Spire Corp.’s wholly owned subsidiary, Spire Semiconductor, has announced that it has matched the current efficiency record for a concentrator solar cell. The record efficiency is available on a production-ready cell with a photoactive area of 1.0cm2.
“This is truly an achievement,” said Roger G. Little, chairman and CEO of Spire. “We have experienced continuous improvement in our proprietary cell processing design technology throughout the NREL contract. We are excited to have matched the current world record efficiency, and we have nearly four months remaining under the subcontract to surpass this level and achieve the target 42.5% efficiency. A more-efficient concentrator solar cell will provide a lower cost and more reliable source of solar-generated electricity.”
The NREL measured the efficiency of 41% at 500x suns concentrated sunlight. Spire Semiconductor began working with NREL early last year under a $3.7 million cost share subcontract for an 18-month period. The goal is to develop a triple-junction, gallium arsenide, 42.5% conversion efficient concentrator cell for CPV systems.