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Crystal structure and pale‐yellow emitting properties of K 3 Gd 1– x Dy x B 6 O 12 solid solutions
Author(s) -
Zhang Rui-Juan,
Shi Jian-Chao,
Zhao Dan-Dan,
Han Xiao-Yang,
Deng Ling,
Cui Xiao-Qi,
Zhao Dan
Publication year - 2019
Publication title -
acta crystallographica section c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 17
ISSN - 2053-2296
DOI - 10.1107/s2053229619013305
Subject(s) - phosphor , dysprosium , photoluminescence , crystal structure , crystallography , ion , materials science , analytical chemistry (journal) , x ray crystallography , emission spectrum , luminescence , doping , crystal (programming language) , powder diffraction , spectral line , chemistry , diffraction , inorganic chemistry , optics , physics , programming language , optoelectronics , organic chemistry , chromatography , astronomy , computer science
A new potassium dysprosium polyborate, K 3 DyB 6 O 12 , has been prepared via the high‐temperature molten salt method and structurally characterized by single‐crystal X‐ray diffraction analysis. The structure can be described as a three‐dimensional framework composed of isolated bicyclic [B 5 O 10 ] 5− groups and Dy 3+ and K + ions. The Fourier transform IR (FT–IR) and ultraviolet–visible (UV–Vis) spectra were investigated. A series of K 3 Gd 1– x Dy x B 6 O 12 phosphors was prepared and their photoluminescence properties were studied. The K 3 Gd 1– x Dy x B 6 O 12 phosphors exhibit a strong yellow emission band at 577 nm (the 4 F 9/2 → 6 H 13/2 transition of Dy 3+ ) under UV excitation of 275 nm (the 8 S 7/2 → 6 I J transition of Gd 3+ ), suggesting the occurrence of the energy transfer Gd 3+ →Dy 3+ . The optimized doping concentration of the Dy 3+ ion was 8 mol%. We may expect that K 3 Gd 1– x Dy x B 6 O 12 is a promising pale‐yellow emission phosphor for visual displays or solid‐state lighting.