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Journal of Rare Earths 2022年第9期40卷 1417-1423,I0003页

作者： Shanshan Peng Lin Liu Lizhen Wang Rui Rong Liang Song weixiong you Junpeng Shi Yun Zhang Faculty of Materials Metallurgy and ChemistryJiangxi University of Science and TechnologyGanzhou 341000China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials Xiamen Institute of Rare Earth MaterialsHaixi InstituteChinese Academy of SciencesXiamen 361021China University of Chinese Academy of Sciences Beijing 100049China Ganjiang Innovation Academy Chinese Academy of SciencesGanzhou 341000China

Recently,the ultraviolet(UV)persistent luminescence material(PLM)has attracted extensive ***,the design and development of new UV PLM and exploring their promising advanced application remain ***,we developed a new dopant-free self-activated UVA PLM,Zn_(2)Al_(2)SiO_(7),which could be applied in anti-counterfeiting ***_(2)Al_(2)SiO_(7)shows UVA persistent luminescence(PersL)peaking at 380 nm after 254 nm UV lamp *** of Yb^(3+),the UVA PersL intensity and time are raised obviously,and the UVA PersL time lasts more than 24 *** addition,Yb^(3+)-doped Zn_(2)Al_(2)SiO_(7)exhibits photostimulated properties with different light ***,we design anticounterfeiting pattern based on intensity and time resolution from PersL of Zn_(2)Al_(2)SiO_(7),showing its advantages in the anti-counterfeiting field.

关键词： Persistent luminescence Ultraviolet Anti-counterfeiting Self-activated Rare earths

Energy transfer and cross-relaxation induced multicolor upconversion emissions in Er^3+/Tm^3+/Yb^3+ doped double perovskite La2ZnTiO6 phosphors

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Journal of Rare Earths 2020年第2期38卷 130-138页

作者： youfusheng Wu Fengqin Lai Bin Liu Zhibiao Li Tongxiang Liang Yaochun Qiang Jianhui Huang Xinyu Ye weixiong you School of Material Science and Engineering Jiangxi University of Science and TechnologyGanzhou 341000China Key Laboratory of Rare Earth Luminescence Materials and Devices of Jiangxi Province Ganzhou 341000China School of Metallurgy and Chemistry Engineering Jiangxi University of Science and TechnologyGanzhou 341000China

Investigation on the bright and stable upconversion(UC)phosphors with multicolor emissions is fundamental and significant for the frontier applications of display and tempe rature *** re,dive rse emitting colors with blue,cyan and yellowish green,which are caused by the energy transfer and crossrelaxation processes,are obtained by altering Er^3+,Tm^3+and Yb^3+concentrations in Er3+singly,Er^3+-Tm^3+-Yb^3+co-and tri-doped double perovskite La2ZnTiO6(LZT)phosphors synthesized by a simple solid-state *** addition,excellent infrared emission at 801 nm located at"first biological windo w"is collected in Tm^3+-Yb^3+co-doped ***,the temperature sensing properties based on the thermally coupled levels((^2H11/2)/(^4S3/2))of Er3+ions were analyzed from 298 to 573 K of LZT:0.15 Er^3+/0.10 Yb^3+phosphor,demonstrating that the maximal sensitivity value is about56×10^-4 K^-1 at 448 *** these results imply that this kind of UC material has potential applications in display,bioimaging and optical device.

关键词： Upconversion Double perovskite Color-tunable Multiple applications Rare earths

Ce^(3+) doped BaLu_(2)Al_(2)Ga_(2)SiO_(12)——A novel blue-light excitable cyan-emitting phosphor with ultra-high quantum efficiency and excellent stability for full-spectrum white LEDs

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Journal of Rare Earths 2021年第9期39卷 1031-1039页

作者： Mingzhang Liang Jianfei Xu Yaochun Qiang Haojian Kang Lulu Zhang Jie Chen Chun Liu Xianbi Luo Ying Li Jingjing Zhang Liqing Ouyang weixiong you Xinyu Ye College of Rare Earths Jiangxi University of Science and TechnologyGanzhou 341000China Faculty of Materials Metallurgy and Chemistry Jiangxi University of Science and TechnologyGanzhou 341000China Key Laboratory of Rare Earth Luminescence Materials and Devices of Jiangxi Province Ganzhou 341000China

