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Related Experiment Video

Updated: May 1, 2026

A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy
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Defect-Rich Wide Bandgap Li2ZrO3 Engineered for Multiple Functionalities through a Cation Doping Scheme.

Inderjeet Singh1, Sachin Pal1, Sitharaman Uma1

  • 1Materials Chemistry Group, Department of Chemistry, University of Delhi, Delhi 110007, India.

Inorganic Chemistry
|August 19, 2025
PubMed
Summary
This summary is machine-generated.

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Imperfections in Crystal Structure: Stoichiometric Point Defects01:26

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Schottky defects arise when some lattice points in a crystal, such as those in NaCl, remain unoccupied, creating lattice vacancies without disturbing the overall electrical neutrality of the crystal. This defect is common in ionic crystals where the positive and negative ions are similar in size, as seen in sodium chloride and cesium chloride. The presence of Schottky defects enables the crystal to conduct electricity to a small extent through an ionic mechanism. Electric fields cause nearby...
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This study engineered defect-rich Li₂ZrO₃ using Tb⁴⁺/Eu³⁺ doping, creating a versatile multifunctional optical material. Doping modulated electronic structure, enhancing photocatalytic activity and tunable luminescence for advanced technologies.

Area of Science:

  • Materials Science
  • Solid State Chemistry
  • Photocatalysis

Background:

  • Growing demand for multifunctional materials in advanced technologies.
  • Need for novel materials with tunable electronic and optical properties.
  • Defect-rich Li₂ZrO₃ as a promising host material.

Purpose of the Study:

  • To investigate cation-induced electronic structure modulation in defect-rich Li₂ZrO₃.
  • To explore the effects of Tb⁴⁺ and Eu³⁺ doping on Li₂ZrO₃ properties.
  • To engineer Li₂ZrO₃ for multifunctional optical applications.

Main Methods:

  • Ceramic method: high-temperature solid-state reaction.
  • Structural analysis: Powder X-ray Diffraction (PXRD) and Raman spectroscopy.
  • Spectroscopic and electronic characterization: absorption/emission spectroscopy, Electron Paramagnetic Resonance (EPR), X-ray Photoelectron Spectroscopy (XPS).

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Last Updated: May 1, 2026

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Main Results:

  • Tb⁴⁺ doping reduced the optical bandgap from 5.45 to 2.46 eV, inducing yellow color and intrinsic luminescence.
  • 10 mol % Tb-doped Li₂ZrO₃ showed efficient photocatalytic degradation of crystal violet (CV) under visible light.
  • Eu³⁺ doping resulted in excitation-dependent tunable emissions (red, blue, white).
  • Proton exchange was observed in doped samples, leading to partial reduction of Tb⁴⁺ to Tb³⁺.

Conclusions:

  • Defect-rich Li₂ZrO₃ can be engineered into a versatile, multifunctional optical material via cation doping.
  • Tb⁴⁺ and Eu³⁺ doping effectively modulate electronic structure and optical properties.
  • The developed materials show potential for photocatalysis and tunable luminescence applications.