Sol-gel Synthesis and Scintillation Properties of Lu2Si2O7∶Ce Nanocrystalline

LI Qian-li; HU Ya-hua; MA Yu-bin; HUANG Shi-ming; GU Mu; ZHANG Zhi-jun; ZHAO Jing-tai

doi:10.3788/fgxb20204104.0364

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Sol-gel Synthesis and Scintillation Properties of Lu₂Si₂O₇∶Ce Nanocrystalline

Synthesis and Properties of Materials | 更新时间：2020-08-12

- Sol-gel Synthesis and Scintillation Properties of Lu₂Si₂O₇∶Ce Nanocrystalline
- Chinese Journal of Luminescence Vol. 41, Issue 4, Pages: 364-370(2020)
- 作者机构：
  
  1. 上海大学材料科学与工程学院上海,200444
  2. 嘉兴学院南湖学院,浙江嘉兴,314001
  3. 同济大学物理科学与工程学院上海,200092
- 作者简介：
- 基金信息：
  
  Supported by National Natural Science Foundation of China(11475128,11675121,11905122
- DOI：10.3788/fgxb20204104.0364
  CLC：
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李乾利, 胡亚华, 马玉彬等. Lu2Si2O7∶Ce纳米晶的溶胶-凝胶法合成和闪烁性能[J]. 发光学报, 2020,41(4): 364-370

LI Qian-li, HU Ya-hua, MA Yu-bin etc. Sol-gel Synthesis and Scintillation Properties of Lu2Si2O7∶Ce Nanocrystalline[J]. Chinese Journal of Luminescence, 2020,41(4): 364-370
李乾利, 胡亚华, 马玉彬等. Lu2Si2O7∶Ce纳米晶的溶胶-凝胶法合成和闪烁性能[J]. 发光学报, 2020,41(4): 364-370 DOI： 10.3788/fgxb20204104.0364.

LI Qian-li, HU Ya-hua, MA Yu-bin etc. Sol-gel Synthesis and Scintillation Properties of Lu2Si2O7∶Ce Nanocrystalline[J]. Chinese Journal of Luminescence, 2020,41(4): 364-370 DOI： 10.3788/fgxb20204104.0364.

摘要

采用溶胶-凝胶法制备了Lu,2,Si,2,O,7,∶Ce纳米晶，利用X射线衍射（XRD）、扫描电镜（SEM）、荧光光谱仪、X射线激发发射谱仪对制备的Lu,2,Si,2,O,7,∶Ce纳米晶的晶相结构、微观形貌和光学性能进行了表征。结果表明，溶胶-凝胶法制备的Lu,2,Si,2,O,7,∶Ce前驱体在煅烧温度为1 000℃时开始晶化，晶粒尺寸随着煅烧温度的升高而变大，1 200℃煅烧2 h后的晶体颗粒均匀，分散性最优，平均晶粒尺寸约为28.9 nm，呈近球形；Lu,2,Si,2,O,7,∶Ce纳米晶的紫外吸收谱存在峰位分别为304 nm和350 nm两个吸收峰，源自于Ce,3+,离子的4f5d跃迁；光致发射谱和X射线激发发射谱都表现为典型的非对称双峰结构，归属于Ce,3+,离子的5d,1,2,F,5/2,和5d,1,2,F,7/2,跃迁，Ce,3+,离子的最佳掺杂浓度约为1%；荧光衰减时间约为37.2 ns，可满足高时间分辨X射线探测需要。

Abstract

Cerium-doped lutetium pyrosilicate Lu,2,Si,2,O,7,∶Ce nanocrystalline was synthesized by the sol-gel method. The structure, morphologies and scintillation properties of Lu,2,Si,2,O,7,∶Ce nanocrystalline were characterized by X-ray diffractometer (XRD), scanning electron microscope (SEM), photoluminescence and X-ray excited luminescence. The results indicate that Lu,2,Si,2,O,7,∶Ce starts to crystallize at about 1 000 ℃ and the crystallite size increases with the increasing calcining temperature. Well dispersed, homogeneous and near-spherical Lu,2,Si,2,O,7,∶Ce powder with an average grain size about 28.9 nm was obtained after sintering at 1 200 ℃ for 2 h. The excitation spectrum consists of two intense broad bands at 304 nm and 350 nm, which are corresponding to the 4f5d transition of Ce,3+, ions. The emission peak under 350 nm and X-ray excitation both exhibit a typical asymmetric peak, which are attribute to 5d,1,2,F,5/2, and 5d,1,2,F,7/2, transition of the Ce,3+, ions. The optimized doping concentration of Ce,3+, ion is about 1%. The decay time of the as-prepared Lu,2,Si,2,O,7,∶Ce phosphor is about 37.2 ns, which can satisfy the requirement of the X-ray detection with high time resolution.

关键词

闪烁材料Lu2Si2O7∶Ce纳米晶溶胶-凝胶法荧光光谱X射线探测

Keywords

scintillation materialsLu2Si2O7∶Ce nanocrystallinesol-gel methodphotoluminescenceX-ray detection

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Key Laboratory of Advanced Materials of Yunnan Province， Faculty of Materials Science and Engineering， Kunming University of Science and Technology

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