您现在的位置: 首页> 研究主题> 发光粉

发光粉

发光粉的相关文献在1978年到2023年内共计335篇,主要集中在无线电电子学、电信技术、物理学、化学工业 等领域,其中期刊论文151篇、会议论文36篇、专利文献281521篇;相关期刊65种,包括企业科技与发展、技术与市场、创新作文(奇趣故事)等; 相关会议24种,包括2007年全国溶胶-凝胶科学技术学术会议、2007年中国表面工程协会蓄能发光材料与涂层技术研讨会、第六届中国纳米科技西安研讨会等;发光粉的相关文献由550位作者贡献,包括王强、吕兴栋、施鹰等。

发光粉—发文量

期刊论文>

论文:151 占比:0.05%

会议论文>

论文:36 占比:0.01%

专利文献>

论文:281521 占比:99.93%

总计:281708篇

发光粉—发文趋势图

  • 期刊论文
  • 会议论文
  • 专利文献

搜索

排序:

年份

    • 马晶; 赵婉男; 李艳红
    • 摘要: 采用溶胶凝胶-燃烧法合成了系列不同掺杂浓度Y3+和Gd3+的LaBO3:Eu3+发光粉,对其结构、形貌和发光性能进行了表征.XRD研究结果表明:发光粉的结构与基质掺杂离子的种类和掺杂浓度有关系.荧光光谱结果表明:适量比例Y3+和Gd3+离子掺杂将提高LaBO3:Eu3+发光粉的发光强度.Y3+和Gd3+离子最佳掺杂摩尔分数分别为1.5%和12.5%.5 D0→7F2与5 D0→7F1跃迁发射的相对强度比值说明:掺杂改变LaBO3:Eu3+中Eu3+局域环境的对称性.发光性能改变主要受晶体结构、掺杂离子电负性影响.Gd3+离子掺杂更有利于发光粉结构稳定性和发光性能的改善.
    • 付姚; 冷静; 邢明铭; 田莹; 罗昔贤
    • 摘要: 采用高温固相法成功制备了Ca3Y2Si3O12∶Tm3+,Yb3+上转换蓝色发光材料.在980 nm红外激光器激发下,发光粉呈现强烈的蓝光(475 nm)和近红外光(810 nm)以及较弱的红光(650 nm)发射,分别归因于Tm3+离子的1G4 →3H6、3H4→3H6和1 G4→3 F4能级跃迁.随着Yb3+离子浓度的增加,发光粉上转换发射强度和发光亮度均呈现先增强后减弱的变化趋势.在最佳掺杂浓度下(Yb3+摩尔分数为15%),蓝、红光强度分支比为12∶1,色坐标为(0.129 2,0.152 3).在3.9 W/cm2激发功率密度下,发光亮度可达6.8 cd/m2.上述结果证实,所制备发光粉呈现优异的蓝光上转换发射特性并具有潜在的应用价值.发光强度和激发光功率关系表明,所得上转换发射为三光子和双光子吸收过程.借助Tm-Yb体系能级结构详细讨论了上转换发射的跃迁机制.%Ca3Y2Si3O12 ∶ Tin3 +,Yb3 + up-conversion phosphors were synthesized by solid-state reaction method at 1 400 °C,and the up-conversion luminescence (UCL) properties of the phosphor were studied under 980 nm excitation.The phosphor exhibits strong blue light (475 nm) and near infrared light (810 nm),as well as weak red (650 nm) light,which correspond to 1G4→3H6,3H4→3H6and 1G4→3F4 transitions of Tm3+ ion,respectively.The UCL intensity and brightness of the phosphor increased firstly and then decreased with the increasing Yb3+ concentration,and the optimum concentration is 15%.Under the best doping concentration(Yb3 + mole fraction of 15%),the intensity ratio of blue and red emissions is calculated to be 12∶1,and the chromaticity coordinate of the phosphor locates at the blue region (0.129 2,0.152 3).Furthermore,the brightness of the phosphor can reach 6.8 cd/m2 as the exciting power density is increased to be 3.9 W/cm2.These measurement results indicate that the phosphor exhibits excellent blue UCL property and application potential.The dependence of the UCL intensity on excitation power proves that the observed emissions are obtained via three and two absorption processes.The transition mechanism of the phosphor excited at 980 nm is discussed in detail.
    • 张振乾; 马晶; 赵婉男; 李艳红; 张永明
    • 摘要: 采用水热法,柠檬酸钠为络合剂合成出系列NaGd(MoO_4)_2∶Eu^(3+)发光粉。利用X射线衍射(XRD)、扫描电镜(SEM)和荧光光谱等对NaGd(MoO_4)_2∶Eu^(3+)发光粉的结构、形貌和发光性能进行了表征。XRD分析结果表明:所有样品均为单一NaGd(MoO_4)_2相。SEM结果显示:NaGd(MoO_4)_2∶Eu^(3+)发光粉的形貌与柠檬酸钠的用量相关。发射光谱和激发光谱的研究结果表明:特征发射峰来自于Eu^(3+)的5D0-7FJ跃迁。宽的激发带主要来自Eu-O和MoO的电荷迁移带。柠檬酸钠为络合剂合成的样品,发光强度和激发强度下降。讨论了柠檬酸钠对结构、形貌和发光性能的影响。
