Two transitive AlxGa1-xP / GaP / Gayin1-yP photodiodes with a selective sensitivity in a vioelet and the middle of the ultraviolet band of the spectrum

Structures and photoelectric properties of two-transition hetero-photo-diode structures based on AlxGa1-xP ($0 \le x \le 0.6$) and GayIn1-yP ($0.6 \le y \le 0.7$), as well as their main parameters, are presented. It is shown that investigated heterophotodiodesstudied have a divided spectral response in the violet and ultraviolet (UV) bands of the spectrum, promising in the systems of absorption spectrophotometric analysis and control of burning of organic substances by a differential method.