CONCENTRATOR MULTISTAGE PHOTOCONVERTER Russian patent published in 2014 - IPC H01L27/14 

FIELD: physics.

SUBSTANCE: invention relates to semiconductor photoconverters, particularly concentrator multistage solar cells which convert concentrated solar radiation into electrical energy. The concentrator multistage photoconverter has a substrate (1) p-Ge, in which is formed a lower p-n junction (2), and, successively grown on the substrate, a nucleation layer (3) n-Ga_0.51In_0.49P, a buffer layer (4) n-Ga_0.99In_0.01As, a lower tunnel diode (5), a middle p-n junction (9), having a base layer (10) an emitter layer (11), as well as a wide-band gap window (12), an upper tunnel diode (13), an upper p-n junction (14), having a rear potential barrier layer (15), a base layer (16) and emitter layer (17), as well as a wide-band gap window (18), and a contact n⁺-sublayer (19) The lower tunnel diode has an n-wide band gap layer (6), an n⁺⁺-tunnel layer (7) and a p⁺⁺-tunnel layer (8), directly adjacent to the base layer (10) of the middle p-n junction (9).

EFFECT: invention reduces series resistance of the concentrator multistage photoconverter in order to increase efficiency of converting highly concentrated solar radiation.

5 cl, 7 dwg