ACS Applied Optical Materials
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2025
·
IF 3.8
Zhen Bao,Kai Zhao,Zhanpeng Wu,Qi Liu
Metal halide perovskite luminescent materials have been recognized as potential materials due to their excellent optical characteristics. However, its poor stability and the environment-friendly request make it urgent to develop a stable nontoxic material. Herein, thermally stable green emission Cs3MnBr5 crystals have been synthesized by a simple water evaporation method, which did not use any organic solvent or ligand. These Cs3MnBr5 crystals exhibit a stable photoluminescence (PL) curve and a linear trend under different excitation powers. Moreover, the optimized Cs3MnBr5 crystals can remain at 87% PL intensity after 10 heating loops, demonstrating good thermal stability. To check the potential for some special applications with a heating treatment, the Cs3MnBr5 crystals were designed to make a composite poly(lactic acid) (PLA) fluorescent fiber. Such fiber was successfully applied in a fused deposition modeling three-dimensional (3D) printing for 3D characters.
研究领域:
材料科学
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光学
·
环境友好材料
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DOI
高影响因子
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
·
2024
·
IF 2.7
Shiwei Xue,Huiling Ding,Zhenghao Xia,Hengbin Mao,Sibo Zhao,Hailong Wang,Bingbing Fan,Gang Shao,Hongliang Xu,Hongxia Lu
Light Emitting Diodes (LEDs) are the key to new generation displays. New semiconductor electron–hole recombination layer is the key to high-performance LEDs. Although all-inorganic quantum dot (QD) materials have the advantages of wide color gamut and narrow emission peaks, they face issues of toxicity of heavy metal ions and stability of QDs, the synthesis method is highly polluting and difficult to achieve industrial production. Thereby, lead-free all-inorganic phosphor with narrow FWHM needs to be explored. A new synthesis method is required to be investigated. All-inorganic Mn 2+ bromide (Cs 3 MnBr 5 ) is easy to synthesize and has low toxicity and superior luminescent properties. However, most synthesis methods rely on liquid-phase reaction systems and cannot achieve highly efficient synthesis. High-energy ball milling is an efficient method and has enormous potential for industrial production. In this paper, this method is used to synthesize Cs 3 MnBr 5 , and then Cs/Mn ratio, ball milling time, and ligand usage are studied. Furthermore, a new phase transformation of all-inorganic Mn 2+ bromide is discovered, and the mechanism of high-energy ball milling is interpreted combining with phase transformation process. This article brings a new method to synthesis of all-inorganic Mn 2+ bromide, explains the mechanism of ball milling, and expands the phase transformation of all-inorganic Mn 2+ bromide.
研究领域:
材料科学
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光学工程
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高影响因子
OPTICAL MATERIALS
·
2024
·
IF 3.8
Minghui Xu,Xuechun Yang,Xue Yang,Yuanhao Zhou,Guoxue Pan,Wanli Shang,Qingwen Tan,Zhan Xu,Guangda Niu,Jianjun Dong,Yukun Li,Zhenghua Yang,Feng Wang,He Feng,Jingtai Zhao,Kuan Ren,Qianli Li
Cesium manganese bromide metal halide has great potential in the field of X-ray imaging and anti-counterfeiting due to its excellent optoelectronic properties. Here, Cs 3 MnBr 5 was successfully prepared by a simple method. Uniquely a novel phenomenon based on H 2 O induced color change was discovered, Cs 3 MnBr 5 can recover from aqueous solution more than 10 times under heating, which can be used in fluorescent anti-counterfeiting applications. Furthermore, Cs 3 MnBr 5 @PDMS, prepared by the PDMS composite strategy, has been demonstrated to exhibit a stability that is 20 times greater than that of Cs 3 MnBr 5 . Simultaneously, the light yield of Cs 3 MnBr 5 is evaluated to be 21688 photons/MeV. Furthermore, it has been successfully applied in non-destructive detection and biological imaging and the spatial resolution can be restored to 10 lp mm −1 .
