Photodiode comprising several closely spaced photosensitive elements - has substrate layer, first absorption layer and complementary layer of smaller bandwidth divided into photosensitive elements

摘要

Photochloride comprises at least two photosensitive elements very close together of the type consisting of a semiconductor substrate an absorption layer consisting of a first semiconducting layer and a complementary second semiconducting layer, with a forbidden energy band larger than that of the first layer, of compsn. respectively GaxAl(1-x)As; GayAl1-yAs, where x is at least 0.9 and y is at least 0.65 but less than x. The diode exhibits an excellent decoupling between the photoelectric effects of the different elements, i.e. an absence of diaphoty.