Plasmon-Enhanced All Organic Ultraviolet Photodetectors with High Sensitivity and Long-Term Stability

However, challenges such as limited photoresponsivity, stability, and weak light detection have hindered their practical application. In this study, we report the fabrication of Au nanoparticles (NPs) on ITO glass substrates via one-step annealing, followed by the construction of Au NPs/Ph-BTBT-12/C60 UV photodetectors.

The incorporation of Au NPs results in an absorption enhancement of approximately 443.2%, , significantly improving the photoresponsivity performance of the device from 69.6 μA/W to 413.1 μA/W. The device demonstrates photoresponsivity across the solar-blind UV spectrum and partial visible light, while efficiently detecting weak light at intensities as low as 0.01 mW/cm². Notably, the photodetector retains its performance after two months, exhibiting excellent stability.