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Photochromism‐induced light scattering and photoswithing in Er doped (K,Na)NbO 3 transparent ceramics
Author(s) -
Sun Haiqin,
Lv Yang,
Zhu Yan,
Lin Jinfeng,
Wu Xiao,
Zhang Qiwei,
Hao Xihong
Publication year - 2019
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.16534
Subject(s) - photochromism , materials science , transmittance , irradiation , ceramic , transparent ceramics , light scattering , doping , optoelectronics , visible spectrum , optics , photon upconversion , scattering , analytical chemistry (journal) , chemistry , nanotechnology , composite material , physics , chromatography , nuclear physics
The (K 0.5 Na 0.5 ) 0.95 Li 0.05 Nb 0.95 Bi 0.05 O 3 ‐1mol% Er 2 O 3 transparent ceramics were prepared by a pressureless sintering method. The fabricated transparent ceramics not only exhibit high optical transmittance (85.3%) due to dense microstructure (nanoscale size grains), but also show the photochromism‐induced light scattering and reversible upconversion (UC)‐switching properties by visible light irradiation. Upon 407 nm light irradiation, the optical transmittance intensity is significantly decreased, showing a strong light scattering (ΔAbs = 28.3%). The light scatting degree can be quantitatively reflected by Er 3+ ion UC emission, and could be recovered to its initial optical transmittance based on photochromic reactions. Meanwhile, the transparent ceramic is found to maintain good energy storage properties with higher W (5.87 J/cm 3 ) and W rec (1.96 J/cm 3 ) under a higher electric field of 260 kV/cm. These results suggest that Er 3+ doped (K 0.5 Na 0.5 )NbO 3 transparent ceramics are promising for the modulation of light scattering and the design of photoelectric multifunction devices.