MULTIJUNCTION PHOTOVOLTAIC CELLS Russian patent published in 2013 - IPC H01L31/52 

FIELD: chemistry.

SUBSTANCE: disclosed is a photovoltaic device, having a first active layer capable of generating an electric signal as a result of absorption of light with a first wavelength by the first active layer, a second active layer capable of generating an electric signal as a result of absorption of light with a second wavelength by the second active layer, a first optical filter lying between the first and second active layers and capable of reflecting more light with a first wavelength than light with a second wavelength, and transmitting more light with a second wavelength than light with a first wavelength, and a first optical resonator which causes an increase in the amount of light with a first wavelength which is absorbed by the first active layer, wherein the first and second active layers are included in a set of active layers comprising at least three active layers having bandgaps, wherein the bandgaps of said set of active layers lie within at least about 1000 nm in wavelengths between about 450 nm and about 1750 nm. Also disclosed is one more version of the photovoltaic device and a method of making the photovoltaic device.

EFFECT: high efficiency.

47 cl, 37 dwg