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New Discovery! New solar cell technology can reduce equipment operating temperature
5/9/2023 12:52:27 PM
According to the Daily Science website on the 10th, researchers from the School of Photovoltaic and Renewable Energy Engineering and the Center for Exciton Science Excellence at the University of New South Wales in Australia have recently found that using single line fission and series solar cells can more efficiently generate solar energy, while helping to lower operating temperatures, extend equipment lifespan, and introduce a new paradigm for the development of next-generation solar technology.
Tandem batteries can be composed of new compounds such as silicon and perovskite nanocrystals. Perovskite nanocrystals have a larger bandgap than silicon, which helps devices capture more solar spectra for power generation.
The best solution for traditional solar cells is to generate an electron per photon as the carrier of electrical energy. The number of electrons generated under single state fission technology is twice that under traditional conditions, where one photon excites two electrons. The equipment used to achieve singlet state fission includes tetrabenzene, which can transfer the energy generated by singlet state fission to silicon.
Scientists and engineers around the world are working hard to find the best way to integrate series cells and singlet state fission processes into commercial solar equipment, replacing traditional single junction silicon solar cells commonly found in rooftops and large-scale arrays.
This time, the researchers highlighted some key advantages of tandem batteries and singlet state fission in their work. Researchers have shown that silicon/perovskite series batteries and single line fission batteries based on tetrabenzene can operate at lower temperatures compared to traditional silicon devices. This will reduce the impact of heat loss on the equipment, extend its service life, and reduce the energy cost of equipment production.
For example, a decrease in module operating temperature of 5 ℃ -10 ℃ is equivalent to an increase of 2% -4% in annual power generation. It is usually found that for every 10 ℃ decrease in temperature, the lifespan of the device doubles. This means that the lifespan of series batteries has increased by 3.1 years, and the lifespan of single line fission batteries has increased by 4.5 years.
In addition, there is another benefit to single line fission batteries. When tetrabenzene inevitably degrades, it becomes transparent to solar radiation, allowing the battery to continue to perform the functions of traditional silicon devices.
The commercial value of photovoltaic technology can be achieved by improving energy conversion efficiency or extending operating life, "said Dr. Jessica Yajie, the main author of this research achievement." The former is the main driving force for the development of next-generation technology, while (previously) people have hardly considered the latter, which is the potential lifespan advantage
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