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Eu 2+ ‐Doped Yellow‐Emitting CsBaB 3 O 6 Glass‐Ceramic Prepared by Melt Quenching and Re‐Crystallization Method
Author(s) -
Xie Hongde,
Chen Luyang,
Yuan Chen,
Cai Peiqing,
Kim Sun Il,
Seo Hyo Jin
Publication year - 2014
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.13111
Subject(s) - phosphor , photoluminescence , analytical chemistry (journal) , luminescence , doping , materials science , amorphous solid , excited state , mineralogy , chemistry , crystallography , optoelectronics , physics , atomic physics , chromatography
Eu 3+ ‐doped cesium barium borate glass with the composition of Cs 2 O ·2 BaO ·3 B 2 O 3 was prepared by the conventional melt quenching method. The glass‐ceramic sample was obtained from the re‐crystallization of the as‐made glass to change the amorphous glass into a crystalline host. This reduces the Eu 3+ in glass to Eu 2+ ions resulting in a yellow‐emitting phosphor of Eu 2+ ‐activated CsBaB 3 O 6 . The samples were investigated by the XRD patterns and SEM micrograph, the optical absorption, the photoluminescence spectra, and decay curves. The as‐made glass has only Eu 3+ centers. Under the excitation of blue or near‐ UV light, Eu 2+ ‐doped CsBaB 3 O 6 presents yellow‐emitting color from the allowed inter‐configurational 4 f –5 d transition in the Eu 2+ ions. The maximum absolute luminescence quantum efficiencies of Eu 2+ ‐doped CsBaB 3 O 6 phosphor was measured to be 47% excited at 430 nm light at 300 K. By taking into account the efficient excitation in blue wavelength region, this new phosphor could be a potential yellow‐emitting phosphor for an application in white light‐emitting diodes fabricated with blue chips.