Enabling Durable Bottom Cell for Multi-Junction Thin-Film Photovoltaics

Award Information
Agency: Department of Defense
Branch: Missile Defense Agency
Contract: F29601-02-C-0191
Agency Tracking Number: 02-0393
Amount: $69,009.00
Phase: Phase I
Program: SBIR
Awards Year: 2002
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
8130 Shaffer Pkwy, Littleton, CO, 80127
DUNS: 040245305
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Lawrence Woods
 Senior Scientist
 (303) 285-5135
 lwoods@itnes.com
Business Contact
 Rick Halbach
Title: Vice Pres Business Devel
Phone: (303) 285-1739
Email: rhalbach@itnes.com
Research Institution
N/A
Abstract
"ITN Energy Systems, Inc. (ITN) intends to meet the requirements for future spacecraft power by developing >20% efficient photovoltaic (PV) cells on lightweight flexible substrates. ITN will achieve this goal using a two-terminal monolithic tandem(multi-junction) structure with thin-films of high-efficiency and radiation resistant copper indium diSelenide (CIS) and bandgap tunable CIS-alloys with Ga and/or Al. As an intermediate goal to this large endeavor, ITN will perform research anddevelopment on a durable bottom cell (low-bandgap) for the multi-junction device, which would survive the harsh processing conditions of the monolithically deposited top cell. This new photovoltaic device will avoid the CdS top heterojunction layer thatis typically associated with CIS-alloy devices, but that is responsible for degradation under top cell processing conditions. Several different pathways to achieving durable bottom cells will be investigated. The achievement of a 10% efficient durablebottom cell would be enabling for the multi-junction device and allow for several promising thin-film technologies as the wide-bandgap top cell. Light weight, flexible, high efficiency, long life, radiation resistant, durable thin film PV modules wouldquickly takeover the small and medium spacecraft power market due to their inherent low cost and high specific power (W/kg). Light weight, flexible, high efficiency, long life, radiation resistant, durable th

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

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