Photovoltaic Cells for Very High Altitude Very Long Endurance Solar Aircraft

Award Information
Agency: Department of Defense
Branch: Defense Advanced Research Projects Agency
Contract: W31P4Q-07-C-0322
Agency Tracking Number: 07SB2-0623
Amount: $99,000.00
Phase: Phase I
Program: SBIR
Awards Year: 2007
Solicitation Year: 2007
Solicitation Topic Code: SB072-043
Solicitation Number: 2007.2
Small Business Information
6457 Howard Street, Niles, IL, 60714
DUNS: 135553472
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Noren Pan
 President
 (847) 588-3001
 npan@mldevices.com
Business Contact
 Noren Pan
Title: President
Phone: (847) 588-3001
Email: npan@mldevices.com
Research Institution
N/A
Abstract
The significance of the innovation in this Phase I SBIR is the development of a technology which will enable the manufacture of a light weight, low cost cost , multi-band gap compound semiconductor material containing high efficiency compound semiconductor multijunction solar cells suitable for deployment for in very high altitude, very long endurance (HALE) solar solar aircraft. This will be accomplished by applying a production production-worthy Epitaxial epitaxial Lift lift-off (ELO) process to a multi- band gap junction solar cell structure fabricated on a large area GaAs substrates. These efficient solar cell structures will be removed from the substrate in the form of a thin film and will be attached to lightweight, flexible carriers suitable for mounting on an aircraft wing. Low cost can be achieved due to the recycling of the GaAs substrate after the lift-off is performed Our focus will be focus will be given to GaAs-based solar cells and , in particular lattice-matched and highly disordered InGaP materials, because of the demonstrated efficiency of these structures. We will provide a clear path towards realizing develop a solar cell design capable of >30% efficiency target under AMAir Mass 1.5 illumination at 1 sun conditions. We will also define design a process where by which thin epitaxial layers will be transferred onto very a flexible conductive or non-conductive substrates. The resulting solar cell structures are expected to have an array mass density of <325 g/m2, and to be capable of operating for long durations in a 60 knot airflow at 100,000 feet.

* Information listed above is at the time of submission. *

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