研究领域:
材料科学
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光电技术
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成像技术
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DOI
高影响因子
MOLECULES
·
2022
·Vol. 27
·期 23
·8259
·
IF 4.927
Ping Gao,Suwen Cheng,Jiaxin Liu,Junjie Li,Yanyan Guo,Zhengtao Deng,Tianshi Qin,Aifei Wang
Lead-free all-inorganic halide materials with different Mn2+-based crystal structures (Cs3MnBr5and CsMnBr3) were obtained using a convenient synthetic method. Cs3MnBr5had a bright green emission (522 nm), with a unique single-exponential lifetime (τavg= 236 µs) and a high photoluminescence quantum yield (82 ± 5%). A red emission was observed in the case of the CsMnBr3structure with a two-exponential fluorescence decay curve, and the lifetime was 1.418 µs (93%) and 18.328 µs (7%), respectively. By a judicious tuning of the synthetic conditions, a mixed phase of Cs3MnBr5/CsMnBr3was also produced that emitted white light, covering almost the entire visible spectrum. White-light-emitting diodes (WLEDs) with color coordinates (0.4269, 0.4955), a color temperature of (3773 K), and a color rendering index (68) were then fabricated using the as-prepared powder of mixed phases of Cs3MnBr5/CsMnBr3with a commercial UV LED chip (365 nm).Keywords:perovskite;Cs3MnBr5;manganese halide;phosphor;white LEDs
研究领域:
材料科学
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光学工程
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DOI
PubMed
高影响因子
CHEMICAL COMMUNICATIONS
·
2025
·
IF 4.2
Shu Li,Chuanhe Ma,Fushuai Li,Jinchun Jiang,Hailong Wang
In this study, we successfully synthesized Cs3MnBr5 films via vapor deposition for the first time using CsBr and MnBr2 raw materials. The optimal deposition temperature is 900°C, achieving a maximum PLQY of 63.5%, an emission peak at 520 nm and a FWHM of 31.9 nm. Additionally, TG and DSC measurements indicate the films possess excellent thermal stability up to 600°C.
研究领域:
材料科学
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光学
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PubMed
高影响因子
Journal of Materials Chemistry C
·
2019
·Vol. 7
·期 36
·11220-11226
·
IF 6.641
Binbin Su,Maxim S. Molokeev,Zhiguo Xia
To discover new narrow-band green-emitting phosphors is a challenge for backlighting light-emitting diodes (LEDs) used in liquid crystal displays (LCDs). The synthesis and optical properties of Cs3MnBr5 are demonstrated herein. The intrinsic Mn2+ luminescence without concentration quenching leads to intense green emission at 520 nm with narrow full width at half maximum of 42 nm and high photoluminescence quantum yield (PLQY) of 49% under the excitation at 460 nm. When a small amount of Zn2+ is introduced into Cs3MnBr5, the luminescence intensity decreases slightly. However, the thermal stability of Cs3MnBr5 is improved from 82% to 87% with the intensity values at 423 K compared to that at 298 K. The white LED device fabricated using Cs3Mn0.96Zn0.04Br5 (green) and K2SiF6:Mn4+ (red) phosphors with a blue LED chip exhibit a high luminous efficiency (107.76 lm W−1) and wide color gamut (101% National Television System Committee standard (NTSC) in Commission Internationale de L’Eclairage (CIE) 1931 color space), demonstrating its potential application in wide color gamut LCD backlights.
研究领域:
材料科学
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光学材料
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固态照明
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荧光粉化学
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LED技术
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高影响因子
ACS Applied Materials & Interfaces
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2024
·
IF 8.3
Yao Ju,Junfeng Qu,Yuru Duan,Yuge Feng,Cai Liang,Xiaoxi Zhou,Shuhong Xu,Chunlei Wang
The dynamic time-gating anticounterfeiting based on phosphorescence materials is the current hot topic of research. However, the short change time from nanosecond-level fluorescence false information to μs-level fluorescence correct information makes it easily deciphered just by turning off ultraviolet (UV) light. Herein, we first reported a new type of minute-level dynamic time-gating anticounterfeiting technology based on the ethanol-induced phase transition between the red-emitting CsMnBr3 crystals and green-emitting Cs3MnBr5 crystals. Our results show that the dissolution of MnBr2·2H2O from CsMnBr3 into ethanol triggers the phase transition. Moreover, the time of phase transition can be adjusted by mixing with different (3-aminopropyl)triethoxysilane (APTES) concentrations. By using CsMnBr3 and APTES-CsMnBr3 with different phase-transition times, the true information on “SEO” can be designed to show only in the conditions of specific stimulus (ethanol) and specific time range. Otherwise, the false information on “SEU” or “888” is shown. In comparison to previously reported dynamic time-gating anticounterfeiting technology based on phosphorescence materials, the current reported minute-level dynamic time-gating anticounterfeiting technology based on phase transition increased the difficulty of decryption. Moreover, the combination of nontoxic fluorescence materials and daily life available stimulus (ethanol) makes the current anticounterfeiting technology have great practical value.
