Journal of Materials Chemistry C
·
2024
·
IF 5.7
Deyuan Yang,Ruirui Cui,Chaoyong Deng
Recently, the splendid strategy of co-doping ns2 electron configuration ions with rare-earth ions in all-inorganic lead-free halide double perovskites has been proposed to overcome the weak absorption cross-section of the f–f transition of rare-earth ions and achieve efficient white emission. But few of them can really provide effective red emission in lead-free halide double perovskites, despite the wide variety of rare-earth ions, and lead-free halide double perovskites with co-doping rare-earth ions and doping ns2 electron configuration ions usually exhibit an unsatisfactory color rendering index due to the narrow characteristic emission peaks of rare-earth ions. To address this issue, Mn2+ ions with red wide peak emission were introduced into Cs2NaScCl6 simultaneously with Tb3+ ions and Sb3+ ions in this work. The white light emission was observed in Cs2NaScCl6:0.01Sb3+,0.12Tb3+,0.07Mn2+ under 336 nm excitation because the presence of energy transfer from Sb3+ ions to Mn2+ and Tb3+ ions enhances fluorescence performances of Mn2+ and Tb2+. The temperature-dependent spectrum of Cs2NaScCl6:0.01Sb3+,0.12Tb3+,0.07Mn2+ shows that it exhibits a stable white emission in the temperature range of 298–398 K, and it's emission intensity at 398 K only decreases by less than 18% of the initial intensity (at 298 K). Excitingly, WLED devices with a quite high color rendering index of 93.6, which is one of the best in lead-free halide double perovskites, and nearly standard white light CIE coordinates of (0.3425, 0.3435), have been fabricated by using Cs2NaScCl6:0.01Sb3+,0.12Tb3+,0.07Mn2+ and a 340 nm LED chip and can maintain a good white color stability at different working times and currents. These results indicate that Cs2NaScCl6:Sb3+,Tb3+,Mn2+ is an outstanding candidate for WLED applications.
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 ELECTRONIC MATERIALS
·
2020
·Vol. 49
·期 6
·3869-3876
·
IF 1.774
Cao Renping,Jiao Yuming,Wang Xuantian,Ouyang Xun,Chen Ting,Wan Huijun,Fan Ting,Xie Shikun
In this work, CaTiSiO 5 :Ce 3+ and CaTiSiO 5 :Ce 3+ , Mn 2+ phosphors are prepared in air via the high-temperature solid-state reaction method. The crystal structure, phase purity, and luminescence properties of the samples are investigated. CaTiSiO 5 :Ce 3+ phosphor under excitation at 320 nm emits mazarine light with chromaticity coordinates (0.1693, 0.0053) and optimal Ce 3+ doping concentration of ∼ 6 mol.%. CaTiSiO 5 :6%Ce 3+ , Mn 2+ phosphor with excitation at 320 nm shows a tunable color emission from yellow to red-orange with increasing Mn 2+ concentration from 1 mol.% to 8 mol.%, the corresponding chromaticity coordinates are changed from (0.4302, 0.4507) to (0.5475, 0.3916), and the corresponding lifetimes decrease from 34.22 ns to 16.33 ns. The energy transfer (ET) process between Ce 3+ and Mn 2+ ions is confirmed by the spectral properties and lifetimes of CaTiSiO 5 :6%Ce 3+ , Mn 2+ phosphor, with ET efficiency reaching ∼ 52.28%. The luminescence mechanism is explained by the energy level diagrams of Ce 3+ and Mn 2+ ions. The experimental results are of benefit for research and improving the tunable emission of other phosphors.
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Junwei Zhang,Hui Lin,Wenhui Lou,Ruijin Hong,Zhaoxia Han,Dawei Zhang
Photo-stimulated luminescence materials have shown significant potential in the field of information storage, but they still face critical challenges in the regulation of trap levels. Herein, Ba 0.75 Al 11 O 17.25 :Eu 2+ fluorescent ceramics with abundant deep traps (1.24 eV) were reported via selective Mn 2+ co-doping. This material exhibits a homogeneous and dense crystalline structure, and its narrow-band emission at 514 nm is attributed to the energy transfer of Eu-Mn. Thermoluminescence curves, X-ray photoelectron spectroscopy and electron paramagnetic resonance spectra confirm that the trap levels primarily arise from oxygen vacancies and Reidinger defects, and Mn 2+ doping suppresses the formation of shallow traps through charge compensation mechanism. Significantly, information writing and reading in the ceramic medium were achieve using 254 nm UV light and 980 nm NIR light or thermal stimulation. The excellent photo-stimulated luminescence properties and high read-write stability of Ba 0.75 Al 11 O 17.25 :Eu 2+ , Mn 2+ are expected to accelerate the development of the next generation of optical storage technology.
