Journal Article

PUBDB-2026-03163

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Influence of charge compensators on the photoluminescence and thermoluminescence of CaSO$_4$:Tb,A$ (A=Na, K, Rb, F, Cl, Br) phosphors

Kudryavtseva, I. (Corresponding author) ; Spassky, D. A.Extern*

2027
Elsevier Science Amsterdam [u.a.]

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Please use a persistent id in citations: doi:10.1016/j.optmat.2026.118597

Abstract: The influence of charge compensators on the luminescence properties of Tb-doped anhydrite CaSO4 powders was studied for 9 phosphors synthesized by solid-phase reactions from the starting materials CaSO4, (NH4)2SO4, Tb4O7 or TbCl3, MeCl (Me = K, Na, Rb), or NaHal (Hal = F, Cl, Br). A comprehensive analysis of the luminescence excitation spectra in the 4.8–45 eV region for the blue luminescence (BL) and green luminescence (GL) series of Tb3+ ions was performed. It was shown that the intensity of Tb3+ emission increases as the ionic radius of the charge-compensating Me ion decreases. The GL/BL ratio depends on the charge compensator and excitation energy and is determined by the relative concentrations of complex terbium centers containing at least two terbium ions and single Tb3+ ions. It was shown that the CaSO4 phosphor synthesized from Tb4O7 and NaCl starting materials is the most efficient phosphor for spectral converters. The absence of charge compensating ions gives rise to a deep trapping centers related to cation vacancies. Based on analysis of the thermally stimulated luminescence curves, the CaSO4:TbCl3 phosphor is considered the most promising for dosimetry.

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Contributing Institute(s):

1. DOOR-User (DOOR)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
2. FS-Proposal: I-20250467 EC (I-20250467-EC) (I-20250467-EC)
3. NEPHEWS - NEutrons and PHotons Elevating Worldwide Science (NEPHEWS) (101131414) (101131414)

Experiment(s):

1. PETRA Beamline P66 (PETRA III)

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Database coverage:
; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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