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Triple NIR light excited up‐conversion luminescence in lanthanide‐doped BaTiO 3 phosphors for anti‐counterfeiting
Author(s) -
Wang Xiaoni,
Li Ting,
Liang Wenchao,
Zhu Chunchun,
Guo Liandong
Publication year - 2021
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.17974
Subject(s) - phosphor , luminescence , doping , materials science , excitation , lanthanide , fluorescence , excited state , photon upconversion , analytical chemistry (journal) , ion , hydrothermal circulation , green light , wavelength , optoelectronics , blue light , chemistry , optics , chemical engineering , physics , organic chemistry , chromatography , electrical engineering , engineering , nuclear physics
Up‐conversion luminescent (UCL) materials are excellent candidate for optical anti‐counterfeiting and the exploitation of multi‐wavelength NIR light triggered UC phosphors with tunable color emission is essential for reliable anti‐counterfeiting technology. Herein, a series of lanthanide ions (Er 3+ , Er 3+ –Ho 3+ , and Yb 3+ –Tm 3+ ) doped BaTiO 3 submicrometer particles are synthesized through a modified hydrothermal procedure. XRD and SEM measurements were carried out to identify the structure and morphology of the samples and their UCL properties under 808, 980, and 1550 nm NIR excitation are investigated. Er 3+ singly doped sample exhibits Er 3+ concentration‐dependent and excitation wavelength‐dependent emission color from green to yellow and orange. The corresponding UC mechanisms under three NIR light excitation are clarified. Pure red emission under 1550‐nm excitation was obtained by introducing small amount of Ho 3+ and the fluorescent lifetime test was used to confirm the energy transfer from Er 3+ to Ho 3+ . In addition, Yb 3+ –Tm 3+ co‐doped sample shows intense blue emission from 1 G 4 → 3 H 6 transition of Tm 3+ under 980‐nm excitation. As a proof of concept, the designed pattern using phosphors with red, green, and blue three primary color emissions under 1550, 808, and 980 nm NIR excitation was displayed to demonstrate their anti‐counterfeiting application.