DALTON TRANSACTIONS
·
2021
·Vol. 51
·期 1
·257-263
·
IF 4.39
Qi Gu,Wenqian Wang,Hao Lu,Xi Chen,Shuaihua Wang,Shaofan Wu
Lanthanide–organic frameworks (LnOFs) have been brought into focus due to their unique structure–function relevance, and have shown good application prospects in many fields. According to the characteristics of scintillating materials, we synthesized two isomorphic LnOFs with the lanthanides terbium and europium as emission centers: Tb(bmb)3·H2O (LnOF-1) and Eu(bmb)3·H2O (LnOF-2). Tb3+ and Eu3+ were used as X-ray absorption centers, and large conjugated organic ligands were used as energy transfer bridges, which can effectively convert X-rays into visible light. LnOF-1 and LnOF-2 show good X-ray scintillation performance and anti-radiation stability. At the same time, we prepared a LnOF-1 mixed matrix scintillating film by the physical deposition method for X-ray imaging experiments, and its spatial resolution can reach 9.5 lp mm−1@MTF20%. The excellent imaging application effect prospect makes the lanthanide–organic frameworks show development potential in the field of scintillating materials.
研究领域:
材料科学
·
放射学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
ZhuoXing Wen,LianJie Li,WenJun Huang,SunYueZi Chen,Lei Lei,Tao Pang,Hai Guo
Here, we successfully prepared Tb 3+ -activated borogermanate glass by the traditional melt-quenching method. The optical and scintillating properties were investigated by using photoluminescence , transmission spectra, luminescence decay curves and X-ray excited luminescence. High content of Gd 2 O 3 was added into borogermanate glass to improve the density of glass (about 5.52 g/cm 3 ), and thus to enhance the radiation stopping power. Al powder was introduced into the composition as reducing agent. Due to incorporation of Al powder, the internal quantum efficiency of glass increases from 18.8% to 56.3%. Meanwhile, the integrated intensity of X-ray excited luminescence of glass promotes from 29.8% to 46.6% compared to Bi 4 Ge 3 O 12 scintillating crystal. All above results declare that Al powder as reducing agent can strengthen the optical and scintillating properties of Tb 3+ -activated borogermanate glass.
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
Ziheng Zhao,Xitao Li,Lingling Xie,Bingkun Chen,Ting Jiang,Jie Cao,Fa Zhang,Min Wang,Yafeng Wu,Hong Zheng,Fang Zhang,Yongtian Wang
Lead-free metal halide perovskites have attracted much attention owing to their non-toxicity and excellent optical properties . Especially, cesium copper iodide compounds exhibit advantages of good environmental stability and low cost, rendering promising potential applications in optoelectronic devices field. Here, we use an anti-solvent assisted crystallization method to realize phase control syntheses of CsCu 2 I 3 and Cs 3 Cu 2 I 5 by varying the concentrations of precursor solution. Using high precursor solution concentrations, Cs 3 Cu 2 I 5 with strong blue emission peak at 440 nm is prepared. While the CsCu 2 I 3 is fabricated at low precursor solution concentrations, with the yellow emission peak of 580 nm. Furthermore, the UV-pumped light-emitting diodes (UV-LEDs) are realized by adopting CsCu 2 I 3 and Cs 3 Cu 2 I 5 powders as phosphors, and we also obverse the scintillation characteristic of the cesium copper iodide powders, showing potential applications for lighting and X-ray detection devices.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
MODERN PHYSICS LETTERS B
·
2017
·
IF 0.617
Peiju Hu,Wei Zhang,Zhengfa Hu,Zuyong Feng,Lun Ma,Xiuping Zhang,Xia Sheng,Li Luo,Yinhai Wang
Dy-Bi co-doped yttrium tungstate crystal materials were synthesized by high temperature solid-state method. To reveal the photoluminescence features and properties of the samples, some measurements have been taken. It turned out that different Bi 3 + concentrations play obvious influence in emission performance, and show visible light emission under ultraviolet light excitation. Besides, the effect of temperature on phase structure of samples has also been studied here. Superhigh X-ray luminescence of the phosphors exhibited the promising application in the field of high energy detection. The X-ray irradiation crystal resistance stability of the phosphors has also been investigated through the subsequent testing of XRD and spectra.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2023
·
IF 8.6
Dong-Yang Li,Jia-Hang Wu,Xing-Yu Wang,Xiao-Yang Zhang,Cheng-Yang Yue,Xiao-Wu Lei
Multifunctional stimuli-responsive luminescent and optical switching is extremely crucial for wide advanced photonic applications, but it remains a challenging objective for halide perovskites. Herein, by performing single-crystal to single-crystal (SC–SC) transformation as a dynamic molecular strategy, we realized a reversible triple-mode photoluminescence, radioluminescence (PL and RL), and nonlinear optical (NLO) switching in a pair of zero-dimensional (0D) hybrid cuprous halides of [ETPP]2Cu4Br6 and [ETPP]CuBr2. Specifically, [ETPP]2Cu4Br6 and [ETPP]CuBr2 display highly efficient yellow and green light emissions under UV light excitation with the highest quantum yield of up to near unity. Simultaneously, identical radioluminescence can also be activated by using X-ray as RL with a light yield of up to 57,974 photons MeV–1, surpassing most of the previously reported hybrid cuprous halides. Most remarkably, reversible SC–SC transformation between them can be realized in an ethanol impregnation-heating process, which provides reversible PL/RL transitions in two light-emitting states. Additionally, this process is also accompanied by transition between the centrosymmetric NLO-inactive [ETPP]2Cu4Br6 and noncentrosymmetric NLO-active [ETPP]CuBr2 through reversible second harmonic generation (SHG) “silent-active” switching. To the best of our knowledge, this is the first reported triple-mode reversible PL, RL, and SHG switching in halide perovskite chemistry, which can realize advanced applications in data storage, information security, optical logic gates, etc.
