Patent ID: 9368662
Filing Date: 2016-06-14
CPC Classification: B82Y,H01L,Y02E

Claim Text:
1. A monolithic photovoltaic junction for a solar cell, comprising: first and second oppositely doped semiconductor regions; an intrinsic region disposed between the first and second oppositely doped semiconductor regions, the intrinsic region having an actual lattice size and comprising quantum wells of first and second types and barriers separating each of the quantum wells, the quantum wells of the first type being formed of one or more materials having a lattice constant less than the actual lattice size of the intrinsic region, and the quantum wells of the second type being formed of one or more materials having a lattice constant greater than the actual lattice size of the intrinsic region; and a distributed Bragg reflector, formed of alternate lavers of a semiconductor material of differing refractive indices and disposed adjacent to at least one of the first or the second oppositely doped semiconductor regions, for reflecting light, unabsorbed by the quantum wells, towards the quantum wells.