A new type of ultra-stable printed solar cells, can last more than 10 000 hours, and have a very low cost. Created by a group of scientists, the new cells have already undergone a test under real-world conditions during a year, and have proved to be a highly resistant, built on a special class of material known as perovskites and regarded as the next giant in renewable energy, also have very interesting properties such as superconductivity, among others.
Although in theory it is estimated that this material is capable of reaching about 31 percent efficiency, it has only been able to reach about 22 percent in the laboratory so far, and when they are used in the real world, these values rapidly fall due to oxygen concentrations and moisture.
But a group of Swiss scientists have surpassed this barrier by using a new type of perovskite structure and thus creating a cell with a one-year stability of about 11.2 percent efficiency, quite close to the efficiency of ordinary silicon solar panels.
The team created a 2D and 3D hybrid perovskite solar cell, using two different types of this material, to be able to draw on two characteristics that are very important to achieve long life durability, water and oxygen resistance, and energy transport, and while 2D perovskite acts as a protective layer against environmental agents, the 3D layer is responsible for the production of energy.
Perovskite solar cells are constructed by a layer overlay method, as you can see in the panel representation depicted in image below:
As well as having achieved a respectable 10,000 hours of life in day-to-day conditions, the efficiency achieved by this cell was of a fantastic 14.6 percent. With some optimization of the internal composition of these panels, and with a bit more time, it is probable that these will reach approximate values of their theoretical limit.