JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Renping Cao,Rixing Liang,Lan Li,Ru Liu,Ting Chen,Bang Lan,Youcun Liu,Jing Wang,Chenxing Liao
Bi 3+ , Eu 3+ singly doped and Bi 3+ /Eu 3+ co-doped Ca 9 MgLi(PO) 7 (CMLPO) with a single pure phase are synthesized in air by high-temperature solid-state method and their crystal structure and the luminescence properties are investigated. CMLPO:Bi 3+ with excitation at 313 nm shows blue emission. CMLPO:Eu 3+ with excitation at 318 and 394 nm emits red emission. CMLPO:Eu 3+ , Bi 3+ with excitation at 318 nm shows an adjustable color emission when the ratio between Eu 3+ and Bi 3+ ions is changed. CMLPO:Eu 3+ , Bi 3+ under excitation 394 nm only emits a single red color light. The optimal Eu 3+ concentration in CMLPO:Eu 3+ and Bi 3+ concentration in CMLPO:8 mol%Eu 3+ , Bi 3+ are ∼8 mol% and 2 mol%, respectively. The luminescence intensity of CMLPO:Eu 3+ can be enhanced 1.4–2.2 times when Bi 3+ ion as sensitizer is co-doped into CMLPO:Eu 3+ . The energy transfer process in CMLPO:Eu 3+ , Bi 3+ is observed and analyzed. The luminous mechanisms of samples are explained by using the energy level diagrams of Eu 3+ and Bi 3+ ions. The research in this paper offers effective guidance for the optical property improvement of phosphors by co-doping other ions as sensitizer.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
OPTIK
·
2017
·
IF 0.835
Renping Cao,Kailei Bai,Xing Liu,Wudi Wang,Ting Chen,Siling Guo,Zhiyang Luo,Wensheng Li
A series of CaZn 2 P 2 O 8 :Sm 3+ , Mn 2+ phosphors are synthesized by a solid-state reaction method in air. The crystal structures and luminescence properties are investigated. CaZn 2 P 2 O 8 :Sm 3+ phosphor with excitation 402 nm emits red light in the range of 550–750 nm owing to the 4 G 5/2 → ( 6 H 5/2 , 6 H 7/2 , 6 H 9/2 , and 6 H 11/2 ) transitions of Sm 3+ ion. CaZn 2 P 2 O 8 :Mn 2+ phosphor with excitation 400 nm emits yellow-green light in the range of 500–650 nm due to the 4 T 1 (G) → 6 A 1 transition of the Mn 2+ ion. CaZn 2 P 2 O 8 :Sm 3+ , Mn 2+ phosphor with excitation 400 nm shows a tunable emission in the range of 500–750 nm with changing Sm 3+ or Mn 2+ ion content. The optimal Sm 3+ and Mn 2+ ion concentrations are ∼4 mol% and 3 mol%, respectively.
研究领域:
材料科学
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光学
·
磷光技术
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 21
·10025-10035
·
IF 3.3
Renping Cao,Zibin Lai,Yewen Cao,Fangrui Cheng,Chenxing Liao,Shuijing Nie,Xuehua Yi,Jing Wang
Luminescent materials used in solid-state lighting usually face the challenge of the adjustment of luminescence properties. The coordinated luminescence of two activators in luminescent materials is a good method. Herein, CaAl2Si2O8:Dy3+, CaAl2Si2O8:Eu3+, and CaAl2Si2O8:Dy3+, Eu3+ with a pure phase (CaAl2Si2O8) were synthesized in air. The X-ray diffraction patterns of the samples were measured and their crystal structures were elucidated. Under excitation at 350 nm, the yellow emission of CaAl2Si2O8:Dy3+ in the spectral range of 525–800 nm was observed due to the 4F9/2 → 6H15/2, 6H13/2, 6H11/2, and 6H9/2 transitions of Dy3+ ions. CaAl2Si2O8:Eu3+ showed red emission in the range of 550–720 nm because of the transitions 5D0 → 7F1, 7F2, 7F3, and 7F4 of Eu3+ ions when it was excited by 394 nm light. A tunable color emission of CaAl2Si2O8:Dy3+, Eu3+ from yellow to red was found when the ratio between Dy3+ and Eu3+ ions was changed. We investigated the concentration-dependent spectra and ensured the optimal Dy3+ and Eu3+ concentrations in host CaAl2Si2O8. The spectra of the samples manifested the energy transfer from Dy3+ to Eu3+ ions. The energy-level diagrams of Dy3+ and Eu3+ ions were used to analyze the luminous mechanism of the samples. The research results are beneficial to the development of other Dy3+ and Eu3+ co-doped luminescence materials.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2021
·
IF 3.599
Renping Cao,Wenhao Wang,Yuan Ren,Zuofu Hu,Xingchen Zhou,Yongchun Xu,Zhiyang Luo,Aihui Liang
