Novel laser system mimics sunlight to test solar cell efficiency

A laser-based instrument that generates artificial sunlight to help test solar cell properties, and find ways to boost their efficiency, has been developed by researchers. The novel system simulates sunlight well across a broad spectrum of visible to infrared light. More flexible than conventional solar simulators such as xenon arc-lamps or light-emitting diodes, the laser instrument can be focused down to a small beam spot -- with resolution approaching the theoretical limit -- and shaped to match any desired spectral profile.

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