| 双钙钛矿型Ca2Gd1-xTaO6：xTb3+绿色荧光粉的合成与荧光性质 |
| Synthesis and Luminescence Properties of Double Perovskite Ca2Gd1-xTaO6: xTb3+ Green Phosphors |
|
| 摘要: 通过高温固相法合成了双钙钛矿型Ca2Gd1-xTaO6：xTb3+（CGTO：xTb3+）绿色荧光粉。采用X射线衍射、扫描电镜、荧光光谱、荧光衰减曲线、量子效率（η）测试分别表征了CGTO： xTb3+荧光粉的物相、形貌和荧光性质。在紫外光激发下，CGTO： xTb3+荧光粉实现了较强的绿光发射，绿光为Tb3+离子的5D4-7F5跃迁。通过变温发射光谱研究发现CGTO：0.15Tb3+荧光粉的热猝灭活化能为0.181 9 eV。在255 nm的激发下，最佳Tb3+掺杂浓度的CGTO：0.15Tb3+荧光粉的量子效率为32.32%。 |
| 关键词: 绿色荧光粉 Ca2GdTaO6 发光 Tb3+ |
| 基金项目: 国家自然科学基金（No.51862012）、江西省自然科学基金（No.20202BAB204008，20165ABC28010）和赣州市创新领军人才计划资助。 |
| Abstract: A series of double perovskite Ca2Gd1-xTaO6:xTb3+ (CGTO:xTb3+) phosphors were prepared by a hightemperature solid-state reaction method. The X-ray diffraction, scanning electron microscopy, photoluminescence spectroscopy, decay curve and quantum efficiency (η) were used to characterize CGTO:xTb3+ phosphors. Under UV excitation, CGTO:xTb3+ phosphors show intense green light emission, which is originated from the characteristic 5D4-7F5 transition of the Tb3+ ion. On the basis of temperature-dependence luminescence spectra, the activation energy of thermal quenching was about 0.181 9 eV for CGTO:0.15Tb3+ phosphor. CGTO:0.15Tb3+ phosphor as optimum doping concentration exhibited intensive green emission with the η of 32.32% under 255 nm excitation. |
| Keywords: green phosphor Ca2GdTaO6 luminescence Tb3+ |
| 投稿时间：2021-04-13 修订日期：2021-08-09 |
| 摘要点击次数: 1066 |
| 全文下载次数: 390 |
| 彭光怀,温和瑞,韩卓,廖金生.双钙钛矿型Ca2Gd1-xTaO6：xTb3+绿色荧光粉的合成与荧光性质[J].无机化学学报,2021,37(10):1893-1899. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| Support information: |
|
|
|
|
|
|
