BIOLOGICAL COMPONENT DETECTION DEVICE

摘要

Provided is a biological component detection device whereby a biological component can be detected at a high sensitivity by using an InP-based photodiode in which dark current is reduced without using a cooling mechanism and the light receiving sensitivity is elevated to a wavelength of 1.8 µm or more. A biological component detection device wherein a light-receiving layer (3) has a multiple quantum well structure of a III-V group semiconductor, a p-n junction (15) is formed by selectively diffusing impurity elements in the light-receiving layer and the concentration of impurities in the light-receiving layer is not more than 5×1016/cm3, characterized in that an examination is conducted therein by receiving at least one light having a wavelength included in the absorption band of the biological component of 3 µm or less.