According to the report of the American Physicist Organization Network on February 8, the Cavendish Laboratory at the Department of Physics of Cambridge University in the United Kingdom has developed an organic hybrid solar cell that can increase the maximum photoelectric conversion rate by more than 25%. The research results were published in the US Nano Express on February 8.
Solar cells are mainly based on semiconductor materials. Photons in photovoltaic materials absorb light energy and undergo photoelectric conversion reactions to generate electrical energy. Traditional solar cells can only absorb part of the visible light in the solar spectrum to near-red light. As the temperature increases, the energy of many blue photons is lost. This ability to absorb light of different colors at a time determines its photoelectric conversion rate will not exceed 34%.
The research team led by Professor Neil Grinnham of Cambridge University and Sir Richard developed an organic hybrid battery that can absorb red light and use extra blue light energy to generate higher currents. In general, solar cells can produce one electron from a photon. After adding an organic semiconductor pentacene in the solar cell, the solar cell can stimulate each photon to generate two electrons from the blue spectrum, thereby increasing the cell conversion efficiency to 44%.
Bruno Eller, the first author of the research paper, said: "Organic hybrid solar cells have a technical advantage over current silicon-based solar cells because they can be mass-produced at low cost just like newspaper-printed tape systems. However, The cost of a solar power plant is mostly reflected in land, labor, and installation hardware, so even if organic solar panels are cheaper, we still need to increase their efficiency and make them more competitive, otherwise you will find that buying a cheap one After the painting, it is equipped with an expensive framework."
The co-author of the paper, Mark Wilson, said: "It is important that we are moving towards the adoption of sustainable energy and provide useful ideas for exploring possible solutions." Another author Dr. Rao Aksay He pointed out: "This is just the first step toward a new generation of solar cells. We are very excited to be part of this effort." (Hua Ling)
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