Open AccessElastico-mechanoluminescence in CaZr(PO_4)_2:Eu^2+ with multiple trap levels
Author(s) -
Juncheng Zhang,
ChaoNan Xu,
YunZe Long
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.013699
Subject(s) - mechanoluminescence , phosphor , optics , materials science , luminescence , trap (plumbing) , luminance , optoelectronics , ion , intensity (physics) , range (aeronautics) , physics , composite material , quantum mechanics , meteorology
We report on a novel elastico-mechanoluminescence (EML) phosphor of CaZr(PO4)2:Eu2+ for simultaneous luminescent sensing and imaging to mechanical load by the light-emitting of Eu2+ ions. The EML properties of CaZr(PO4)2:Eu2+ show an intense luminance (above 15 mcd m(-2)), a low load threshold (below 5 N), a broad measurement range for the dynamic load (up to 2000 N), and an accurate linear relationship of EML intensity against the applied load. The excellent EML characteristics are considered to originate from the piezoelectric crystal structure and the multiple trap levels with appropriate depths. An EML mechanism based on the electrons as the main charge carriers is proposed.