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Lanthanide and Ladder-Structured Polysilsesquioxane Composites for Transparent Color Conversion Layers.

Jaehyun Han1,2, Darya Burak1,3, Valeriia Poliukhova1

  • 1Materials Architecturing Research Center, Korea Institute of Science and Technology, 5 Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, Republic of Korea.

Materials (Basel, Switzerland)
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Summary

Ladder-type polysilsesquioxanes (LPSQs) with lanthanide metals create transparent films for display color conversion. These hybrid materials offer enhanced luminescence, transmittance, and durability for advanced display technologies.

Keywords:
color conversion layerladder-structuredlanthanidepolysilsesquioxanetransparent film

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Area of Science:

  • Materials Science
  • Optoelectronics
  • Polymer Chemistry

Background:

  • Ladder-type polysilsesquioxanes (LPSQs) offer high refractive index and film-forming properties.
  • Transparent color conversion layers are crucial for advanced display technologies.
  • Lanthanide ions (Europium, Terbium) provide luminescence for color generation.

Purpose of the Study:

  • To develop transparent color conversion films using LPSQs and lanthanide metals.
  • To investigate the optical and mechanical properties of LPSQ-lanthanide composites.
  • To evaluate the potential of these hybrid materials for display applications.

Main Methods:

  • Synthesis of LPSQs with phenyl and epoxy units.
  • Fabrication of transparent composite films with Europium (Eu(III)) and Terbium (Tb(III)).
  • Characterization using FT-IR, X-ray photoelectron spectroscopy, and nanoindentation tests.

Main Results:

  • LPSQ-lanthanide films exhibited tunable emission colors (red, orange, yellow, green).
  • High luminescence and transmittance were observed due to chelating and light sensitization effects.
  • Improved epoxy conversion, hardness, adhesion, and corrosion resistance were achieved.

Conclusions:

  • LPSQ-lanthanide hybrid materials are suitable for transparent color conversion layers in displays.
  • The material demonstrates excellent optical and mechanical properties for display applications.
  • This work presents a promising approach for next-generation display color conversion.