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Elaboration, Structure, and Intense Upconversion in Transparent KYb 2 F 7 : Ho 3+ Glass‐Ceramics
Author(s) -
Wei YunLe,
Yang HeMing,
Li XiaoMan,
Wang LongJun,
Guo Hai
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.12983
Subject(s) - photon upconversion , nanocrystal , materials science , crystallization , absorption spectroscopy , photoluminescence , absorption (acoustics) , luminescence , analytical chemistry (journal) , mineralogy , nanotechnology , chemical engineering , optoelectronics , chemistry , optics , physics , chromatography , engineering , composite material
Novel transparent oxyfluoride glass‐ceramics containing KYb 2 F 7 : Ho 3+ nanocrystals were successfully elaborated by melt‐quenching technique with further thermal treatment for the first time. Their structural and luminescent properties were investigated systemically by XRD , HRTEM , absorption spectra, upconversion spectra, and lifetime measurements. Under 980 nm laser excitation, all samples exhibited characteristic emissions of Ho 3+ . Attractively, the upconversion emissions of Ho 3+ , especially green and near‐infrared emissions, were enormously enhanced 190 times after crystallization. The incorporation of Ho 3+ into KYb 2 F 7 nanocrystals with lower phonon energy was responsible for this phenomenon. Our research may enrich the understanding of fluoride‐nanocrystals‐based transparent oxyfluoride glass‐ceramics.