Patent ID: 11901473
Assignee: THE REGENTS OF THE UNIVERSITY OF MICHIGAN
Field: Semiconductors (Electrical engineering)
Classification: CPC H  C  G  Y | IPC C  G  H

Claim 4:
5. An optoelectronic device, comprising:
a substrate;
a reflecting layer configured to reflect thermal radiation and disposed on the substrate;
a thermophotovoltaic cell disposed on the reflecting layer, wherein the thermophotovoltaic cell is comprised of multiple device layers forming a p-n junction; and
a spacer layer disposed between the reflecting layer and the thermophotovoltaic cell, wherein the spacer layer includes one or more cavities which extend between the reflecting layer and the thermophotovoltaic cell, and the one or more cavities in the spacer layer are filled with air, wherein the spacer layer and reflector operate to reflect photons having energy less than band gap of materials comprising the thermophotovoltaic cell.