Solid-state dye-sensitized batteries achieve 15% conversion

According to reports recently organized by the Physicist Organization Network, Swiss scientists have adopted a new two-step method to create a solid-state dye-sensitized solar cell (DSSC) with a conversion rate of 15% that can be compared with conventional amorphous silicon solar cells. It is beautiful. Scientists said that the latest research will create a new era of DSSC research and development. The future stability and efficiency of DSSC is expected to equal or even exceed the current best thin-film photovoltaic solar cells. The study was published in the latest issue of Nature.

Compared with traditional solar cells, DSSC has many advantages. They are simple, low cost, environmentally friendly, and have high conversion efficiency under cloudy and artificial light conditions. But so far, its conversion efficiency is still lower than that of silicon-based solar cells. The main reason lies in the voltage loss generated during the sensitizing dye regeneration.

The latest research from the Swiss Federal Institute of Technology in Lausanne (EPFL) may change this situation. The new battery uses a perovskite (CaTiO3) (Note: 3 is a lower corner) material as a light-harvesting device and uses an organic hole-transport material to replace the electrolyte used in conventional batteries. In the process of manufacturing new batteries, scientists will deposit perovskite materials directly on a piece of metal oxide film. However, this raises the problem that the addition of a monolithic material will often destabilize the shape and efficiency of the resulting solar cell, making it difficult to apply it to everyday life.

But the team used a new two-step approach to solve this problem. First, they deposited part of the perovskite in the cavity of the metal oxide support, and then allowed the deposited part to come into contact with a solution containing another part of the perovskite. Once they contacted, they reacted immediately and became highly sensitive. The pigmentation of the solar cells can therefore be well controlled.

The new method increases the conversion efficiency of dye-sensitized solar cells to 15%, which exceeds the conversion efficiency of conventional amorphous silicon solar cells. Scientists believe that the latest method will help to develop a DSSC with better performance. Its stability and efficiency are expected to equal or exceed the current best thin-film photovoltaic solar cells. (Liu Xia)

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