The team of scientists who make 'reverse solar cells', in the dark, also generates electricity

Scientists have just made something impossible: reverse solar technology, because instead of using light, they use darkness to generate electricity. It is also difficult to call it a 'Solar' battery, which should soon change to a Black Hole battery for easy association.

To put it simply, based on the radiant cooling mechanism and some electric devices with a total value of . 700,000 VND, the team of researchers has generated enough electricity to light an LED light bulb.

This battery can also be called the Black Hole battery for easy association.(Illustration).

' The amount of energy emanating from the Sun must also be approximately equal to the amount of energy emitted from the Earth through the phenomenon of heat radiation, so that the Earth can keep an almost constant temperature at all times, so the amount of energy that can be exploited is huge, '' said the new research report author, electrical engineering professor Shanhui Fan from Stanford University.

In their study, the team of researchers points to a disgusting reality: about 1.3 billion people are ignorant of electric light. Even though we already have solar cell technology, power-hungry communities still need light at night. But instead of counting an expensive power storage device, the team of scientists is thinking of a system that can generate energy from the night.

Solar cells generate electricity through a mechanism called photovoltaic - light shining on certain materials produces electricity, or through heat - the sun is hotter than Earth, and the difference This temperature can generate energy. The new research shows another way, a system that takes advantage of the heat generated by the Earth itself.

According to the report, this darkness-generating system is an aluminum disc with a diameter of 20 cm in black color, attached to a commercially available thermoelectric generator. These black areas are the source of radiation, temperatures a few degrees below the outdoor air. Heat flow will come from the Earth source into the air, then through the thermoelectric generator and then to the disk; The disc will radiate heat.

Electricity generation mechanism of the new system.

A test conducted in California showed that the system generated 25 milliwatts of electricity per square meter of disk, enough to light an LED light bulb. When it becomes bright, the system will do the opposite: it will absorb heat from sunlight to generate electricity.

However, at the present time, the system is still very theoretical, and what scientists actually tested only proved the tip of the problem, that it could work. As the system scales up, a series of new questions will appear.

The ability to 'generate electricity from the dark' is completely inferior to that of solar energy, about 100 times less dense. But have to admit that the price is really cheap, it also generates energy without the sun. If somehow, applied science gets this science report, turns it into something really useful and on a large scale, the energy industry will have a new breakthrough.