In this work, we synthesize a series of Ba 2 La 2 ZnW 2 O 12 :Sm 3+ (BLZWO:Sm 3+ ) phosphors and research their crystal structure, morphology, and luminescence properties. The emission spectrum of host BLZWO with excitation at 370 nm can be observed in the range of 390–800 nm because of the W 6+ - O 2− transition in [WO 6 ] group. BLZWO:Sm 3+ phosphor with excitation at 370 nm emits yellow light with the emission spectrum in the range of 390–800 nm due to the W 6+ - O 2− transition in [WO 6 ] group and the 4 G 5/2 → 6 H 9/2 transition of Sm 3+ ion. BLZWO:Sm 3+ phosphor excited at 408 nm emits red light and its emission spectrum in the range of 550–740 nm includes four narrow emission bands (550–580 nm, 580–625 nm, 625–685 nm, and 685–740 nm), which are derived from the 4 G 5/2 → 6 H 5/2 , 6 H 7/2 , 6 H 9/2 , and 6 H 11/2 transitions of Sm 3+ ion, respectively. We investigate the concentration-dependent excitation and emission spectra of samples. The lifetime of BLZWO:Sm 3+ phosphor under excitation 408 nm decreases from 799.6 μs to 686.7 μs with increasing Sm 3+ doping concentration. The energy transfer and luminous mechanism in BLZWO:Sm 3+ phosphor are explained.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2016
·
IF 2.653
Renping Cao,Ting Fu,Dedong Peng,Chunyan Cao,Wen Ruan,Xiaoguang Yu
Host SrSb 2 O 6 , SrSb 2 O 6 :Bi 3 + , SrSb 2 O 6 :Eu 3 + , and SrSb 2 O 6 :Eu 3 + , Bi 3 + phosphors are synthesized by solid state reaction method in air. Host SrSb 2 O 6 with excitation 254 nm shows weak green-yellow emission in the range of 320–780 nm due to Sb 5 + → O 2– transition. SrSb 2 O 6 :Bi 3 + phosphor with excitation 365 nm emits green light within the range 400–650 nm owing to the 3 P 1 → 1 S 0 transition of Bi 3 + ion. SrSb 2 O 6 :Eu 3 + phosphor with excitation 254 nm exhibits a systematically varied hue from green to orange-red light by increasing Eu 3 + concentration from 0 to 7 mol%, and that with excitation 394 nm only shows orange-red light. The optimal Eu 3 + concentration is ~ 4 mol% in SrSb 2 O 6 :Eu 3 + phosphor. SrSb 2 O 6 :Eu 3 + , Bi 3 + phosphor with excitation 254 and 394 nm emits orange-red light. Emission intensity of SrSb 2 O 6 :Eu 3 + phosphor may be enhanced > 2 times by co-doping Bi 3 + ion because of the fluxing agent and energy transfer roles of Bi 3 + ion in SrSb 2 O 6 :Eu 3 + , Bi 3 + phosphor. The luminous mechanism of SrSb 2 O 6 :Eu 3 + , Bi 3 + phosphor is analyzed and explained by the simplified energy level diagrams of Sb 2 O 6 2 − group, Bi 3 + and Eu 3 + ions, and energy transfer processes between them.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2023
·
IF 3.8
Renping Cao,Jingyi Lin,Bang Lan,Fangrui Cheng,Ting Chen,Lan Li,Ru Liu,Jing Wang
Na 3 Sc 2 (PO 4 ) 3 :R (R = Bi 3+ , Sm 3+ , and Sm 3+ /Bi 3+ ) are successfully synthesized in air atmosphere. The high-temperature solid-state reaction method is used in this work. The X-ray diffractometer patterns confirm that all samples have the single pure phase Na 3 Sc 2 (PO 4 ) 3 . Na 3 Sc 2 (PO 4 ) 3 :Bi 3+ displays blue emission because of the Bi 3+ - Sc 3+ metal-to-metal charge-transfer and the 3 P 1 → 1 S 0 transition of Bi 3+ . Na 3 Sc 2 (PO 4 ) 3 :Sm 3+ shows red-orange emission with four emission bands derived from the 4 G 5/2 → 6 H 5/2 (550 - 582 nm), 6 H 7/2 (582–625 nm), 6 H 9/2 (625–675 nm), and 6 H 11/2 (675–750 nm) transitions of Sm 3+ . The optimal Sm 3+ concentration in Na 3 Sc 2 (PO 4 ) 3 :Sm 3+ is ∼8mol%. An adjustable color emission from blue to red-orange of Na 3 Sc 2 (PO 4 ) 3 :Sm 3+ , Bi 3+ with excitation at 345 nm can be observed when the ratio between Sm 3+ and Bi 3+ ions is changed. Na 3 Sc 2 (PO 4 ) 3 :Sm 3+ , Bi 3+ emits red–orange light under excitation 406 nm. The optimal Bi 3+ concentration in Na 3 Sc 2 (PO 4 ) 3 :8mol%Sm 3+ , Bi 3+ is ∼ 6mol%. The energy transfer from Bi 3+ to Sm 3+ in Na 3 Sc 2 (PO 4 ) 3 :Sm 3+ , Bi 3+ is verified by the spectral properties of samples. We discuss the influences of Bi 3+ or Sm 3+ concentration on luminescence properties of samples and analyze their luminous mechanism by energy level diagram. The experimental results of paper are useful for the research of new Bi 3+ and Sm 3+ doped phosphors.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
