An ultra-violet and infrared dual-band photodetector using a GaO thin film and HgTe colloidal quantum dots.

Dual-band photodetection of ultraviolet (UV) and infrared (IR) light is an advanced technology aimed at simultaneously or selectively detecting signals from these two distinct wavelength bands. This technique offers broad application prospects, particularly in environments requiring multispectral information. In this work, a solar-blind UV photodetector made from an amorphous GaO (a-GaO) thin film was combined with a short-wave infrared photodetector made from a HgTe colloidal quantum dot (CQD) film.