According to a report recently organized by the Physicist Organization Network, researchers at North Carolina State University in the United States have followed the path of the organic vascular system to create a self-healing solar cell device that allows solar cells that have reduced performance due to ultraviolet degradation in the sun to recover performance. The results of the study were published in the "Science Report" of Nature's periodical.
If you can't understand how solar cells "heal" yourself, look at the leaves of the tree or the back of your hands. The "branching" vascular channels are the nutrients that the entire leaf and hand use to circulate to maintain life, and this has inspired the researchers to establish high-efficiency and low-cost solar cells.
The dye-sensitized solar cells (DSSCs) consist of water-based adhesive cores, electrodes, and inexpensive photosensitive organic dye molecules. Dye molecules that are stimulated by solar light to generate electricity will eventually degrade and lose efficiency. This is one of the major obstacles to the long-term stable operation of organic dye-based solar energy capturing devices, and the regenerative function of imitating plant leaves is expected to solve this problem.
The researchers said: “The branch network of leaves can maintain its moisture and nutrient content, so we designed the microchannels of solar cells in a similar way. Let the ineffective photovoltaic cells appear under high-intensity ultraviolet light, and regenerate through the fresh dyes drawn into the channels. At the same time, the 'exhausted' dye molecules are circulated from the battery. This process prompts the equipment to recover its effectiveness in multiple cycles of power production."
New research has given the microfluidic regeneration capability of organic dye photovoltaic power generation systems. The hydrogel medium of the embedded channel passes a convection diffusion mechanism, allowing a quick and even supply of photoactive reagents. After a water wash activation cycle, the organic components in the dye-sensitized photovoltaic power generation system can be replaced to restore photovoltaic performance. (Hua Ling)
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