研究领域:
材料科学
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光学工程
✓ 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
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DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Xiaoman Li,Ruijin Fan,Pengfei Zhai,Xinyu Liu,Huijun Liu,Shitong Xu,Rongfei Wei,Hai Guo
The demands for white-light-emitting materials are becoming more and more rigorous. In this work, a novel kind of Sn 2+ /Mn 2+ doped phosphate aluminum calcium glass was fabricated by a traditional melt-quenching technique. Broadband excitation and emission of Sn 2+ ions were detected in Sn 2+ single-doped glass samples. By the modulation of excitation wavelength, tunable broadband cyan-blue light emissions of Sn 2+ were also realized. Combined with the red light emitting of Mn 2+ ion, a nearly white light with a good chromaticity coordinate (0.339, 0.298) and a relatively low correlated color temperature (CCT) of 5107 K were obtained in Sn 2+ /Mn 2+ codoped glasses due to the energy transfer process from Sn 2+ to Mn 2+ ions. In addition, after two cycles of heating and cooling treatment, the emission intensity of Sn 2+ doped glass sample remained 97.9% of the initial emission intensity at 300 K. All of these results reveal that these Sn 2+ /Mn 2+ doped aluminum calcium phosphate glasses have good resistance to thermal impacts and have prospects in white-light-emitting diodes (W-LEDs) fields.
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 11
·期 24
·8052-8061
·
IF 8.067
Binbin Su,Kai Han,Zhiguo Xia
Luminescent metal halides with a high photoluminescence quantum yield (PLQY), large Stokes shift and strong X-ray absorption capability have demonstrated prospects in high-energy radiation detection. Here, we report Mn2+-doped all-inorganic metal halide Cs2ZnBr4 as an X-ray imaging scintillator. The as-prepared Cs2ZnBr4:Mn2+ shows two emission bands peaking at 526 and 655 nm, respectively, with a PLQY of up to 58.8%. It is found that the dual emissions belong to the spin-forbidden d–d transition of Mn2+ ions in different coordination configurations, and the involved luminescence and evolution mechanisms have been analyzed. To investigate the scintillation properties, we successfully fabricated a homogeneous thin film scintillation screen containing Cs2ZnBr4:25%Mn2+, which shows good X-ray scintillation performance with a light yield of about 15 600 photons per MeV and a low detection limit of 1.16 μGyair s−1. Moreover, the flexible and large-area scintillation screens exhibit good X-ray imaging performance with a spatial resolution of 5.06 lp mm−1 and excellent stability under continuous X-ray irradiation.
研究领域:
材料科学
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光学
·
放射学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2016
·Vol. 4
·期 40
·9598-9607
·
IF 5.066
M. Wu,X. F. Jiang,E. H. Song,J. Su,Z. T. Chen,W. B. Dai,S. Ye,Q. Y. Zhang
Successful upconversion (UC) tuning from multi-bands to one single red band from Er3+ ions was realized in cubic perovskite ABF3:Yb3+/Er3+ (A = K, Cs; B = Zn, Cd) through Mn2+ doping. Based on UC emission spectra and decay kinetics of KZnF3:Yb3+/Er3+ with different Mn2+ contents, a bidirectional energy transfer process between Mn2+ and Er3+ ions was confirmed to explain the UC tuning mechanism. More importantly, we studied the influence of the Mn2+ energy level position on the UC properties for Er3+ in ABF3 hosts. Interestingly, great enhancement of green UC emissions was observed for Er3+ ions in KCdF3 and CsCdF3 hosts upon Mn2+ doping. Comparison of UC emissions and lifetimes of Er3+ ions in the three materials was carried out to probe the different UC processes in ABF3 (A = K, Cs; B = Zn, Cd) hosts. The different energy transfer mechanism between Mn2+ and Er3+, which is affected by the Mn2+ energy level position, was proposed to explain the UC difference in the three matrices. This research convincingly confirmed the occurrence of energy transfer between Er3+ and Mn2+ ions and provided deep insights into the importance of the Mn2+ energy level position in tuning the UC properties of Er3+ in diverse hosts, while allowing us to better control the UC properties through Mn2+ doping.