研究领域:
材料科学
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光学工程
·
防伪技术
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DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Yingfang Tao,Haixing Zhao,Yan Xu,Deyin Wang,Yuhua Wang
A bright blue light excitable and narrow-band green-emitting phosphor Cs3MnBr5 has been synthesized by a facile microwave radiation method within 2 min. The influence of the matrix on its steady-state and transient-state luminescence properties is investigated by partial substitution of Br– ions by Cl– ions. The incorporation of Cl– ions in Cs3Mn(Br1–xClx)5 resulted in almost no change in the emission maxima of Mn2+, which is attributed to the synergistic effect of reduced covalency and increased crystal field strength caused by the replacement of Br– ions by Cl– ions. Meanwhile, the emission of Mn2+ decreases with the increasing Cl– content, which is caused by different thermal quenching of Mn2+ emission in the mixed Cl–/Br– coordination. Moreover, the incorporation of Cl– in Cs3Mn(Br1–xClx)5 was found to have different effects on the lifetime of Mn2+ at different temperatures, that is, at room temperature, the lifetime of Mn2+ decreases with the increasing Cl– content, while at liquid nitrogen temperature, the lifetime of Mn2+ increases upon increasing the Cl– content. The former is due to the different thermal quenching for different coordinations of Mn2+ with Cl– and Br–, while the latter is due to the weaker spin–orbit coupling of the Mn2+ ion caused by the interaction with the lighter Cl– ions, which makes the spin selection rule stricter and leads to a longer lifetime of Mn2+ consequently.
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高影响因子
ChemistrySelect
·
2025
·Vol. 10
·期 22
·e01437
·
IF 2
Xinge Sun,Shiwei Xue,Shuhan Zhu,Shuan Tang,Bingbing Fan,Mingliang Li,Gang Shao,Hailong Wang,Hongliang Xu,Hongxia Lu
Graphical A hybrid Mn 2+ -based metal halide (HMMH) was synthesized by high-energy ball milling (HEBM) for 25 minutes. A- and B-site co-doping of Cs 3 MnBr 5 are designed to form a more stable luminescent center and a hydrogen-bonding system. Poor luminescence intensity of Mn 2+ metal halides produced by HEBM and poor thermal stability of HMMHs were solved. Mn 2+ -based metal halides are important materials in the study of lead-free metal halides because of their high luminous efficiency, extensive availability of raw materials, and nontoxicity. At present, the synthesis of Cs₃MnBr₅ is impeded by the presence of intricate processes and environmental pollution, and the formation of crystals exhibits poor stability and low photoluminescence (PL) intensity. In this paper, an Mn 2+ -based hybrid metal halide was synthesized by co-doping Cs 3 MnBr 5 at the A and B sites. This synthesis was conducted under high-energy ball milling conditions for 25 min, resulting in a material with high photoluminescence intensity and temperature stability. In the new system, a hydrogen bond system and a [MnBr z (H 2 O) 4- z ] 2- z structure with high-binding energy are constructed. PL intensity of [Cs 0.85 (C 7 H 17 N 2 ) 0.15 ] 3 Mn 0.8 Mg 0.2 Br 5 · (6H 2 O) 0.2 is 302% of the initial value of Cs 3 MnBr 5 . The high-temperature thermal stability test of the samples was conducted using a platform constructed in our laboratory. The results demonstrated that the PL intensity after three rounds of thermal cycling is 374% of the initial value of Cs 3 MnBr 5 , which only decreases by 2.9% compared with the maximum. The solid-phase synthesis of Mn 2+ -based hybrid metal halides with excellent high-temperature luminescence stability has been realized, which shows a potential application prospect in the field of display.
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