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Delta commercializing Spectrolab's high efficiency cells

March 9, 2007 - by Dallas Kachan, Cleantech Group

Delta Electronics of Taiwan has developed a manufacturing process for modules using the high efficiency solar cells recently developed by Spectrolab (see Spectrolab solar cell breaks 40% efficiency barrier.)

Delta's new concentrating photovoltaic (CPV) modules will boast greater than 35% efficiency, the company said. Spectrolab's new cells have demonstrated up to 40.7% efficiency in the lab.

By contrast, the best performing conventional commercial silicon PV panels today barely reach 22% efficiency.

Spectrolab, Inc., a subsidiary of Boeing, is the world leader in highly efficient concentrator solar cells.

Delta collaborated closely with several leading companies in the field, including Spectrolab, to develop a viable assembly process that solves difficult to address issues such as material suitability, heat dissipation and hot spot formation.

Spectrolab is to qualify the new assembly process according to IEC (International Electrotechnical Commission) standards of CPV receivers and modules.

Delta has completed the development work for the assembly process, which is currently being evaluated by Spectrolab and is to be qualified as part of Spectrolabs efforts to demonstrate the robustness of the solar cell receiver assembly under high concentration.

We believe that the solar cell receiver assembly process developed by Delta will enable Spectrolab to offer its customers the opportunity to obtain a complete receiver design that has been proven reliable, thus enabling our customers to speed up their entry into the CPV market, said Dr. Raed Sherif, General Manager of the terrestrial photovoltaic products at Spectrolab. Spectrolab will continue to focus its efforts on developing next generation high-efficiency solar cells, and on increasing factory production capacity in order to improve the overall system economics.

Spectrolab's expertise in space photovoltaic products helps it fabricate multijunction solar cells optimized for the terrestrial spectrum.

Some industry experts believe high-efficiency multijunction solar cells in a high-concentration photovoltaic (HCPV) module offers the best opportunity to bring down the cost of solar energy, making it a commercially viable option for providing electricity.

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