Solar-Blind Position-Sensitive Detectors Fabricated from β-Ga2O3/Polycrystalline Diamond Heterojunctions

Solar-blind detectors play important roles in military and civilian affairs, due to their high signal-to-noise ratio and low-false alarm rate. In recent years, wide-bandgap semiconductor-based solar-blind photodetectors have been studied extensively. However, very little attention has been paid to position detection of solar-blind light. Herein, a solar-blind position-sensitive detector (PSD) is fabricated from beta-Ga2O3/polycrystalline diamond heterojunctions. The solar-blind PSD shows good solar-blind response characteristics. In addition, the output signals of the PSD are dependent on the position of the solar-blind light spot, which can be utilized to realize position detection of solar-blind signals.