• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Blue, green and red upconversions in Ho2O3-doped fluorophosphate glasses
【24h】

Blue, green and red upconversions in Ho2O3-doped fluorophosphate glasses

机译：Ho2O3掺杂的氟磷酸盐玻璃中的蓝色，绿色和红色上转换

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Near infrared (NIR) to visible upconversions of a fluorophosphate glass of composition (mol%) 7Ba(PO3)2–32AlF3–30CaF2–18SrF2–13MgF2 doped with various concentrations (0.1, 0.3 and 1.0 mol%) of Ho2O3 have been investigated by exciting at 892 nm at room temperature. Three upconverted bands originated from the 5F3 → 5I8, (5S2, 5F4) → 5I8 and 5F5 → 5I8 transitions have been found to center at 491 nm (blue), 543 nm (green) and 658 nm (red), respectively. These bands have been justified from the evaluation of the absorption, normal (down conversion) fluorescence and excitation spectra. The upconversion processes have been interpreted by the excited state absorption (ESA), energy transfer (ET) and cross relaxation (CR) mechanisms involving population of the metastable (storage) energy levels by multiphonon deexcitation effect. It is evident from the infrared reflection spectral (IRRS) analysis that the upconversion phenomena are expedited by the low multiphonon relaxation rate in fluorophophate glasses owing to their high intense low phonon energy of 600 cm-1 which is very close to that of fluoride glasses (500–600 cm-1).
机译：研究人员研究了掺有各种浓度（0.1、0.3和1.0 mol％）的Ho2O3的7Ba（PO3）2–32AlF3–30CaF2–18SrF2–13MgF2的氟磷酸盐玻璃的近红外（NIR）到可见的上转换。在室温下于892 nm处激发。已发现源自5F3→5I8（5S2、5F4）→5I8和5F5→5I8的三个上转换带分别以491 nm（蓝色），543 nm（绿色）和658 nm（红色）为中心。从吸收，正常（下转换）荧光和激发光谱的评估中可以证明这些带是合理的。上转换过程由激发态吸收（ESA），能量转移（ET）和交叉弛豫（CR）机制解释，该机制涉及通过多声子去激发效应引起的亚稳态（存储）能级的聚集。从红外反射光谱（IRRS）分析可以明显看出，氟磷酸盐玻璃的多声子弛豫速率低，因为其600 cm-1的高强度低声子能量非常接近氟化物玻璃，从而加速了上转换现象（ 500–600 cm-1）。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

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