A filterless organic photodetector electrically switchable between visible and infrared detection

Wavelength tunable detectors are essential for capturing spectral information within diverse applications such as those related to object recognition and identification. Here, we present a generalizable design compact dual-band photodetector based on the integration of two back-to-back organic photodiodes that respond visible (400–700 nm) infrared light (700–1,400 nm). The polarity under external bias provides electronic switch between detection modes. Operating at low voltage <1 V, exhibits fast response with −3-dB cutoff frequency 18 kHz specific detectivity 7.8 × 109 Jones. device contactless measurements high temperatures originated from blackbody radiation spectroscopic imaging