Mechanically driven luminescence in a ZnS:Cu-PDMS composite | Zendy

KeeSun Sohn | Zendy; Suman Timilsina | Zendy; Satendra Pal Singh | Zendy; Taekjib Choi | Zendy; Ji Sik Kim | Zendy

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Mechanically driven luminescence in a ZnS:Cu-PDMS composite

Author(s) -

KeeSun Sohn,

Suman Timilsina,

Satendra Pal Singh,

Taekjib Choi,

Ji Sik Kim

Publication year - 2016

Publication title -

apl materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.571

H-Index - 60

ISSN - 2166-532X

DOI - 10.1063/1.4964139

Subject(s) - materials science , mechanoluminescence , luminescence , composite number , piezoelectricity , phosphor , polydimethylsiloxane , composite material , persistent luminescence , trapping , optoelectronics , chemical engineering , thermoluminescence , ecology , biology , engineering

The conventional mechanoluminescence (ML) mechanism of phosphors such as SrAl2O4:Eu and ZnS:Mn is known to utilize carrier trapping at shallow traps followed by stress (or strain)-induced detrapping, which leads to activator recombination in association with local piezoelectric fields. However, such a conventional ML mechanism was found to be invalid for the ZnS:Cu-embedded polydimethylsiloxane (PDMS) composite, due to the absence of luminescence with a rigid matrix and a negligibly small value of the piezoelectric coefficient (d33) of the composite. An alternative mechanism, namely, the triboelectricity-induced luminescence has been proposed for the mechanically driven luminescence of a ZnS:Cu-PDMS composite

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