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
JOURNAL OF MATERIALS SCIENCE
·
2021
·Vol. 56
·期 13
·8048-8059
·
IF 4.22
Chen Luming,Yang Weiyou,Fu Hui,Liu Wenna,Shao Gang,Tang Bin,Zheng Jinju
Abstract Lead-free double perovskites are emerging as an excellent candidate material for optoelectronic devices, owing to their unique properties such as widely adjustable band gap and markedly lower toxicity than the lead-halide counterparts. In this work, a series of Mn 2+ -doped Cs 2 NaInCl 6 (Mn 2+ :Cs 2 NaInCl 6 ) DP crystals with tailored Mn 2+ -doping concentrations are synthesized. The effects of the reaction temperatures and Mn/(In + Na) ratios in the raw materials on the Mn 2+ doping concentrations and their photoluminescence (PL) properties are investigated systematically. The resultant DP crystals exhibit well-resolved Mn 2+ 4 T 1 → 6 A 1 d − d emission with an optimal PL quantum yield of 16% and an extremely long excited state lifetime up to ~ 17 ms, which is the longest one of Mn 2+ emission among those of Mn 2+ -doped II–VI semiconductors or perovskite materials ever reported. Furthermore, the temperature-dependent PL and PL decay are studied in the temperatures range from 120 to 480 K. The decay lifetime decreased monotonously with the rise in temperatures, while the PL intensity gradually reaches a maximum and then keeps nearly constant, followed by a sharp decrease. Such abnormal phenomenon is mainly attributed to the combined effect of intrinsic property of octahedrally coordinated Mn 2+ in perovskite lattice and enhanced electron–phonon coupling at elevated temperature. Graphical abstract
研究领域:
材料科学
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光学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Ruoyu Fu,Ying Fu,Feng Zhang,Liuhan Yi,Chao Li,Mengzhu Long
Due to its relatively low cost and remote detection characteristics, optical temperature sensing technology based on FIR has received widespread attention. At present, there is a lack of theoretical guidance on how to purposefully improve or guide the development of high-performance temperature sensing materials. Herein, the structure of a novel material K 7 MgSc 2 B 15 O 30 has been confirmed by the XRD analysis. Furthermore, the effect of Zn on the crystal structure and the photoluminescence (PL) properties of K 7 MgSc 2 B 15 O 30 :Mn 2+ has been studied. The PL spectra analysis of a series of Mn 2+ doped K 7 MgSc 2 B 15 O 30 luminescence materials indicates that two kinds of Mn 2+ emitting centers (Mn(1) and Mn(2)) exist due to the two possible substitution sites Mg 2+ and Sc 3+ . With the increasing of Zn 2+ , the intensity ratio of Mn(2) to Mn(1) improves from 1.01 to 1.88 at room temperature. Especially, the thermal stability of Mn(1) and Mn(2) gradually decrease with the increasing of Zn 2+ contents, which can be due to the lengthening of Zn/Mg–O bonds and the lattice distortion of ScO 6 , respectively. Finally, their temperature sensing sensitivity has been enhanced by the doping of Zn 2+ , which has a close relation to the different effect of the thermal stability of Mn(1) and Mn(2). This work is expected to provide new ideas for the development of high-performance temperature sensing materials based on FIR, and is helpful to understand the relationship between the crystal structure and luminescence properties.
研究领域:
材料科学
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光学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Yan Gao,Yao Cheng,Feng Huang,Hang Lin,Ju Xu,Yuansheng Wang
In this work, a new type of luminescent temperature sensor based on the Sn 2+ →Mn 2+ resonance energy transfer is designed, which shows great potential in high temperature optical thermometry. Using the micro-sized Sn 2+ /Mn 2+ :α-Sr 2 P 2 O 7 phosphor fabricated by carbon reduction method as optical thermometer, the sensitivity in the temperature range of 423 K–623 K is well superior to that for the other micro/nano luminescent temperature sensing materials reported previously, and the maximal absolute sensitivity reaches as high as 0.027 K −1 at 623 K. Analyses of the temperature-dependent photoluminescence spectra and configurational coordinate diagrams for Sn 2+ :α-Sr 2 P 2 O 7 and Mn 2+ :α-Sr 2 P 2 O 7 indicate that the temperature-sensitive variation in fluorescence intensity ratio of Sn 2+ to Mn 2+ is originated from the difference in thermal quenching activation energy for 3 P J (J = 0,1) levels of Sn 2+ (4053 cm −1 ) and 4 T 1 level of Mn 2+ (2464 cm −1 ). These results may provide useful inspiration for building highly sensitive self-referencing optical thermometers based on energy transfer induced sensitized luminescence.