    • 蔡柳; 卢晓英; 郑林; 袁敏; 张凯
    • 摘要: 采用燃烧法合成SrAl2O4∶Eu2+,Dy3+长余辉发光粉,发光粉经硅烷偶联剂A-174表面包覆改性后,再与改性环氧树脂、丙烯酸酯单体聚合反应制备水性发光环氧-丙烯酸酯复合乳液,研究表面包覆对发光粉发光性能影响,并对复合发光乳液进行性能分析.结果表明:燃烧法制备的单个发光粉粒径为100 nm;表面包覆不仅不影响发光粉的余辉性能,而且还可以提高发光粉的耐水性和改善发光粉在复合乳液中的分散性;制备的水性环氧-丙烯酸酯复合发光乳液涂膜具有优良的综合性能和长达18h的余辉性能.
    • 范乐庆; 李兆磊; 黄昀昉; 林建明; 吴季怀
    • 摘要: 采用沉淀-煅烧法制备了Gd2O3∶Er3+上转换发光粉,通过X射线衍射、扫描电子显微镜、能谱和荧光光谱对其进行了表征,并利用该发光粉具有上转换发光的特性将其应用于染料敏化太阳电池(DSSC).结果表明,管状Gd2O3∶Er3+上转换发光粉可增加电池对太阳光的吸收范围和吸收效率,提高电池的光电流和光电压.研究了掺杂量对电池性能的影响,当掺杂量为5wt%时,光电转换效率从5.93%升高到7.55%,提高约27%.
    • 杨健芝; 邱建备; 杨正文; 宋志国; 杨勇; 周大成
    • 摘要: The Ba5SiO4Cl6: Yb3+, Er3+, Li+ phosphor has been prepared by high temperature solid state reaction, and their upconversion (UC) luminescence properties and mechanisms are investigated. The UC emission bands located at 525 nm (2H11/2→4I15/2), 548 nm (4S3/2→4I15/2), and 662 nm (4F9/2→4I15/2) due to Er3+are observed under the excitation of 980 nm. UC luminescence of Ba5SiO4Cl6: Yb3+, Er3+ phosphors is increased with increasing Er3+ and Yb3+ concentration due to the energy transfer enhancement of Er3+ and Yb3+. Based on the relations of UC luminescence intensity and excitation light power, the UC luminescence mechanisms are discussed. At a low excited power (below 0.8 W), the two-photon processes are involved in both green and red UC emission mechanisms. When the power exceeds 0.9 W, the green and red UC emission is a four-photon process. One new and interesting UC emission mechanism may occur in the Ba5SiO4Cl6: Yb3+, Er3+ phosphors. Both green and red UC emissions at a higher pumping power are generated by photon avalanche UC process. Influence of Li+ doping on the UC luminescence of Ba5SiO4Cl6: Yb3+, Er3+ phosphors is investigated. Result demonstrates that Li+ ion doping could enhance the UC luminescence of Ba5SiO4Cl6: Yb3+, Er3+, which is attributed to the distortion of the local symmetry around Er3+.
    • 杨健芝; 邱建备; 杨正文; 宋志国; 杨勇; 周大成
    • 摘要: 本文采用高温固相反应法制备了Ba5SiO4Cl6:Yb3+,Er3+,Li+荧光粉,并对其上转换发光性质及其发光机理进行了研究.在980 nm激光的激发下,Ba5SiO4Cl6:Yb3+,Er3+荧光粉呈现较强的红色(662 nm)和较弱的绿色(550 nm)的上转换发光,红色和绿色的上转换发光分别对应于Er3+离子的4S3/2/2H11/2→4I15/2和4F9/2→4I15/2跃迁,且随着掺杂的Er3+和Yb3+离子浓度增加,样品的上转换发光强度增加,这是因为Yb3+离子和Er3+离子之间的能量传递效率增加引起的.在0.5—0.8 W功率激发下,样品属于双光子发射,而在0.9—1.2 W功率激发下样品具有新的上转换发光机理——光子雪崩效应.探讨了Li+掺杂对Ba5SiO4Cl6:Yb3+,Er3+样品的上转换发光性质的影响,Li+离子的掺杂引起Ba5SiO4Cl6:Yb3+,Er3+上转换发光强度增加,这是由于Li+离子的掺入降低了晶体场的对称性引起的.
    • 张霞; 李艳红; 梁哲
    • 摘要: 采用水热法制备了掺杂不同比例Ho3+/Tm3+和不同Yb3+浓度的Na Gd F4∶Ho3+,Tm3+,Yb3+上转换发光粉,对其结构和上转换发光性能进行了表征。XRD研究结果表明:所有的样品均为六方结构Na Gd F4。980 nm红外光激发下,稀土掺杂的Na Gd F4发光粉显示分别来自于Ho3+离子5S2,5F4(Ho)→5I8(Ho)跃迁发射的绿光,5F5(Ho)→5I8(Ho)跃迁发射的红光,5S2,5F4(Ho)→5I7(Ho)跃迁发射的近红外光;来自Tm3+离子1D2(Tm)→3F4(Tm)和1G4(Tm)→3H6(Tm)跃迁发射的蓝光,1G4(Tm)→3F4(Tm)跃迁发射的红光,3H4(Tm)→3H6(Tm)跃迁发射的红外光。研究了Ho3+/Tm3+比例和Yb3+浓度对发光粉上转换发光性能的影响,并讨论了体系的上转换发光机制。计算的发光粉色坐标显示:掺杂Ho3+/Tm3+比例和Yb3+浓度的变化能调控样品上转换发光颜色。
