High Efficiency InAsSb / AlAsSb Quantum Dot Solar Cells

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA9550-10-C-0071
Agency Tracking Number: F09B-T20-0219
Amount: $99,999.00
Phase: Phase I
Program: STTR
Awards Year: 2010
Solitcitation Year: 2009
Solitcitation Topic Code: AF09-BT20
Solitcitation Number: 2009.B
Small Business Information
Magnolia Solar Inc.
52-B Cummings Park, Suite 311, Woburn, MA, 01801
Duns: 828761762
Hubzone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: Y
Principal Investigator
 Ashok Sood
 Principal Investigator
 (781) 503-1200
 aksood@magnoliasolar.com
Business Contact
 Yash Puri
Title: Executive Vice-President
Phone: (781) 503-1200
Email: yrpuri@magnoliasolar.com
Research Institution
 University of California
 Professor Diana Huffaker
 Department of Electrical Eng.
Box 951594
Los Angeles, CA, 90095
 (310) 825-9786
 Nonprofit college or university
Abstract
Magnolia Solar proposes to develop an innovative high efficiency single junction solar cell working with Prof. Diana Huffaker and her group and utilizing multi photon absorption in InAsSb/AlAsSb quantum dot solar cells. The proposed structure has unique qualities required by Intermediate band solar cell theory to achieve ultra high conversion efficiency. This system has a potential to achieve efficiencies over 50% under concentrated light conditions. The proposed structure has optimum band alignment as well as bandgap for Quantum dot and barrier materials. InAsSb QDs in AlAsSb barriers forms a type II band alignment which has long carrier life times and hence high carrier extraction efficiencies are possible. During the Phase I STTR effort, we will synthesize InAsSb dots with excellent structural and optical properties and demonstrate the technical feasibility of InAsSb Quantum Dot solar cells. Device simulation and modeling will help supplement the device optimization work. Our broad experience in band engineering, simulation and device design will help obtain optimum material properties needed for demonstrating multi-photon solar cells. BENEFIT: The terrestrial, Defense and Spacecraft power photovoltaic markets provide a significant commercial opportunity for the technology developed during this SBIR effort. The worldwide PV market generates over $4.5 billion (US) per year in revenue and has been growing at over 30% annually since the late 1990s. The emphasis on renewal energy and more of the defense energy needs will grow over the next decade and is expected to grow to over 100 Billion in the next ten years. Continued growth in the commercial PV market is currently being hampered by market down turn, while space-based PV systems will utilize technologies that improve radiation hardness, operating temperature range, efficiency, and specific power. Our technology development and commercialization strategy involves several distinct steps. Magnolia has detailed the tremendous long term benefits of increasing the efficiency of Solar cells for terrestrial applications. In addition use of the micro-concentrators also provides a means of inserting Quantum Dot-based solar cells with innovative nanostructured coatings into the renewable energy market.

* information listed above is at the time of submission.

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