Interfacial Triboelectricity Lights Up Phosphor-Polymer Elastic Composites: Unraveling the Mechanism of Mechanoluminescence in Zinc Sulfide Microparticle-Embedded Polydimethylsiloxane Films.

Autor: Lee G; Division of Nanotechnology, DGIST, Daegu, 42988, Republic of Korea.; Department of Energy Science and Engineering, DGIST, Daegu, 42988, Republic of Korea., Song S; Division of Energy Technology, DGIST, Daegu, 42988, Republic of Korea., Jeong WH; Division of Nanotechnology, DGIST, Daegu, 42988, Republic of Korea.; Department of Chemistry, Research Institute for Natural Sciences and Research Institute for Convergence of Basic Science, Hanyang University, Seoul, 04763, Republic of Korea., Lee C; Department of Energy Science and Engineering, DGIST, Daegu, 42988, Republic of Korea., Kim JS; Division of Nanotechnology, DGIST, Daegu, 42988, Republic of Korea., Lee JH; Department of Energy Science and Engineering, DGIST, Daegu, 42988, Republic of Korea., Choi J; Department of Energy Science and Engineering, DGIST, Daegu, 42988, Republic of Korea., Choi H; Department of Chemistry, Research Institute for Natural Sciences and Research Institute for Convergence of Basic Science, Hanyang University, Seoul, 04763, Republic of Korea., Kim Y; Department of Chemistry, Kookmin University, Seoul, 02707, Republic of Korea., Lim SJ; Division of Nanotechnology, DGIST, Daegu, 42988, Republic of Korea., Jeong SM; Division of Energy Technology, DGIST, Daegu, 42988, Republic of Korea.; Department of Interdisciplinary Engineering, DGIST, Daegu, 42988, Republic of Korea.
Jazyk: angličtina
Zdroj: Small (Weinheim an der Bergstrasse, Germany) [Small] 2024 Apr; Vol. 20 (17), pp. e2307089. Date of Electronic Publication: 2024 Jan 07.
DOI: 10.1002/smll.202307089
Abstrakt: Composites comprising copper-doped zinc sulfide phosphor microparticles embedded in polydimethylsiloxane (ZnS:Cu-PDMS) have received significant attention over the past decade because of their bright and durable mechanoluminescence (ML); however, the underlying mechanism of this unique ML remains unclear. This study reports empirical and theoretical findings that confirm this ML is an electroluminescence (EL) of the ZnS:Cu phosphor induced by the triboelectricity generated at the ZnS:Cu microparticle-PDMS matrix interface. ZnS:Cu microparticles that exhibit bright ML are coated with alumina, an oxide with strong positive triboelectric properties; the contact separation between this oxide coating and PDMS, a polymer with strong negative triboelectric properties, produces sufficient interfacial triboelectricity to induce EL in ZnS:Cu microparticles. The ML of ZnS:Cu-PDMS composites varies on changing the coating material, exhibiting an intensity that is proportional to the amount of interfacial triboelectricity generated in the system. Finally, based on these findings, a mechanism that explains the ML of phosphor-polymer elastic composites (interfacial triboelectric field-driven alternating-current EL model) is proposed in this study. It is believed that understanding this mechanism will enable the development of new materials (beyond ZnS:Cu-PDMS systems) with bright and durable ML.
(© 2024 Wiley‐VCH GmbH.)
Databáze: MEDLINE
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