The research team of the Hong Kong University of Science and Technology recently discovered a new material system that will hopefully rewrite the future of organic solar cells. The use of this material causes organic solar cells to achieve high-efficiency and high-speed charge separation with near zero charge separation driving force, which means that environmentally friendly organic solar cells can be comparable to the performance level of inorganic solar cells.
This breakthrough was discovered by the team led by Yan He, a professor of chemistry at the University of Science and Technology, and was published in Nature Energy magazine in June.
Organic solar cells are an important third-generation solar cell technology, but it requires a driving force of 0.3 eV or more to carry out the necessary steps of power generation, namely charge separation. Because of the demand for driving force, organic solar cells inevitably generate a large voltage loss, thus limiting its photoelectric conversion efficiency.
This breakthrough will have a revolutionary impact on organic solar cells. Currently, the best performing organic solar cell can only achieve a photoelectric conversion efficiency of 12%-13%. If the driving force required for charge separation is reduced to near zero, the maximum conversion efficiency of the battery can be increased to 20%-25%. It is comparable to today's most advanced inorganic solar cells.
Yan He said that this research has redefined the highest photoelectric conversion efficiency that organic solar cells can achieve in basic research and industrial applications, and the team is very optimistic about the prospects of organic solar cells. The future hopes to cooperate with experts in chemistry, physics, and energy to create an important research platform in this exciting and rapidly growing field. (Reporter Chen Ran)
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