研究领域:
材料科学
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光学工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2024
·Vol. 130
·期 6
·1-10
·
IF 2.5
He Yu,Li Xin,Guo Yangyang,Mao Huibing,Chen Ye,Wang Jiqing
The ZnS: Ho 3+ , Yb 3+ , Mn 2+ nanomaterials fabricated by the co-precipitation method have the zinc-blende structure with the crystallite size about 90 ∼ 100 nm. The X-ray diffraction (XRD), the scanning electron microscope (SEM) and the transmission electron microscope (TEM) characterizations confirm that the doping of the Mn 2+ has less effect on the structure of the ZnS: Ho 3+ , Yb 3+ , Mn 2+ nanomaterials. With the excitation of a 978 nm laser, the upconversion (UC) emissions of the ZnS: Ho 3+ , Yb 3+ , Mn 2+ nanomaterials include two emission bands located at 551 and 664 nm, which correspond to the transitions 5 F 4 ( 5 S 2 )→ 5 I 8 and 5 F 5 → 5 I 8 of the Ho 3+ ions. The UC emission characterization confirms that the UC emission of the ZnS: Ho 3+ , Yb 3+ nanomaterials can be modulated by the doping of the Mn 2+ ions, the increase of the incident laser power and the change of the laser pulse-width. The red emission of the ZnS: Ho 3+ , Yb 3+ nanomaterials particle will increase significantly with the incorporation of the Mn 2+ ions. The incident laser power and the laser pulse-width also can modulate the intensity ratio G / R of the green to the red. With the increase of the incident laser power, the emission intensity ratio G / R will also increase. With the increase of laser pulse-width from 0.2 to 0.8 ms, the above intensity ratio G/R will decrease significantly. The modulation between the green and red emission is due to the energy transfer from the 5 F 4 ( 5 S 2 ) state to the 5 F 5 state of the Ho 3+ ions through the state 4 T 1 of the Mn 2+ ions.
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 Materials Chemistry C
·
2019
·Vol. 7
·期 26
·8070-8078
·
IF 6.641
Yu Zhou,Yun-Ling Yang,Yu-Ting Fan,Woochul Yang,Wei-Bin Zhang,Jian-Feng Hu,Zhi-Jun Zhang,Jing-Tai Zhao
A series of novel red emitting Mn2+-activated SrZnSO phosphors were successfully synthesized by solid-state reaction at high temperature. The photoluminescence (PL) and mechanoluminescence (ML) properties of these Mn2+-activated SrZnSO phosphors with different Mn2+ concentrations were investigated. With increasing the concentration of Mn2+ from x = 0 to 0.04, the unit cell volume increased from 153.82 to 154.19 Å3 while the optical band gap decreased from 3.74 to 3.43 eV. The site occupation of Mn2+ in the host lattice was demonstrated by Rietveld refinement, the electron paramagnetic resonance (EPR) spectrum, and the spectroscopic properties. A broad band emission peak at 603 nm of SrZn1−xMnxSO (0.001 ≤ x ≤ 0.04) with an excitation wavelength of 318 nm was attributed to electronic transitions of Mn2+ from the 4T1(4G) level to the 6A1(6S) level. The lifetime of SrZn1−xMnxSO (0.001 ≤ x ≤ 0.04) decreased monotonously from 2.97 to 0.82 ms with increasing Mn2+ concentration. In particular, intense emission of red light from SrZn1−xMnxSO (0.001 ≤ x ≤ 0.04) under compressive load could be observed even with the naked eye, indicating that SrZn1−xMnxSO could be used for stress sensors or stress imaging. There was a linear correlation between the ML intensity and external load in SrZn1−xMnxSO, and the ML intensity could be recovered under UV light irradiation. Considering its advantages of non-destruction, reproducibility, and high ML intensity, SrZn1−xMnxSO might be useful for non-destructive detection of stress.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
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