It is well known that cyan-emitting phosphors play a very important role in full-spectrum white LEDs.A large number of cyan-emitting phosphors have been reported in the past few years,however,most of them can only be effectively excited by near-ultraviolet *** are very few cyan-emitting phosphors that can be intensively excited by blue light(440 and 470 nm).Here,a novel blue-light excitable cyan-emitting phosphor BaLu_(1.95)Ce_(0.05)Al_(2)Ga_(2)SiO_(12)with excellent performance is *** cyan phosphor has a cubic structure in space group Ia3^(-)d with a=1.205379(3)nm,which can be easily obtained through a solid-state reaction *** emission peak of the cyan phosphor is located at 500 nm and its internal quantum efficiency is as high as 90.01%when excited at 455 nm at 25℃.The cyan phosphor exhibits superior resistance against thermal quenching of luminescence,and its intensity at 125℃is as strong as 92.14%of the intensity at room ***,it also shows an outstanding resistance against water,where its luminescence intensity is hardly changed after being immersed in pure water for 528 *** white LED lamp prepared by employing the obtained BaLu_(1.95)-Ce_(0.05)Al_(2)Ga_(2)SiO_(12)as cyan phosphor displays remarkable optical properties with CCT=4441 K,Ra=93.7,CRI=90.4 and CIE 1931(x,y)as(x=0.3648,y=0.3752).The experimental results demonstrate that BaLu_(1.95)Ce_(0.05)Al_(2)Ga_(2)SiO_(12)is a promising cyan-emitting phosphor with great application potential in full-spectrum white LEDs.

关键词： Cyan-emitting phosphor Full-spectrum white LEDs Quantum efficiency Thermal quenching Rare earths

CALCULATION OF NMR CHEMICAL SHIFTS INCLUDING d ORBITAL BY INDO/σ METHOD

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Science in China,Ser.B 1987年第12期30卷 1253-1259页

作者：吴伟雄游效曾戴安邦 Coordination Chemistry Institute Nanjing University

We have designed a new INDO/σ program which may calculate the NMR chemical shifts with both appropriate computer time and *** (190F and 13C chemical shifts for simple CFnCl4-n compounds and a transition metal complex, Fe（C5H5）（CO）2CN have been calculated accordingly. A satisfactory linear relation ship is found between the calculated value and experimental *** affords a reliable basis for the calculation of chemical shifts of large molecules and transition metal complexes.

关键词： CALCULATION OF NMR CHEMICAL SHIFTS INCLUDING d ORBITAL BY INDO METHOD NMR

MNDO/GIAO PERTURBATION THEORY OF NMR SHIELDING CONSTANTS

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Science in China,Ser.B 1988年第9期31卷 1048-1061页

作者：吴伟雄游效曾戴安邦 Shangbai Institute of Computer Technology Coordination Chemistry Institute Nanjing University

By virtue of gauge-invariant atomic orbitals （GIAO）, the basic approximations of MNDO method have been applied to the SCFMO theory of nuclear magnetic shielding constants. The derived equations are used to calculate NMR shielding constants. A simpler and more effective integration for 1-electron operators 1/rm, Lm, and Lm/rm is proposed. By proper selection of MNDO parameters and the 2-center approximation, a satisfactory agreement is obtained between the calculated and experimental 13C shielding constants for a rèpresentative set of hydrocarbons.

关键词： 13C NMR shielding constants MNDO/GIAO method theory of NMR shift.

Upconversion Luminescence Enhancement and Temperature Sensing Behavior of F- Co-doped Ba3Lu4O9:Er3+/Yb3+ Phosphors

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Upconversion Luminescence Enhancement and Temperature Sensin...

(Sc,Y)(VO_4,BO_3):Eu^(3+)红色荧光粉的制备与发光性能研究

中国稀土学会2017学术年会

作者： Songbin Liu Shuifu Liu Xinyu Ye Dejian Hou weixiong you School of Metallurgical and Chemical Engineering Jiangxi University of Science and Technology School of Material Science and Engineering Jiangxi University of Science and Technology

Upconversion luminescence materials are promising for applications in many fields,such as solid-state laser,biological imaging,3D display technologies and optical temperature sensors [1].Our previous study showed that BaLuO:Er/Yb(EYBLO) phosphor exhibits intense and color-tunable upconversion luminescence [2].Herein,a series of F-co-doped EYBLO phosphors were synthesized by a simple solid-state reaction method,and the enhancement mechanisms of upconversion luminescence and temperature sensing behavior were investigated in *** XPS results reveal that the oxygen ion vacancies come into being when the F-ions were introduced into the host matrix to occupy *** 980 nm laser diode excitation,the green and red emissions of EYBLO:0.4F-sample increase nearly 5-and 7.5-fold enhancements in contrast to EYBLO,*** on pump-power dependence and decay lifetime analysis,the energy level diagram is illustrated and the UC energy-transfer(ET) mechanism is *** enhancement is attributed to the substitution of O with F-by incorporation of F-ions into the host,which create the oxygen ion vacancy to as effective sensitizers for Er ions [3].The red/green emission intensity ratios keep increasing monotonically with the *** might be explained by the fact that oxygen ion vacancy can accelerate the transition of Er(I→I) to enhance the rate of ET(I(Er) + F(Yb) → F(Er) + F(Yb)) ***,the temperature sensing properties could be enhanced by incorporation of F-ions,and the maximum sensitivity is found to be 44.57×10 K at 523 *** is expected to enhance the sensitivity in other high-quality optical temperature-sensing material by incorporation of F-ions.