OPTIK
·
2016
·
IF 0.742
Renping Cao,Xiangfeng Ceng,Jijun Huang,Chunyan Cao,Pengjie Tang,Hui Ao,Xiaoguang Yu
Novel Ca 0.2 Zr 0.8 O 1.8 :Eu 3+ phosphor is synthesized by high-temperature solid-state reaction method in air. Host Ca 0.2 Zr 0.8 O 1.8 with excitation 310 nm shows deep-blue broadband emission within the range 340–500 nm owing to the Zr 4+ → O 2− transition in [ZrO 8 ] group. Ca 0.2 Zr 0.8 O 1.8 :Eu 3+ phosphor with excitation 263 and 394 nm emits reddish-orange light owing to the 5 D 0 → 7 F J ( J = 1, 2, 3, and 4) transitions of Eu 3+ ion, and that with excitation 310 nm shows a systematically varied hue from deep-blue to reddish-orange by changing Eu 3+ ion concentration . Tunable emission and energy transfer are confirmed via spectral properties. The optimal Eu 3+ concentration is ∼5 mol% in Ca 0.2 Zr 0.8 O 1.8 :Eu 3+ phosphor and the corresponding fluorescence lifetime is ∼1.994 ms. The luminous mechanism is analyzed and explained by the simplified energy level diagrams of [ZrO 8 ] group and Eu 3+ ion in Ca 0.2 Zr 0.8 O 1.8 :Eu 3+ phosphor.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Chemistry
·
2025
·
IF 6.7
Pengyu Zhang,Yiping Du,Chen Li,Lin Ma,Jiawen Xiao,Zhengguang Yan
Low-dimensional hybrid Cu(I)-based halide materials are a new class of materials with low toxicity and excellent photoluminescent properties. In this work, five novel single crystals of [1,4-BDA]Cu 2 X 4 (X = Cl, Br, I) (1,4-BDA: 1,4-butanediamine) and [1,3-PDA] 2 Cu 3 X 7 (X = Cl, Br) (1,3-propanediamine) were obtained using a solvent evaporation method. The [1,4-BDA]Cu 2 X 4 (X = Cl, Br, I) crystals all have 1D structures, while the [1,3-PDA] 2 Cu 3 X 7 (X = Cl, Br) crystals have 0D structures. All five single crystals exhibit broadband blue emissions under 254 nm UV excitation at room temperature. Interestingly, both crystals show a gradual blueshift of the emission peaks with increasing halogen atomic mass, realizing tunable emission from the dark blue to sky blue range. The energy transfer process of the [1,4-BDA]Cu 2 Br 4 single crystal was studied using temperature-dependent photoluminescence spectroscopy. Combined with density-functional theory calculations, the reason for the shift of the PL emission peaks is explained. Notably, by altering the chemical composition, different photoluminescent halide materials can be obtained. Providing insight into the discovery of new low-toxicity, low-cost Cu(I)-based halide materials.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Rongbo Ma,Weichao Huang,Xinyong Gong,Chaoyong Deng
Photochromic luminescent materials have attracted much attention as a promising field in information encryption and anti-counterfeiting applications. Herein, a series of color-tunable with reversible photochromic BaSrY 4 O 8 : Bi 3+ /Eu 3+ phosphors were synthesized by the solid-state reaction method. The emission of BaSrY 4 O 8 : Bi 3+ , Eu 3+ phosphor exhibits tunable emission colors depending on the excitation wavelength or the Eu 3+ concentration. The effective energy transfers from Bi 3+ to Eu 3+ were observed, and the energy transfer mechanism was explained. Additionally, the color of the phosphor shows a reversible change from white to brown when exposed to different light stimuli (365 nm and 450 nm light). The reversible photochromic effect can be quantified by analyzing the changes in the emission spectra and diffuse reflectance spectra. The photochromic mechanism was investigated. Furthermore, an advanced anti-counterfeiting and encryption application was designed by combining multicolor luminescence with reversible photochromic under different light stimuli. The prepared anti-counterfeit pattern exhibits rapid luminescence modulation and noticeable multimodal changes in bright and dark fields. These results suggested that the BaSrY 4 O 8 : Bi 3+ /Eu 3+ phosphors are promising applications in information encryption and anti-counterfeiting.
