Meet the Bizarre Night Solar Cell That Generates Energy Through An Inverse Process of Conventional Solar Panels

A University In Australia Is Working On A Solar Cell That Promises To Revolutionize Clean Energy Production

With climate change, investments in the development of new clean energy production technologies are increasing. One example is the study released by the ACS Photonics from the University of New South Wales (UNSW), Australia, where researchers are working on a solar cell capable of producing energy at night. This involves the “inverse operation of a conventional solar cell,” which would be capable of producing up to one-tenth of a conventional photovoltaic cell.

Energy Production From Infrared Thermal Radiation 

In a conventional solar panel, sunlight is absorbed by the solar panels and converted into electricity. The study shows that the same process can occur in reverse, where heat loss is exploited. As the Earth cools at night, it radiates energy into space. Researchers leverage this movement to generate electricity. 

The device being developed by researchers is called a Thermoradiative Diode. Basically, the equipment operates in the inverse manner of a conventional solar panel. 

“The idea that thermodynamically we can produce energy through the emission of light rather than absorption may seem impossible to many. Much like a solar cell, what we have here is a thermal engine, with the difference of switching the energy converter from the cold side (solar cell being on Earth absorbing photons from the Sun) to the hot side”, said Michael Nielsen, professor and researcher at the School of Photovoltaic and Renewable Energy Engineering at UNSW. 

Energy Production Capacity 

During tests, one of the tested photovoltaic detectors heated up to 21.11 degrees Celsius, generating about 2.26 milliwatts per square meter. “At this moment, the demonstration we have with the thermoradiative diode is of relatively very low power,” said Ekins-Daukes. Data shows that if adapted and improved, the equipment could produce up to 1/10 of the energy of a conventional solar panel. 

The researchers admit that this is a study in its early stages, where much still needs to be improved. Data shows that the energy potential in the tested equipment is much lower compared to a solar panel. 

The researchers also claim that there is about a decade of studies needed before we can think about bringing the product to market. If the industry can see that this is a valuable technology for them, then progress could be extremely rapid.