关键词： Upconversion luminescence Phosphor Temperature sensing Ba3Lu4O9 F- co-doped

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稀有金属 2016年第5期40卷 440-445页

作者：吴迪叶信宇黄昕李琴罗洋游维雄江西理工大学冶金与化学工程学院江西赣州341000 国家离子型稀土资源高效开发利用工程技术研究中心江西赣州341000

采用高温固相法在1200℃、保温3 h的条件下制备了(Sc,Y)(V_(1-x)B_x)O_(4-x):Eu^(3+)(0≤x≤0.5)系列样品,通过荧光光谱仪、X射线衍射仪(XRD)、扫描电子显微镜(SEM)对粉体的荧光性能、结构及形貌进行测试和表征。结果表明,在365 nm紫外... 详细信息

采用高温固相法在1200℃、保温3 h的条件下制备了(Sc,Y)(V_(1-x)B_x)O_(4-x):Eu^(3+)(0≤x≤0.5)系列样品,通过荧光光谱仪、X射线衍射仪(XRD)、扫描电子显微镜(SEM)对粉体的荧光性能、结构及形貌进行测试和表征。结果表明,在365 nm紫外光激发下,荧光粉主发射波长位于620 nm,对应于Eu^(3+)的~5D_0→~7F_2跃迁,当x=0.1时,相对发光强度是Sc_(0.73)Y_(0.2)VO_4:Eu_(0.07)^(3+)的1.6倍;在620 nm监控下,存在一个峰值位于337 nm的极强宽带吸收带和396 nm处的弱激发带。与(Sc,Y)VO_4:Eu^(3+)相比,硼的掺杂没有改变样品的四方晶系体心结构,且形貌未发生明显改变,粒度分布均匀、无明显团聚。在397 nm激发下,荧光粉的内量子效率提升了2倍,当温度升高至200℃,其相对发光强度仍保持在92%,显现出高的内量子效率和低的热淬灭效应,适合近紫外激发白光发光二极管(LED)用红色荧光粉。

关键词：红色荧光粉高温固相法发光强度白光发光二极管

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铁系金属釉的制备与研究

中国陶瓷 2008年第1期44卷 49-51页

作者：蒋鸿辉游伟雄江西理工大学赣州341000

采用廉价的铁系氧化物,研究了正交设计的过度金属氧化物组成、气氛、晶核剂等因素对釉面金属光泽的影响。通过铁系金属釉配方设计和工艺控制的优化,使制品具有金属光泽的艺术效果。

关键词：正交铁系金属釉艺术效果

A SIMPLIFIED MULTICENTER INTEGRATION FOR ONE-ELECTRON OPERATORS

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Chinese Science Bulletin 1988年第16期33卷 1350-1355页

作者：吴伟雄游效曾 Coordination Chemistry Institute Nanjing University Shanghai Institute of Computer Technology Coordination Chemistry Institute Nanjing University

Based on the expansion of slater type atomic orbitals (STO) into a linear combination of Gaussian type function (GTF), we have proposed a rather simple multicenter integration for one-electron operators which could be... 详细信息

关键词： simplified integration monoelectron operators tricenter

溶胶-凝胶法制备Gd_(2)Zr_(2)O_(7):Eu^(3+)红色荧光粉及其发光性能研究

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中国稀土学报 2024年第4期42卷 666-674,I0002页

作者：陈江敏赖凤琴康立强孙晶柯乐游维雄江西理工大学材料冶金化学学部江西赣州341000

采用溶胶-凝胶法制备了不同浓度Eu^(3+)离子掺杂的立方结构Gd_(2)Zr_(2)O_(7)红色荧光粉,并研究了其晶体结构、形貌、发光特性以及热稳定性、耐水性和内量子效率。结果表明,合成的样品为纯相,Eu^(3+)取代Gd^(3+)的位点,且Eu^(3+)离子占... 详细信息

采用溶胶-凝胶法制备了不同浓度Eu^(3+)离子掺杂的立方结构Gd_(2)Zr_(2)O_(7)红色荧光粉,并研究了其晶体结构、形貌、发光特性以及热稳定性、耐水性和内量子效率。结果表明,合成的样品为纯相,Eu^(3+)取代Gd^(3+)的位点,且Eu^(3+)离子占据了非中心对称的位置。Gd_(2)Zr_(2)O_(7):Eu^(3+)荧光粉可以被蓝光很好地激发,Eu^(3+)离子的最佳掺杂浓度为20%(摩尔分数)。此掺杂浓度的样品的能隙值为3.88 eV,荧光寿命为1.33 ms,红光色纯度高且发光颜色不受温度影响,具有优良的热稳定性。同时,在被水浸泡72 h后还能保持约原有强度的75%,说明此氧化物荧光粉有较好的耐水性。测试的内量子效率约为70.90%,表明Gd_(2)Zr_(2)O_(7):0.2Eu^(3+)是一种高效的荧光粉。

关键词：溶胶-凝胶法蓝光激发热稳定性耐水性稀土