研究领域:
材料科学
·
光学
·
信息科学
✓ 已验证
DOI
高影响因子
Physica Status Solidi-Rapid Research Letters
·
2021
·Vol. 16
·期 2
·2100517
·
IF 2.821
Feng Zhao,Qingfeng Bian,Yunting Chu,Yi Zhang,Qianyun Zhao,Jingchang Sun,Chengren Li
To date, it is still a challenging topic to achieve a wide tunable emission from the same sample under the excitation of a single pump source. Herein, a new sort of nanophosphor NaYO 2 :Er 3+ /Yb 3+ is prepared and characterized. In particular, the wide tunable range crossing red–yellow–green–white regions can be realized only by modulating the power density of the 980 nm semiconductor laser. The mechanism of emitting white light is discussed, and two formulae for quantitatively defining the fluorescent material's tuning ability are also offered. At the same time, the nanophosphor on hand possesses a high degree of reversibility. The nanophosphor presents comprehensive application prospects in information security, anticounterfeiting, display, and other fields.
研究领域:
材料科学
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光学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2019
·
IF 4.85
Xiao Zhou,Hongwei Wang,Sha Jiang,Guotao Xiang,Xiao Tang,Xiaobing Luo,Li Li,Xianju Zhou
A series of lanthanide organic complexes, namely, [Ln2PDC3(H2O)3]H2O (Ln = Eu, Tb, EuxTb2–x, H2PDC: pyridine-3,5-dicarboxylic acid), were synthesized via hydrothermal method. Eu-PDC was characterized by single-crystal X-ray diffraction. The powder X-ray diffraction, Fourier transform infrared spectra, and thermogravimetric analysis illustrate that Eu-PDC, Tb-PDC, and EuxTb2–x-PDC complexes are isostructural. All the complexes exhibit strong emission even though water molecules coordinated in the structure. Tunable emission color from green, yellow to red is realized by adjusting the Eu/Tb ratio in mixed EuxTb2–x-PDC complexes. Energy transfer from Tb3+ to Eu3+ is discussed in detail via fluorescence decay and time resolution spectra. The detailed energy transfer process sees that the emitting color of Eu0.15Tb1.85-PDC shifts from green to orange in a time interval of 153–790 μs. In addition, temperature-dependent emission of the Eu0.05Tb1.95-PDC complex indicates that it is a potential solid state material for a luminescence thermometer in the range of 293–333 K. The temperature resolution is less than 0.16 K. The optical properties of the EuTb-PDC complex indicate that it is a multifunctional luminescent material with promising applications in temperature sensing, time resolution imaging, lighting, and displaying.
研究领域:
无机化学
·
材料科学
·
光学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Physical Chemistry C
·
2021
·
IF 4.126
Xian Wu,Quan Zhou,Haodi Wu,Xinyuan Du,Guangda Niu,Guijie Liang,Qingsong Hu,Jiawen Xiao
There is a growing demand for novel scintillators with applications in security inspection, medical radiography, X-ray astronomy, and so on. However, the conventional all-inorganic scintillators encounter typical bottlenecks such as high cost, fixed emission band, and long decay time, etc. The recently developed halide perovskite scintillators are subjected to defects-induced thermal quenching and moisture instability. Herein, we developed a series of zero-dimensional perovskite single crystals (SCs) as scintillators with tunable emission through a simple low-temperature solution method. The emission wavelength of Cs4PbBr6–xClx SCs can be tuned from ∼528 to ∼433 nm by varying the Br/Cl ratio. In addition, the photoluminescent lifetimes can be shortened to 0.62 ns with the increase of Cl–. The scintillating properties of our SCs were studied, and the X-ray imaging results showed a high spatial resolution of 4.0 line-pairs per millimeter. Also, the obtained crystals exhibit impressive stability under ambient conditions. This work provides a new strategy to design and synthesize perovskite scintillators, which hold potential in promoting fast scintillators performance.
研究领域:
材料科学
·
光学
·
医学影像
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）