TY - JOUR
T1 - Exploration about superior anti-counterfeiting ability of Sm3+ doped KSr2Nb5O15 photochromic ceramics
T2 - Origin and atomic-scale mechanism
AU - Cao, Shuyao
AU - Zhu, Jiatong
AU - Chen, Qian
AU - Liu, Junting
AU - Wu, Changying
AU - Li, Leilei
AU - Xu, Jie
AU - Yan, Haixue
AU - Gao, Feng
N1 - Publisher Copyright:
© 2021 The Chinese Ceramic Society
PY - 2022/1
Y1 - 2022/1
N2 - Reversible luminescence modulation behavior upon the photochromic effect endows the photochromic ceramics with great potential in anti-counterfeiting and data storage applications. Here, Sm3+-doped KSr2Nb5O15 photochromic ceramics exhibit superior anti-counterfeiting ability: good covertness and considerable modulation ratio of luminescent emission intensity after photochromic reaction. The results show that the photochromism originated from oxygen and cation vacancies, which were directly identified by electron paramagnetic resonance and positron annihilation lifetime spectra. Unexpectedly, oxygen vacancies work more effectively than cation vacancies during photochromic reactions. Moreover, the extraordinary anti-counterfeiting ability was attributed to the high energy transfer rate, which was particularly caused by the short mean distance below 1 nm between the Sm3+ and vacancies. The work here has provided atomic-scale structural evidence and made a progress in understanding the photochromic origins and mechanism in color-center theory.
AB - Reversible luminescence modulation behavior upon the photochromic effect endows the photochromic ceramics with great potential in anti-counterfeiting and data storage applications. Here, Sm3+-doped KSr2Nb5O15 photochromic ceramics exhibit superior anti-counterfeiting ability: good covertness and considerable modulation ratio of luminescent emission intensity after photochromic reaction. The results show that the photochromism originated from oxygen and cation vacancies, which were directly identified by electron paramagnetic resonance and positron annihilation lifetime spectra. Unexpectedly, oxygen vacancies work more effectively than cation vacancies during photochromic reactions. Moreover, the extraordinary anti-counterfeiting ability was attributed to the high energy transfer rate, which was particularly caused by the short mean distance below 1 nm between the Sm3+ and vacancies. The work here has provided atomic-scale structural evidence and made a progress in understanding the photochromic origins and mechanism in color-center theory.
KW - Atomic-scale analysis
KW - Luminescence modulation
KW - Photochromism
KW - Tetragonal tungsten bronze structure
UR - http://www.scopus.com/inward/record.url?scp=85109068350&partnerID=8YFLogxK
U2 - 10.1016/j.jmat.2021.06.001
DO - 10.1016/j.jmat.2021.06.001
M3 - 文章
AN - SCOPUS:85109068350
SN - 2352-8478
VL - 8
SP - 38
EP - 46
JO - Journal of Materiomics
JF - Journal of Materiomics
IS - 1
ER -