Abstract The team led by Sarah H. Tolbert, a professor at the University of California, Los Angeles, designed a new material system that uses sunlight to generate electricity and store energy for weeks. Researchers have been inspired by the process of plant photosynthesis to develop a...
The team led by Sarah H. Tolbert, a professor at the University of California, Los Angeles, designed a new material system that uses sunlight to generate electricity and store energy for weeks. Inspired by the process of plant photosynthesis, the researchers developed a new type of water-based micelles consisting of a conjugated electrolyte polymer as a charge donor and a nanoscale fullerene as a charge acceptor, and in a smaller size. The interface combines the two. Among them, the polymer donor can absorb sunlight and transmit electrons to the fullerene acceptor, thus generating electrical energy.
The researchers also found that by rationally designing a polymer-fullerene assembly, the system can separate and maintain the charge in the material, where light-induced polarons (stably separated charge pairs) can be as long as possible. The life span of days or weeks greatly increases the energy retention rate.
Today's solar panel materials can only store energy converted from sunlight for a few microseconds, and the technology can store energy for weeks, which can change the way solar cells are designed in the future. Such organic synthetic photovoltaic materials may also be used in artificial photosynthesis. And the material is synthesized in water rather than in toxic organic solutions and will be more environmentally friendly.
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