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Photoluminescence: Applications01:14

Photoluminescence: Applications

Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
Photoluminescence: Fluorescence and Phosphorescence01:23

Photoluminescence: Fluorescence and Phosphorescence

Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...

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A Novel Technique for Generating and Observing Chemiluminescence in a Biological Setting
08:57

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Published on: March 9, 2017

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

Jianwen Zhang1, Weiguang Wang1, Jinyu Zhou1,2,3

  • 1National & Local Joint Engineering Laboratory for Optical Conversion Materials and Technology, Lanzhou University, Lanzhou, P. R. China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|June 30, 2026
PubMed
Summary
This summary is machine-generated.

Researchers developed a new method to enable inactive phosphors to exhibit self-recoverable mechanoluminescence (ML). This breakthrough strategy uses assisting contact electrification, potentially making ML a universal property for all phosphors.

Keywords:
LaPO4: Tb3+, Ce3+contact electrificationphosphorself‐recoverable mechanoluminescence

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Area of Science:

  • Materials Science
  • Solid-State Physics
  • Luminescence

Background:

  • Self-recoverable mechanoluminescence (ML) is rare, limited to specific active phosphors.
  • Existing ML excitation methods include piezoelectricity and contact electrification.
  • Many phosphors lack inherent ML properties.

Purpose of the Study:

  • To develop a strategy for inducing self-recoverable ML in inactive phosphors.
  • To demonstrate a novel assisting contact electrification method.
  • To expand the applicability of ML in smart devices.

Main Methods:

  • Introduced an assisting contact electrification strategy.
  • Incorporated strongly electrifiable fluoride into polydimethylsiloxane (PDMS).
  • Utilized LaPO4: Tb3+, Ce3+ phosphor as a model system.

Main Results:

  • Successfully induced self-recoverable ML in LaPO4: Tb3+, Ce3+ phosphor, which lacks inherent ML.
  • Demonstrated that Tb3+ emission was assisted by contact electrification within PDMS.
  • Showcased the potential for ML to become a universal property.

Conclusions:

  • The assisting contact electrification strategy enables inactive phosphors to achieve self-recoverable ML.
  • This approach broadens the scope of materials capable of ML.
  • The findings pave the way for widespread ML applications in sensing and displays.