研究领域:
材料科学
·
光子学
·
光电
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 38
·14296-14305
·
IF 8.067
Dongxun Chen,Yanjie Liang,Shihai Miao,Xihui Shan,Xiaojia Wang,Weili Wang,Yuhai Zhang,Jianqiang Bi,Dongqi Tang
Bismuth-based fluoride nanocrystalline materials are becoming an emerging class of host matrixes for luminescent lanthanide ions (Ln3+). However, the synthesis of morphology-controlled bismuth-based fluoride nanocrystals still remains a challenging work. Herein we report an aqueous-phase self-surfactant route to synthesize the K0.3Bi0.7F2.4 (KBF) nanocrystalline particles with controllable morphologies in 1 minute at room temperature. It is found that the morphology of the prepared sample is strongly dependent on the contents of ammonium bismuth citrate and KF in the reaction system, leading to monodisperse nanocrystalline particles with uniform cubic, polyhedral and spherical shapes. By introducing Ln3+ (Ln = Tb, Eu) ions into the KBF lattice, the resultant KBF:Tb and KBF:Eu nanoscintillators exhibit fascinating ability to emit intense green and orange-red luminescence upon X-ray excitation. The detection limits of X-ray dose rate are determined to be 1.24 μGy s−1 for KBF:Tb and 0.77 μGy s−1 for KBF:Eu, respectively, which are both lower than the dose rate required for X-ray diagnostics (5.5 μGy s−1). Flexible and large-area scintillator films by incorporating the KBF:Tb and KBF:Eu nanoscintillators into PDMS demonstrate great potential for X-ray imaging applications, which enables them to be promising alternatives for single-crystal and ceramic scintillators.
研究领域:
材料科学
·
纳米技术
·
医学影像
✓ 已验证
DOI
高影响因子
Light-Science & Applications
·
2025
·Vol. 14
·期 1
·1-11
·
IF 23.4
Suo Hao,Wang Nan,Zhang Yu,Zhang Xin,Xiang Jinmeng,Wang Xiaojia,Xing Guansheng,Guo Dongxu,Chang Jiwen,Wang Yu,Li Panlai,Wang Zhijun,Zhang Yuhai,Chen Bing,Li Shuzhou,Guo Chongfeng,Wang Feng
Low-dimensional lead-free metal halide perovskites are highly attractive for cutting-edge optoelectronic applications. Herein, we report a class of scandium-based double perovskite crystals comprising antimony dopants that can generate multiexcitonic emissions in the ultraviolet, blue, and yellow spectral regions. Owing to the zero-dimensional nature of the crystal lattice that minimizes energy crosstalk, different excitonic states in the crystals can be selectively excited by ultraviolet light, X-ray irradiation, and mechanical action, enabling dynamic control of steady/transient-state spectral features by modulating the excitation modes. Remarkably, the transparent crystal exhibits highly efficient white photoluminescence (quantum yield >97%), X-ray excited blue emission with long afterglow (duration >9 h), and high-brightness self-reproducible violet-blue mechanoluminescence. These findings reveal the exceptional capability of low-dimensional perovskite crystals for integrating various excitonic luminescence, offering exciting opportunities for multi-level data encryption and all-in-one authentication technologies.
研究领域:
材料科学
·
光学
·
光电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）