Researchers from the National Institute of Standards and Technology are looking to ambient lighting as a potential source of generating small amounts of power for the indoor charging of devices.
Andrew Shore and Behrang Hamadani used one lighting source, a white LED with a color coordinate temperature of 3,000 K and an illuminance of 1,000 lux — akin to normal brightness for indoor lights — to test three different modules: a gallium indium phosphide (GaInP) semiconductor; a gallium arsenide (GaAs) semiconductor; and a silicon (Si) semiconductor.
A ceiling light in an office environment would be enough to charge any of the tested mini modules, making them all viable as power sources for indoor batteries and sensors in an environment with adequate ambient light. Shore says the GaInP module would require the least amount of light and still maintain high efficiency.
The researchers are presenting their findings at Energy Storage and Conversion, an AIP Publishing Horizons virtual conference.
From American Institute of Physics
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