NASA STTR 2012 Solicitation


PROPOSAL NUMBER: 12-2 T2.01-9819
RESEARCH SUBTOPIC TITLE: Space Power and Propulsion
PROPOSAL TITLE: An LED-Based, Laboratory-Scale Solar Simulator for Advanced 3, 4, 5 & 6 Junction Space Photovoltaic Power Systems

NAME: Angstrom Designs, Inc. NAME: University of California, Santa Barbara
STREET: 5551 Ekwill Street STREET: 3227 Cheadle Hall
CITY: Santa Barbara CITY: Santa Barbara
STATE/ZIP: CA  93111 - 2073 STATE/ZIP: CA  93106 - 2050
PHONE: (805) 876-4138 PHONE: (805) 893-8809

PRINCIPAL INVESTIGATOR/PROJECT MANAGER (Name, E-mail, Mail Address, City/State/Zip, Phone)
Mr. Casey Hare
PO Box 2032
Santa Barbara, CA 93120 - 4914
(805) 876-4138

CORPORATE/BUSINESS OFFICIAL (Name, E-mail, Mail Address, City/State/Zip, Phone)
Mr. Timothy Clark Halsey
5551 Ekwill Stret
Santa Barbara, CA 93111 - 2073
(805) 284-4535

Estimated Technology Readiness Level (TRL) at beginning and end of contract:
Begin: 5
End: 7

Technology Available (TAV) Subtopics
Space Power and Propulsion is a Technology Available (TAV) subtopic that includes NASA Intellectual Property (IP). Do you plan to use the NASA IP under the award?

TECHNICAL ABSTRACT (Limit 2000 characters, approximately 200 words)
As a result of significant technical effort, the Phase I was successful in delivering a solar simulator prototype that not only proved the initial concept but will significantly reduce future risk and increase our ability to deliver a fully-functional solar simulator in Phase II. The proposed innovation is an LED-based, laboratory-scale, solar simulator. The proposed innovation simulates AM0 response of single, dual, 3, 4, 5 and 6 junction solar cells by using an array of different wavelength LEDs in close proximity to the cell under test. The simulator is adjustable in spectral matching for selected wavelengths and Class A, the highest standard, for spatial uniformity and temporal stability. The solar simulator illuminates a square area 10 inches by 10 inches and includes optical sensors so that all metrics can be calibrated and validated automatically as needed.

Solar simulation is critical for all solar cell testing, and current simulators will not work for coming 4, 5 and 6 junction technologies. Because the vast majority of NASA missions rely on solar cells, this is critical, enabling test technology for future solar cells. While accurate solar simulation is critical to all solar cell missions, it is particularly important to missions requiring large amounts of power, such as solar electric propulsion (SEP) missions. Beyond NASA's needs, other members of the aerospace community, including solar cell manufacturers, test labs and research institutions, have a critical need for this capability which presents excellent commercialization opportunities after the Phase II maturation of the technology.

POTENTIAL NASA COMMERCIAL APPLICATIONS (Limit 1500 characters, approximately 150 words)
Solar simulation of advanced 4, 5 and 6 junction cells will benefit all NASA missions, particularly high power missions such as solar electric propulsion (SEP). Solar simulation of advanced cells will enable industry standard practices on near-future solar cells.
Additional applications include:
- Advanced solar cells not currently available, including SBT6J, IMM with greater than 6 junctions and cells with quantum dots
- Low intensity, low temperature (LILT) applications
- LED-based large area pulsed solar simulation (LAPSS)
- Class A AM0 spectral simulation using many more different LED wavelengths
- A true AM0 simulator via LED augmentation of lamp-based sources

POTENTIAL NON-NASA COMMERCIAL APPLICATIONS (Limit 1500 characters, approximately 150 words)
All of the potential NASA commercial applications also apply to non-NASA entities, including other government agencies, solar cell manufacturers, aerospace prime contractors, aerospace subcontractors and research institutions. Some of these applications include:
- 4" or 6" round illumination area LED-based solar simulators for measuring a single cell, or wafer
- 2" or 3" round illumination area LED-based solar simulator for measuring test cells and early research efforts into advanced photovoltaics
- Custom testing of advanced cells, including sensitivity studies to selectively current-starved junction testing, selectively current-flooded junction testing, reemission/ reabsorption of photons by neighboring junctions and many other tests as researchers see opportunity.
- AC modulation of LEDs enables standard AC modulation technique, such as noise reduction through AC modulation, cell capacitance measurements and non-contact I/V measurement of cells before frontside ohmic contacts are added.
- Terrestrial technologies, up to 6 junctions, could greatly benefit from the spectral control and flexibility of this instrument. All benefits listed above could apply to terrestrial cells as well, with the greatest benefit for multijunction cells.
- Some past partners in other projects have already expressed interest in investing in a potential Phase II-E for commercialization and scale-up into the market.

TECHNOLOGY TAXONOMY MAPPING (NASA's technology taxonomy has been developed by the SBIR-STTR program to disseminate awareness of proposed and awarded R/R&D in the agency. It is a listing of over 100 technologies, sorted into broad categories, of interest to NASA.)
Circuits (including ICs; for specific applications, see e.g., Communications, Networking & Signal Transport; Control & Monitoring, Sensors)
Hardware-in-the-Loop Testing
Lifetime Testing
Models & Simulations (see also Testing & Evaluation)
Nondestructive Evaluation (NDE; NDT)
Simulation & Modeling
Sources (Renewable, Nonrenewable)

Form Generated on 07-29-14 10:30