Russian scientists have developed a miniature photoelectric module based on perovskite to power low-power electronics. This was reported by the press service of NUST MISIS, where the development was created.
Perovskite solar cells are considered one of the most promising areas of solar energy. It is cheaper, more flexible and can be produced as a thin film compared to its silicon counterparts. Therefore, they can cover almost any surface, including the walls of buildings and car bodies. At the same time, the efficiency of such elements is approximately equal to that of silicon analogues (about 25%), but engineers for a long time could not solve the problem of perovskite degradation – this material is destroyed by chemical interaction with the elemental charge. -transport layers.
Scientists from the University of Science and Technology MISIS found that the use of chlorine alloy additives in the composition of a perovskite thin film not only leads to an increase in tool properties – an efficiency of 20.1%, but also increases the durability of the work. 3500 hours, which corresponds to the world level. The result was also confirmed when the samples were scaled up to industrial prototypes measuring 25 square centimeters.
“If we consider only the photoactive perovskite layer, then the addition of chlorine does not lead to stabilization of the structure of the thin films when exposed to degradation factors. However, the use of doped layers in the solar cell architecture significantly extends the service life under high-intensity light and heat. Thus, electrochemical corrosion of the device A metastable state is reached, where processes occur but the dynamics are significantly reduced,” explains Danila Saranin, one of the study’s authors.
Further research showed that, based on the technology created, it is possible to produce not only laboratory prototypes, but also working samples that can be used to power low-power electronics such as watches or wearable sensors.
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