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Solar-Blind Self-Powered Photodetector Using Solution-Processed Amorphous Core-Shell Gallium Oxide Nanoparticles.

Somak Mitra1, Yusin Pak1, Bin Xin1

  • 1Physical Sciences and Engineering Division , King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900 , Saudi Arabia.

ACS Applied Materials & Interfaces
|September 10, 2019
PubMed
Summary
This summary is machine-generated.

Researchers developed novel amorphous gallium oxide nanoparticles for cost-effective, solution-processed deep ultraviolet (DUV) photodetectors. These devices exhibit the highest responsivity to date, enabling potential industrial applications.

Keywords:
DUV Schottky photodetectorfemtosecond laser ablationgallium oxide nanoparticlesolar-blindnesswide bandgap oxide semiconductors

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Optoelectronics

Background:

  • Deep ultraviolet (DUV) photodetectors are crucial for various applications.
  • Wide band gap oxide semiconductors (WBGS) offer potential for cost-effective DUV detection.
  • Solution-processed devices are desirable for large-scale manufacturing.

Purpose of the Study:

  • To synthesize novel core-shell amorphous gallium oxide nanoparticles (NPs).
  • To investigate the properties of these amorphous gallium oxide NPs.
  • To demonstrate their application in high-performance DUV photodetectors.

Main Methods:

  • Femtosecond laser ablation in liquid technique for NP synthesis.
  • Transmission electron microscopy and electron energy-loss spectroscopy for structural analysis.
  • Time-resolved spectroscopy and photoluminescence for optical characterization.

Main Results:

  • Successfully synthesized novel core-shell amorphous gallium oxide NPs (a-Ga2O3/Ga2O NPs).
  • Confirmed amorphous NP nature with a Ga-rich core and oxide-rich shell.
  • Achieved high responsivity (778 mA/W) at 244 nm in a solar-blind DUV photodetector.

Conclusions:

  • The synthesized amorphous gallium oxide NPs are suitable for high-performance DUV photodetectors.
  • Solution-processed WBGS photodetectors show promise for industrial applications.
  • This work advances the development of cost-effective DUV detection technologies.