Perovskite is an exciting new generation of solar cell materials, but they are not without problems. Although they ensure a great leap in efficiency, research shows that it is difficult to maintain the stability and normal operation of all components of the concentrator photovoltaics. Australian scientists have found a way to solve this problem. They found that high-intensity light can be used to avoid the deformation of concentrator photovoltaics performance.
The reason why perovskite solar cells are so promising is that they can be compared with traditional solar cells in terms of conversion efficiency. After about 10 years of development, the efficiency of this concentrator photovoltaics has reached more than 20%, and after combining the series design of silicon and perovskite, its efficiency is even as high as 27.7%.
This new research focuses on a perovskite type solar cell, which uses a kind of material called mixed halide perovskite. Compared with the previous design, the material has better resistance to moisture, ultraviolet and high temperature, and is known as the "paradigm shift" in the photovoltaic field. However, mixed halide perovskite is not without problems. For example, the so-called "photoinduced phase separation" is often encountered.
This happens when light (including sunlight) shines on the concentrator photovoltaics and destroys its arrangement elements. This in turn impairs the cell's ability to absorb light and therefore its performance. Considering the potential of mixed halide perovskite, people have spent a lot of energy to understand the causes of this photoinduced phase separation and possible solutions. The team behind the study stumbled upon a solution.
By placing mixed halide perovskite cells under high intensity light, they can neutralize strains placed on the ionic lattice structure. High intensity light is not the reason for the separation of these key elements, but makes them integrate together, so as to completely avoid fatal deformation.