diphase ceramics with the self-assembled piezoelectric/phosphor/piezoelectric sandwich architectures have been synthesized using the solid-state reaction method. Their structure, elastico-mechanoluminescence (EML) property, and trap energy levels are characterized. In the diphase region, strong EML has been obtained and optimized. The relation between EML and electroluminescence (EL) has been investigated. The EML phenomenon under the strong pressure is explained by the piezoelectrically induced EL model. Whereas, the mechanoluminescene mechanism under the weak pressure is discussed using the piezoelectrically induced charge detrapping model.
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Zhang et al. (2010) studied this question.
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