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： O482.3
- Received：03 January 2020，
  
  Revised：22 January 2020，
  
  Published Online：18 February 2020，
  
  Published：05 April 2020
- 稿件说明：
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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

∶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

∶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

∶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

∶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

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

离子的5d

5/2

和5d

7/2

跃迁，Ce

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

∶Ce nanocrystalline was synthesized by the sol-gel method. The structure

morphologies and scintillation properties of Lu

∶Ce nanocrystalline were characterized by X-ray diffractometer (XRD)

scanning electron microscope (SEM)

photoluminescence and X-ray excited luminescence. The results indicate that Lu

∶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

∶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

ions. The emission peak under 350 nm and X-ray excitation both exhibit a typical asymmetric peak

which are attribute to 5d

5/2

and 5d

7/2

transition of the Ce

ions. The optimized doping concentration of Ce

ion is about 1%. The decay time of the as-prepared Lu

∶Ce phosphor is about 37.2 ns

which can satisfy the requirement of the X-ray detection with high time resolution.

关键词

Keywords

references

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