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Title: Dopant site-dependent luminescence from rare-earth doped dibarium octafluorohafnate Ba2HfF8 nanocubes for radiation detection

Abstract

Development of new host materials containing heavy elements for radiation detection is highly desirable. In this work, dibarium octafluorohafnate, Ba2HfF8, doped with rare-earth ions, was synthesized as cube-shaped nanocrystals via a facile hydrothermal method. The host lattice contains two Ba2+ crystallographic sites, and dopants on these sites exhibit site-dependent photoluminescence (PL), cathodoluminescence (CL) and X-ray excited radioluminescence (RL) characteristics. Single doping contents were optimized as 25 mol% Tb3+ and 5 mol% Eu3+. In Ba2HfF8:Tb3+–Eu3+ codoped nanocrystals, preferrable occupation of Eu3+ and Tb3+ at two different Ba2+ sites in the host lattice was observed. The nanocubes exhibited enhanced emissions over micron sized particles. In PL, the presence of Tb3+ ions significantly enhanced the emission intensity of Eu3+ ions due to energy transfer from the Tb3+ to Eu3+ ions, while under high-energy irradiation in CL or RL, Tb3+ emission was intensified. X-ray induced RL with afterglow in seconds was observed. Finally, it was found that the codoped sample showed higher sensitivity than the singly doped sample, indicating that codoping is an effective strategy to develop a scintillator with this host structure for high-energy radiation detection.

Authors:
 [1]; ORCiD logo [1];  [1];  [2];  [2]; ORCiD logo [2]; ORCiD logo [1]
  1. Fayetteville State Univ., NC (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); USDOD
OSTI Identifier:
1804297
Grant/Contract Number:  
AC02-06CH11357; ECCS 1900837; W911NF-09-1-0011; DMR-1626376
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Materials Chemistry C
Additional Journal Information:
Journal Volume: 9; Journal Issue: 5; Journal ID: ISSN 2050-7526
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY

Citation Formats

Kumar, Vineet, George, Gibin, Hayes, Jacob I., Lin, Yulin, Guzelturk, Burak, Wen, Jianguo, and Luo, Zhiping. Dopant site-dependent luminescence from rare-earth doped dibarium octafluorohafnate Ba2HfF8 nanocubes for radiation detection. United States: N. p., 2021. Web. doi:10.1039/d0tc05051b.
Kumar, Vineet, George, Gibin, Hayes, Jacob I., Lin, Yulin, Guzelturk, Burak, Wen, Jianguo, & Luo, Zhiping. Dopant site-dependent luminescence from rare-earth doped dibarium octafluorohafnate Ba2HfF8 nanocubes for radiation detection. United States. https://doi.org/10.1039/d0tc05051b
Kumar, Vineet, George, Gibin, Hayes, Jacob I., Lin, Yulin, Guzelturk, Burak, Wen, Jianguo, and Luo, Zhiping. Tue . "Dopant site-dependent luminescence from rare-earth doped dibarium octafluorohafnate Ba2HfF8 nanocubes for radiation detection". United States. https://doi.org/10.1039/d0tc05051b. https://www.osti.gov/servlets/purl/1804297.
@article{osti_1804297,
title = {Dopant site-dependent luminescence from rare-earth doped dibarium octafluorohafnate Ba2HfF8 nanocubes for radiation detection},
author = {Kumar, Vineet and George, Gibin and Hayes, Jacob I. and Lin, Yulin and Guzelturk, Burak and Wen, Jianguo and Luo, Zhiping},
abstractNote = {Development of new host materials containing heavy elements for radiation detection is highly desirable. In this work, dibarium octafluorohafnate, Ba2HfF8, doped with rare-earth ions, was synthesized as cube-shaped nanocrystals via a facile hydrothermal method. The host lattice contains two Ba2+ crystallographic sites, and dopants on these sites exhibit site-dependent photoluminescence (PL), cathodoluminescence (CL) and X-ray excited radioluminescence (RL) characteristics. Single doping contents were optimized as 25 mol% Tb3+ and 5 mol% Eu3+. In Ba2HfF8:Tb3+–Eu3+ codoped nanocrystals, preferrable occupation of Eu3+ and Tb3+ at two different Ba2+ sites in the host lattice was observed. The nanocubes exhibited enhanced emissions over micron sized particles. In PL, the presence of Tb3+ ions significantly enhanced the emission intensity of Eu3+ ions due to energy transfer from the Tb3+ to Eu3+ ions, while under high-energy irradiation in CL or RL, Tb3+ emission was intensified. X-ray induced RL with afterglow in seconds was observed. Finally, it was found that the codoped sample showed higher sensitivity than the singly doped sample, indicating that codoping is an effective strategy to develop a scintillator with this host structure for high-energy radiation detection.},
doi = {10.1039/d0tc05051b},
journal = {Journal of Materials Chemistry C},
number = 5,
volume = 9,
place = {United States},
year = {Tue Jan 12 00:00:00 EST 2021},
month = {Tue Jan 12 00:00:00 EST 2021}
}

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