Patent ID: 9741882
Date: 2017-08-22
CPC Classifications: H01L,Y02E

Claim:
1. A photovoltaic cell, comprising: a first p-n junction layer having a first energy band gap between a valence band and a conduction band of said first p-n junction layer; a second p-n junction layer having a second energy band gap between a valence band and a conduction band of said second p-n junction layer, said first energy band gap being greater than said second energy band gap; a tunnel junction layer positioned between said first and second p-n junctions; a plurality of quantum dots having a distribution confined to a surface of an n-doped layer and/or a p-doped layer of at least said first p-n junction layer; a first electrical conductor layer contiguous with said first p-n junction layer; and a second electrical conductor layer contiguous with said second p-n junction layer.