Nanotechnology Now - Press Release: 'Conductive ink' solar panels capture sun power for soldiers

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Plexcore® technology, depicted here, allows solar cells to form-fit soldiers’ uniforms to power GPS components and communication devices, and could also be used to “print” solar panels onto thin films incorporated into military tents. Commercial applications include solar energy batteries for cell phones, radios, and other portable devices. (U.S. Air Force photo)

Abstract:
Scientists at the Air Force Research Laboratory Materials and Manufacturing Directorate (AFRL/RX), in a concerted effort with Plextronics, Inc., and the Pennsylvania NanoMaterials Commercialization Center, both located in Pittsburgh, Pa., developed a ready-to-use, cost-reducing technology that can capture sunlight and store it as energy to power Global Positioning System components, portable communications, and other devices for U.S. soldiers.

'Conductive ink' solar panels capture sun power for soldiers

Wright-Patterson Air Force Base, OH | Posted on July 14th, 2009

According to 2nd Lt. Christopher A. Vaiana of the Directorate's Nonmetallic Materials Division, AFRL/RX provided guidance and funding to develop a special "conductive ink" that can be used to make printed organic photovoltaic solar cell panels on very thin, flexible surfaces using ink-jet printing. This new technology, called Plexcore®, developed and manufactured by Plextronics, allows solar cells to form-fit soldiers' uniforms. It can also be used to print solar panels onto thin films in military tents, Lieutenant Vaiana said.

The agreement between AFRL/RX and the Commercialization Center includes the development of a technology roadmap identifying technologies AFRL/RX needs and is interested in funding. The Center is responsible for reporting these needs to industry and requesting proposals. Next, a team of personnel representing both organizations carefully examines the proposals and indentifies those with the most promise to receive funding, Lieutenant Vaiana explained.

The agreement has already resulted in the successful program with Plextronics, whose primary focus is organic solar cell and organic light emitting diodes, and more specifically, the conductive inks and process technologies that enable such applications, he pointed out.

"Solar power and solid-state lighting offer substantial promise as approaches toward the development of practical alternative energy technology," Lieutenant Vaiana stated. "Combined with the low-cost manufacturing methods of printed electronics, solar and solid-state lighting panels could become economical and environmentally compatible solutions to current day and future energy challenges.

"Military and commercial operations demand portable, highly efficient power sources. Using the power provided by natural sunlight via solar cells is an attractive option, yet has thus far been restricted by cost and size," Lieutenant Vaiana continued.

"Plextronics' new technology represents a significant step forward in printing inexpensive solar cells capable of powering a wide range of portable devices such as cell phones and radios. Key outcomes include lower costs and reduced logistical footprints for military operations across the battlefield environment," he added.

Plexcore® has some important advantages over today's silicon-based solar cell panels, including highly substantial cost reduction: approximately $50 per square meter versus $500 per square meter for silicon-based panels, Lieutenant Vaiana explained.

"The technology has won best-in-class recognition for unmatched solar power efficiency. The research and development effort has also helped streamline the manufacturing process for printed OPV devices, resulting in reduced costs and trimmed production times. Compared to other organic photovoltaic materials, Plexcore® offers world-class efficiency," he said.

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About Air Force Research Laboratory Materials and Manufacturing Directorate
Wright-Patterson Air Force Base (IATA: FFO, ICAO: KFFO, FAA LID: FFO) is a United States Air Force base located in Greene and Montgomery counties, eight miles (13 km) northeast of the central business district of Dayton, Ohio, United States. Part of the base is located along the city limits of Riverside and is also adjacent to Fairborn and Beavercreek. The base is named after the Wright brothers, who used the Huffman Prairie portion of what became Wright-Patterson as their testing ground, and Frank Stuart Patterson, son and nephew of the co-founders of National Cash Register, who was killed on June 19, 1918, in the crash of his Airco DH.4 at Wilbur Wright Field.

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