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RF-Sputtered β-Ga2O3 Thin Films for Solar-Blind UV Detection: Progress, Challenges, and Future Perspectives.

Pramod Mandal1, Shagolsem Romeo Meitei2, Anand Pandey3

  • 1Department of Graphic Arts and Photophysics, Faculty of Chemical Technology, University of Pardubice, 532 10 Pardubice, Czech Republic.

Materials (Basel, Switzerland)
|May 27, 2026
PubMed
Summary
This summary is machine-generated.

Physical vapour deposition (PVD) radiofrequency (RF) sputtering enables high-quality beta-gallium oxide (β-Ga2O3) thin films for solar-blind ultraviolet photodetectors. Optimizing deposition and post-processing parameters is key for next-generation optoelectronic devices.

Keywords:
PVD RF magnetron sputteringoptoelectronicssolar-blind UV photodetector (SB-UVPDs)wide bandgap semiconductorβ-Ga2O3

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Area of Science:

  • Materials Science
  • Optoelectronics
  • Semiconductor Physics

Background:

  • Beta-gallium oxide (β-Ga2O3) is a promising wide-bandgap semiconductor for advanced optoelectronic applications.
  • Solar-blind ultraviolet photodetectors (SB-UVPDs) require high-performance materials for reliable detection in specific UV ranges.

Purpose of the Study:

  • To review recent advancements in PVD RF-sputtered β-Ga2O3 thin films for SB-UVPDs.
  • To evaluate the influence of deposition and post-treatment parameters on film properties and device performance.

Main Methods:

  • Comprehensive review of physical vapour deposition (PVD) radiofrequency (RF) sputtering techniques.
  • Analysis of various photodetector architectures and β-Ga2O3 material characteristics.
  • Evaluation of deposition parameters (power, pressure, time, distance, temperature) and post-deposition treatments (annealing, doping).

Main Results:

  • PVD RF sputtering offers a controllable method for fabricating high-quality β-Ga2O3 thin films.
  • Deposition and post-processing parameters significantly impact film crystallinity, morphology, optical quality, and electrical performance.
  • Optimized parameters lead to enhanced optoelectronic performance in SB-UVPDs.

Conclusions:

  • PVD RF magnetron sputtering is a versatile technique for β-Ga2O3 SB-UVPD fabrication.
  • Careful optimization of parameters allows tuning of optoelectronic performance for next-generation systems.
  • β-Ga2O3-based SB-UVPDs show great potential for integration into advanced optoelectronic and photonic systems.