According to reports of the physicists' organization network, the German Fraunhofer Institute for Solar Energy Systems, French concentrating photovoltaic manufacturer Soitec, and the Helmholtz Research Center in Berlin, Germany, jointly announced that they have produced a solar light with a concentration of 297. Photovoltaic conversion efficiency up to 44.7% of four-junction photovoltaic cells has set a new world record. They said that the latest research is expected to significantly reduce the cost of solar power and pave the way for solar cells with a conversion efficiency of up to 50%.
In fact, as early as May of this year, the above-mentioned three agencies and companies jointly launched a photovoltaic power conversion efficiency of 43.6% when the solar light concentration was 319 with the scientists of the French Atomic Energy Commission’s Electronics and Information Technology Laboratory (CEA-Leti). battery. On this basis, scientists have conducted detailed research and optimization and refining, and have manufactured solar cells with a photoelectric efficiency of 44.7%.
These solar cells are mainly used in concentrating photovoltaic devices. Concentrating photovoltaic technology (CPV) refers to the technology that converts concentrated sunlight directly into electrical energy through high conversion efficiency photovoltaic cells. The concentrating solar energy technology that uses the optical elements to concentrate sunlight and generate electricity is considered to be the third generation technology of solar power generation in the future.
The newly developed single cells in a four-junction solar cell are made of different III-V (b, Al, Ga, In, and V, N, P, As, Sb, etc.) semiconductor materials from Group III of the periodic table of the elements. As a result, these nodes pile up one by one, and a single subcell can absorb different wavelengths of light in the sunlight spectrum.
Frank Demers, head of research and development at the Fraunhofer Institute for Solar Energy Systems, said: "Over the years, we have been working on the development of this multi-junction solar cell. This four-junction solar cell is our After many years of hard work, in addition to improving materials and optimizing structures, a new program called 'wafer bonding' has played a key role in the R&D process. With this technology, we can combine two semiconductor crystals in an orderly manner. Instead of letting it stack up, we can produce the best semiconductor combination to produce the most efficient solar cell."
Soitec Chairman and Chief Executive Officer Andrei Jacqueliman Andri-Hove said: "In less than four months, the record of solar cell conversion efficiency has increased by 1%, which proves four-junction solar cells. The design method has great potential. I believe that the conversion efficiency of solar cells will exceed 50% soon."
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