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PyroDelta Energy, a subsidiary of First Tellurium, is working on a tellurium-based thermoelectric film designed to extend electricity generation from solar panels after dark. The film is intended to attach to the back of standard photovoltaic panels without changing their design or supporting infrastructure. It would generate electricity from temperature differences between the panel surface and its surroundings, including heat radiated from the ground. PyroDelta estimates the film’s efficiency at 11% to 12%, compared with 20% to 22% for conventional solar panels. The company said the technology is meant to complement, not replace, photovoltaic generation. The film remains in the early stages of development, and its estimated performance has not yet been commercially demonstrated.
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