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An Assisting Contact Electrification Strategy for Achieving Self-Recoverable Mechanoluminescence.

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Interfacial Interaction Modulated Radiation Defects for Self-Charging Persistent Mechanoluminescence.

Yingjuan Yan1,2,3, Bo Zhou1, Ziyi Guo1,2,3

  • 1Shandong Laboratory of Advanced Materials and Green Manufacturing at Yantai, Yantai, Shandong, 264006, P. R. China.

Small (Weinheim an Der Bergstrasse, Germany)
|August 18, 2025
PubMed
Summary

This study reveals the mechanism behind self-charging persistent mechanoluminescence (SC-PML) using a novel phosphor. The findings clarify how mechanical stress creates luminescence centers, enabling advanced stress sensing applications.

Keywords:
anti‐counterfeitingpersistent mechanoluminescenceradiation defectself‐chargingstress visualization

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Area of Science:

  • Materials Science
  • Solid State Physics
  • Luminescence

Background:

  • Self-charging persistent mechanoluminescence (SC-PML) offers extended stress observation windows and convenient operation.
  • The fundamental physical principles governing SC-PML remain largely unexplored.

Purpose of the Study:

  • To elucidate the underlying mechanisms of SC-PML.
  • To develop and characterize a novel material exhibiting SC-PML for practical applications.

Main Methods:

  • Incorporation of a Dy3+-doped Sr9LiMg(PO4)7 phosphor into a polydimethylsiloxane matrix.
  • Investigation of SC-PML properties through mechanical stimuli and photoluminescence measurements.
  • Analysis of multi-mode stimuli/irradiation effects on the material's luminescence.

Main Results:

  • Repeatable SC-PML was observed for up to 30 seconds in the developed material.
  • A divergence between SC-PML and transient photoluminescence indicated mechanics-induced trap creation.
  • A high-energy interfacial process, analogous to X-ray irradiation, was identified as responsible for generating trapping centers.

Conclusions:

  • The study provides significant insights into the fundamental mechanisms of SC-PML.
  • The developed SC-PML material demonstrates potential for multi-mode anti-counterfeiting and stress-sensing devices.