Solar-Blind Photodetector Based on NaTaO3/TiO2 Composite Film with Enhanced Photoelectric Performance

In this study, ultraviolet detectors based on NaTaO3/TiO2 were fabricated with enhanced detection performance towards solar-blind (200-280 nm) light. A TiO2 seed layer was introduced and served as a buffer layer between the fluorine tin oxide (FTO)-coated glass substrate and the TiO2 film, which increased the adhesion between them. The periodic stability and photoelectric characteristics of the detectors were studied and analyzed. The detectors showed a high performance when illuminated by 265 nm and 254 nm UV light. At -15 V bias, the dark current of the detector was only 70 pA. Under the bias of -15 V and the illumination of 254 nm, the maximum photo-to-dark current ratio reached 20, and the response time was less than 300 ms. Moreover, the detector exhibited a fast response time and remained very stable after numerous testing cycles. These results demonstrate the potential application of NaTaO3/TiO2 composites in UV detection.

Automated summary

Ultraviolet detectors based on NaTaO3/TiO2 showed enhanced detection performance towards solar-blind light, with high stability and photoelectric characteristics. The detectors demonstrated fast response time, high photo-to-dark current ratio under specific UV illumination, and remained stable after multiple testing cycles, indicating their potential application in UV detection.