New native perovskite solar cells are capable of converting 36.1% of “hot” light into electricity. This was reported by the press service of NUST MISIS.
Conventional solar cells and photovoltaic cells are made of silicon, a solid semiconductor material. In the last few decades, engineers have invented and matured the technology of perovskite solar cells, which are thin films. Perovskite is calcium titanate, a relatively rare element, but solar cells made from it are cheaper, more flexible, and more efficient under certain conditions.
NUST MISIS has created a prototype of an industrial perovskite photocell with a high bromine content 2.5 times more efficient than silicon. Its ultimate efficiency is a record and equals 36.1% in “warm” lighting, but efficiency remains high at different color temperatures. The ability to work at different temperatures (ie the content of the blue, green and red parts of the spectrum) is important not only when operating with artificial light sources, but also when working from the sun at different times of the day.
“The highly bromine-containing perovskite is extremely effective at converting light of various color temperatures into electricity under what is called warm lighting (1700 Kelvin). “In this case, bromine helps shift the edge of the absorption spectrum towards high-energy photons,” said Nigina Talbanova, one of the study’s authors.
The authors believe their invention could be used to power mini-sensors in low-light conditions, including indoors.
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Source: Gazeta
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