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Two Noncentrosymmetric Bismuth Phosphates: Rational Design Synthesis and Optical Properties.

Jia-Ze Chen1, Yu Zhang1, Mingfeng Liu1

  • 1College of Materials, Xiamen University, Xiamen 361005, China.

Inorganic Chemistry
|August 25, 2023
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Summary
This summary is machine-generated.

Researchers developed novel noncentrosymmetric (NCS) alkaline earth metal bismuth phosphates. These materials exhibit ultraviolet nonlinear optical properties and photoluminescence, showing promise for advanced optical applications.

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Area of Science:

  • Materials Science
  • Solid-State Chemistry
  • Crystallography

Background:

  • Noncentrosymmetric (NCS) structures are crucial for nonlinear optical (NLO) and piezoelectric materials.
  • Designing novel NCS materials with desirable properties remains an active research area.

Purpose of the Study:

  • To synthesize and characterize new NCS alkaline earth metal bismuth phosphates.
  • To investigate their nonlinear optical (NLO) and photoluminescence properties.
  • To understand the relationship between ionic radius, structure, and NLO properties.

Main Methods:

  • Solid-state synthesis of BiCa(H0.5PO4)2 (CaBiPO) and BiSr(H0.5PO4)2 (SrBiPO) and their solid solutions.
  • Crystallographic analysis to determine the space group (C2).
  • Characterization of ultraviolet nonlinear optical (NLO) properties, including second-harmonic generation (SHG).
  • Photoluminescence studies of Eu3+-doped SrBiPO samples.

Main Results:

  • Successfully synthesized CaBiPO, SrBiPO, and their solid solutions, all crystallizing in the NCS space group C2.
  • Both CaBiPO and SrBiPO demonstrated ultraviolet NLO properties with type-II phase matching for SHG.
  • Eu3+-doped SrBiPO samples exhibited orange light emission, indicating potential as photoluminescence hosts.
  • The study detailed the influence of Ca2+ and Sr2+ ionic radii on structural modifications and NLO behavior.

Conclusions:

  • The partial substitution of Bi3+ with Ca2+ or Sr2+ ions is an effective strategy for designing novel NCS alkaline earth metal bismuth phosphates.
  • These new materials possess significant ultraviolet NLO properties and photoluminescence capabilities.
  • The findings provide insights into structure-property relationships, guiding the development of advanced functional materials.