Power Generation

Cooling Mechanism Increases Solar Energy Harvesting for Self-Powered Outdoor Sensors

Thermoelectric devices, which use the temperature difference between the top and bottom of the device to generate power, offer some promise for harnessing naturally occurring energy. In Applied Physics Letters, authors tested a device made up of a wavelength-selective emitter that constantly cools the device during the day using radiative cooling. As a result, the top of the device is cooler than the bottom, causing a temperature difference that creates constant voltage through day and night and various weather conditions.