Broadband near-infrared luminescence and energy transfer of Cr3+, Ce3+co-doped Ca2LuHf2Al3O12 phosph

来源 :稀土学报(英文版) | 被引量 : 0次 | 上传用户:yy838026
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Broadband near-infrared phosphors are highly desirable for food testing. Targeted Ca2LuHf2Al3O12:Cr3+(CLHA:Cr3+) and Ca2LuHf2Al3O12:Ce3+,Cr3+ (CLHA:Ce3+,Cr3+) phosphors were synthesized by the con-ventional high-temperature solid state reaction. The CLHA:Cr3+phosphor, with a good thermal stability, shows a red shift owing to radiation reabsorption and non-radiative transition with increasing Cr3+content. For co-doped sample, the emission intensity of Cr3+can be enhanced by three times due to the energy transfer from Ce3+to Cr3+, which can be evidenced by a significant overlap between the PLE of Cr3+ single-doped phosphor and the PL of Ce3+ single-doped phosphor. In addition, the mechanism of energy transfer is identified as a quadrupole-quadrupole interaction according to decay lifetime and Dexter's energy transfer formula. The broadband NIR emission peaked at 775 nm of CLHA:Cr3+,Ce3+phosphor shows a bright prospect in nondestructive quality-control analysis systems for food.
其他文献
进入冬季,天气日益变凉,气候也异常干燥,人们应注意预防以下四种常见但又容易忽视的病症。鼻出血病因:因为气温逐渐变低,空气干燥而导致鼻腔也干燥,鼻腔毛细血管扩张。另 In
那是一种内在与外表完美统一的美丽:两鬓微露的银丝与眼角的皱纹掩饰不住她端庄秀雅的面庞,自信与恬淡清晰地写在脸上。人常说,有梦想的人是美丽的,是那种追求尽善尽美、播种
请下载后查看,本文暂不支持在线获取查看简介。 Please download to view, this article does not support online access to view profile.
期刊
柳州市收藏家协会黄龙玉分会成立于2012年元月,是由柳州从事黄龙玉行业的商家和个人,以及黄龙玉爱好者自愿组成的、从事非营利性社会服务活动的分支机构,现有会员60多人。分
成型加工工艺是决定塑料模板性能的重要一环,对工艺的研究对塑料模板开发具有重要意义。开展塑料模板生产工艺的研究,并结合施工工艺的标准,是提高塑料模板性能和使用便捷性
期刊
反拨效应是检验一种测试是促进了还是阻碍了学习者的学习效果。西方国家对于测试对教师教学和学生学习的反拨作用的研究历时已久,为了更好的运用此系统,本文就英语在线作文评
教书育人,教的不仅仅是知识,更是做人的原则;育的不仅仅是小孩,更是国家、乃至世界的未来.