|PROPOSAL NUMBER:||03-II T3.02-9919|
|PHASE-I CONTRACT NUMBER:||NNC04CA98C|
|RESEARCH SUBTOPIC TITLE:||Space Power and Propulsion|
|PROPOSAL TITLE:||Multijunction Ultralight Solar Cells and Arrays|
|SMALL BUSINESS CONCERN (SBC):||RESEARCH INSTITUTION (RI):|
|NAME:||EIC Laboratories, Inc.||NAME:||University of Florida|
|ADDRESS:||111 Downey Street||ADDRESS:||223 Grinter Hall, PO Box 115500|
|STATE/ZIP:||MA 02062-2612||STATE/ZIP:||FL 32611-5500|
|PHONE:||(781) 769-9450||PHONE:||(352) 392-1582|
PRINCIPAL INVESTIGATOR/PROJECT MANAGER
Krishna C. Mandal
U.S. Citizen or Legal Resident: Yes
TECHNICAL ABSTRACT (LIMIT 200 WORDS)
There is a continuing need within NASA for solar cells and arrays with very high specific power densities (1000-5000 kW/kg) for generating power in a new generation of ultralight space payloads. An emerging technology with promise to meet these ambitious goals are solar cells based on very thin films of discrete layers or interpenetrating networks (IPNs) of organic donors and acceptors. It is also recognized in the field of thin film inorganic solar cells, that it is possible to stack cells tuned to the blue, green and red portions of the solar spectrum, thus harvesting photons with less degradation of their energy. Theoretical efficiencies for multijunction solar cells are ~70% compared to ~30% for single junction devices. Indeed, these multijunction solar cells hold the current record for solar conversion efficiency. In this proposed joint STTR program between EIC Laboratories and the University of Florida, we will develop multijunction organic donor-acceptor solar cells as a means to achieve higher efficiencies than can be realized with single junction devices. Phase II will continue with development of high mobility, bandgap engineered organic donors and acceptors, as well as develop three junction devices and scaled up devices on lightweight flexible polymer substrates.
POTENTIAL NASA COMMERCIAL APPLICATIONS (LIMIT 100 WORDS)
NASA applications include power for microsatellites and planetary landers, and for powering adaptive optical flexible mirrors and antennas. Future needs include longterm power for deployed planetary exploration.
POTENTIAL NON-NASA COMMERCIAL APPLICATIONS (LIMIT 100 WORDS)
Commercially, the solar cells promise to be a lightweight and economical alternative to traditional photovoltaics, with projected cost of <$1/peak watt. The global energy photovoltaic market is growing rapidly, and is projected to be >$1 billion by 2010.