SENSOR OF CHEMICAL COMPOSITION Russian patent published in 2021 - IPC G01J3/00 H01L31/02 

FIELD: photonics.

SUBSTANCE: invention relates to photonics, in particular to methods and devices for analyzing the chemical composition of matter (air, liquids and solids). The sensor of chemical composition of a substance contains at least one first semiconductor structure (1) with a p-n junction (2) and at least one second semiconductor structure (3) with a p-sn junction (4), optically coupled and spaced apart on a transparent in the operating wavelength range of the substrate (5), the sensitive area (6) for placing the test substance located on the back side of the substrate (5), and electrical contacts (8), (9) and (10) formed respectively on the p-layer and on the n-layer, respectively, of the first (1) and second (3) semiconductor structure. The first semiconductor structure (1) is made in the form of an optical radiation source, and the second semiconductor structure (3) is made in the form of a photodetector. Semiconductor structures (1), (3) are fixed on the substrate (5) with adhesive (15), transparent in the operating wavelength range.

EFFECT: chemical composition sensor works in a wide range of lengths, which provides a wide range of applications.

4 cl, 7 dwg