    • 李瑞琴; 王荣飞; 邱建备; 杨正文; 廖佳燕; 吴航俊; 赖神风; 宋志国; 杨勇; 周大成
    • 摘要: The Sb2 O4 ∶Yb3+ ,Tm3+ up-conversion luminescence powder with excellent physical ,chemical stability and relative low phonon energy was synthesized by the high temperature solid-state reaction and its up-conversion luminescence property was investigated .Under the 980 nm excitation ,infrared and blue up-conversion emissions centered at 800 and 480 nm were observed , which were assigned to the 1 G4 → 3 H6 and 3 H4 → 3 H6 transitions of Tm3+ ,respectively .The influence of Yb3+ and Tm3+ con-centration on the up-conversion emission property was also obtained .The up-conversion luminescence increases with increasing of Yb3+ and Tm3+ concentration .Additionally ,the up-conversion luminescence mechanism was discussed based on the depend-ence of Tm3+ up-conversion luminescence on pump power .It is interesting that two photon excitation processes for blue and in-frared emission were observed in the Sb2 O4 ∶Yb3+ ,Tm3+ powder under a 980 nm excitation .Based on the energy level diagram of Tm3+ and Yb3+ ions ,we think that two photons blue emission is contributed to the cooperation energy transfer between Tm 3+and Yb3+ ions .We believe that the Sb2 O4 ∶Yb3+ ,Tm3+ up-conversion luminescence powder will have potential application for new optical devices in up-conversion color displays ,sensors ,detection of infrared radiation ,and lasers .%高温固相法制备了Yb3+/Tm3+共掺的Sb2 O4发光粉体,研究了其上转换发光性质。在980 nm半导体激光器的激发下,样品发射较强的近红外(800 nm )和较弱的蓝色(480 nm )及红色(680 nm )上转换发光。粉末样品中稀土Yb3+及Tm3+浓度对上转换发光性质具有显著的影响,随着Yb3+或 Tm3+浓度的增加,上转换发光增强;T m3+掺杂浓度达0.8%时其上转换发光强度达到最大,之后上转换发光随T m3+浓度的增加而减弱,这是由于浓度猝灭引起的。探讨了粉末样品的上转换发光机理,在980 nm激发下 T m3+的蓝光和近红外上转换发光均属于二光子的上转换发光过程。
    • 喻胜飞; 罗武生
    • 摘要: MA-SP-SAO-ED composite phosphors were prepared with two organic materials maleic anhydride (MA) and indoline spiropyrans (SP)directly coated on the surface of SrAl2O4∶Eu2+,Dy3+ (SAO-ED) phosphors.The effect of the mass ratio and adding order of MA and SP on the properties of MA-SP-SAO-ED composite phosphors was discussed.The coating of the composite phosphors was characterized by SEM.The results show that the coated SAO-ED phosphors have higher water resistance and photoluminescence and photochromic properties when the mass ratio of MA and SP is 6∶1 and the total mass fraction is 10%.A homogenous and compact coating layer is formed.%以马来酸酐(MA)和吲哚啉螺苯并吡喃(SP)为原料,在SrAl2O4∶Eu2+,Dy3+(SAO-ED)发光粉的表面进行复合包覆制备MA-SP-SAO-ED复合发光粉,探讨MA与SP的质量比、MA和SP的加入顺序对复合发光粉性能的影响,并用扫描电镜表征复合发光粉的表面涂层.结果表明,当MA和SP同时加入SAO-ED二氯甲烷溶液中,总加入量为SAO-ED发光粉质量的10%,且MA与SP的质量比为6∶1时,复合发光粉具有较好的耐水、光致发光和光致变色等性能;在SAO-ED发光粉表面包覆了均匀致密涂层.
  • 查看更多

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号