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Ultraviolet photodetector based on RbCu2I3microwire.

Hong-Xiang An1,2, Bao-Shi Qiao2, Zhi-Hong Zhang2,3

  • 1School of Applied Physics and Materials, Wuyi University, Jiangmen, Guangdong 529020, People's Republic of China.

Nanotechnology
|January 9, 2023
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Summary

Researchers synthesized high-quality RbCu2I3 microwires, a novel copper-based perovskite, using a fast-cooling method. This lead-free material shows promise for ultraviolet optoelectronics due to its excellent photoelectric properties.

Keywords:
RbCu2I3lead-free perovskitemicrowirephotodetectorultraviolet

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Area of Science:

  • Materials Science
  • Solid-State Physics
  • Optoelectronics

Background:

  • Copper-based halide perovskites offer lead-free alternatives with excellent optoelectronic properties.
  • The specific material RbCu2I3 has not been previously synthesized or studied.

Purpose of the Study:

  • To synthesize high-quality RbCu2I3 microwires (MWs).
  • To investigate the structural, optical, and photoelectric properties of RbCu2I3 MWs.
  • To explore the application of RbCu2I3 MWs in ultraviolet photodetection.

Main Methods:

  • Synthesis of RbCu2I3 MWs via a fast-cooling hot saturated solution method.
  • Structural characterization using X-ray diffraction.
  • Optical property analysis including absorption and photoluminescence spectroscopy.
  • Fabrication and testing of a single-microwire photodetector.

Main Results:

  • High-quality RbCu2I3 MWs with an orthorhombic structure were successfully synthesized.
  • The material exhibits a sharp UV absorption edge (3.63 eV band gap) and an ultra-large Stokes shift (300 nm).
  • The fabricated photodetector demonstrated excellent UV detection performance with a specific detectivity of 5.0 × 10^9 Jones and responsivity of 380 mA·W^-1 at 340 nm.

Conclusions:

  • The fast-cooling method is effective for synthesizing high-quality RbCu2I3 MWs.
  • RbCu2I3 possesses promising optoelectronic properties for UV applications.
  • This work provides a foundation for future research and development of RbCu2I3 in optoelectronics.