that the NaAlO 2 :Bi 3+ material is a promising cyan phosphor for applications in LED field.
研究领域:
材料科学
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光学工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）