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Effective Long Afterglow Amplification Induced by Surface Coordination Interaction.

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  • 1School of Materials Science and Engineering, Chongqing University of Technology, Chongqing, 400054, China.

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Summary
This summary is machine-generated.

Researchers developed a new red long-persistent luminescent (LPL) material using organic-inorganic hybrids. This novel red LPL material significantly enhances afterglow intensity, luminance, and duration for improved lighting applications.

Keywords:
afterglow amplificationlong-persistent luminescencelow-vision lightingorganic-inorganic hybridsurface coordinationtriplet energy transfer

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Area of Science:

  • Materials Science
  • Photochemistry
  • Solid State Chemistry

Background:

  • Long-persistent luminescent (LPL) materials exhibit afterglow, enabling applications in lighting and displays.
  • Red LPL materials lag in performance compared to green and blue counterparts, necessitating new material development.
  • Organic-inorganic hybrids offer tunable properties for advanced luminescent materials.

Purpose of the Study:

  • To develop a novel red LPL material with enhanced performance.
  • To investigate the use of organic ligands as energy transfer antennas for inorganic phosphors.
  • To explore applications in flexible lighting and wearable devices.

Main Methods:

  • Synthesized organic-inorganic hybrid material (R@TCPP) using a one-step coordination method.
  • Utilized 1,3,6,8-Tetrakis(4-carboxyphenyl)pyrene (TCPP) as an organic ligand coordinated to Sr0.75 Ca0.25 S:Eu2+ (R).
  • Incorporated R@TCPP into a high-density polyethylene (HDPE) matrix to create flexible films for a sound-controlled afterglow lamp.

Main Results:

  • TCPP acted as an antenna, facilitating energy transfer to the red phosphor via triplet energy transfer (TET).
  • Achieved a twofold increase in initial afterglow intensity and a onefold increase in luminance.
  • Extended the afterglow duration from 9 to 17 minutes.
  • Successfully fabricated a flexible film demonstrating sound-controlled afterglow.

Conclusions:

  • The developed organic-inorganic hybrid strategy effectively enhances red LPL material performance.
  • The R@TCPP material shows significant potential for flexible large-area luminescence, wearables, and low-vision lighting.
  • This approach offers a viable pathway for creating advanced red persistent phosphors.