相关实验视频
Updated: Jan 6, 2026
10:18
Blue-hazard-free Candlelight OLED
Published on: March 19, 2017
9.8K
Si2O5:Sm3+ 色-红色发射的潜伏指纹检测应用程序
Pranjal Pathak1, Janita Saji2, Durga Verma3
1Department of Physics, North-Eastern Hill University Shillong, Meghalaya, 793022, India.
Journal of fluorescence
|October 4, 2025
概括
为了潜在的应用,合成了新的色红色,CaSi2O5:Sm3+. 最佳的2mol%Sm3+兴奋剂度显示出高颜色纯度和强烈的发光,使其适合指纹开发.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 发光的光度是非常的低.
背景情况:
- 开发具有理想光学特性的新型光体对于先进应用至关重要.
- (Sm3+) 合物材料以其特有的红色发射而闻名,在各种光学设备中非常有用.
- 酸 (CaSi2O5) 被探索为发光剂的宿主材料.
研究的目的:
- 为了合成和描述发射CaSi2O5:Sm3+的色-红色.
- 调查Sm3+兴奋剂度对结构和光发光特性的影响.
- 评估这些的实际应用潜力,包括指纹检测.
主要方法:
- 高温固态反应被用于合成CaSi2O5:xSm3+.
- 鉴定包括X射线衍射 (XRD) 检测晶体结构和相纯度,光谱检测光发光 (PL) 和热发光 (TL).
- 对光发光的发射光谱进行了贾德-奥菲尔特分析,以研究过渡动态.
主要成果:
- 合成的CaSi2O5:Sm3+体在263nm时表现出强烈的激发.
- 在595nm和629nm观察到具有特征的色-红色排放峰值,归因于Sm3+过渡.
- 最佳的Sm3+兴奋剂度被确定为2mol%,以CIE坐标 (0.589,0.41) 的颜色纯度为96.93%.
- 在无孔基板上成功开发指纹证明了其实际适用性.
结论:
- 通过可调节的色-红色辐射成功合成了CaSi2O5:Sm3+.
- 2mol%Sm3+的最佳兴奋剂度提供了出色的发光性能和高颜色纯度.
- 这些体显示出实用应用的巨大潜力,特别是在指纹可视化方面的法医科学中.
相关概念视频
01:14Photoluminescence: Applications
962
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
962
01:19Gas Chromatography: Types of Detectors-II
1.0K
In gas chromatography, different detectors are employed to meet specific analytical needs. These detectors are often categorized based on their detection mechanisms and the types of compounds they are best suited to analyze. Thermal Conductivity Detectors (TCD), Flame Ionization Detectors (FID), and Electron Capture Detectors (ECD) represent common categories, each with unique operating principles and applications. However, beyond these, several other detectors are designed for more specialized...
1.0K
01:26Variables Affecting Phosphorescence and Fluorescence
1.2K
Fluorescence and phosphorescence are essential phenomena in fields like analytical chemistry, biological imaging, and materials science, where they detect molecular properties and visualize cellular structures. Understanding the variables that influence these luminescent behaviors is crucial for maximizing accuracy and efficiency in their applications. These variables can broadly be grouped into chemical structure, solvent properties, and external conditions, each playing a distinct role in...
1.2K