CASCADE SOLAR BATTERY Russian patent published in 2017 - IPC H01L31/687 H01L31/256 H01L31/72 

FIELD: electricity.

SUBSTANCE: invention relates to electrical engineering, namely to cascade solar battery. Cascade solar battery is made together with first semiconductor solar battery, wherein first semiconductor solar battery has p-n transition from first material with first array constant, and to second semiconductor solar battery, wherein second semiconductor solar battery has p-n transition from second material with second array constant, and first array constant is less than than second array constant, and cascade solar battery has metamorphic buffer, wherein metamorphic buffer includes sequence of first, lower layer AlInGaAs or AlInGaP, and second, middle layer AlInGaAs or AlInGaP, and third, upper layer AlInGaAs or AlInGaP; and metamorphic buffer is formed between first semiconductor solar battery and second semiconductor solar battery, and metamorphic buffer array constant varies along thickness (in thickness axis) of metamorphic buffer; and wherein between at least two layers of metamorphic buffer array constant and indium content increase, and aluminium content decreases.

EFFECT: reduction of residual voltage in solar battery, as well as improvement of its efficiency is technical result of invention.

14 cl, 7 dwg