Swedish and Chinese scientists have developed organic solar cells optimized to convert ambient indoor light to electricity. The power they produce is low, but is probably enough to feed the millions of products that the Internet of Things will bring online. Organic solar cells are flexible, cheap to manufacture and suitable for manufacture as large surfaces in a printing press, they have one further advantage. The light-absorbing layer consists of a mixture of donor and acceptor materials, which gives considerable flexibility in tuning the solar cells such that they are optimized for different spectra—for light of different wavelengths.
Scientists developed a new combination of donor and acceptor materials, with a carefully determined composition, to be used as the active layer in an organic solar cell. The combination absorbs exactly the wavelengths of light that surround us in our living rooms, at the library and in the supermarket. The researchers describe two variants of an organic solar cell in an article in Nature Energy ("Wide-gap non-fullerene acceptor enabling high-performance organic photovoltaic cells for indoor applications"), where one variant has an area of 1 cm2 and the other 4 cm2. The smaller solar cell was exposed to ambient light at an intensity of 1000 lux, and the researchers observed that as much as 26.1 percent of the energy of the light was converted to electricity. The organic solar cell delivered a high voltage of above 1 V for more than 1000 hours in ambient light that varied between 200 and 1000 lux. The larger solar cell still maintained an energy efficiency of 23 percent.
Read: https://techxplore.com/news/2019-09-indoors-solar-cells.html
Scientists developed a new combination of donor and acceptor materials, with a carefully determined composition, to be used as the active layer in an organic solar cell. The combination absorbs exactly the wavelengths of light that surround us in our living rooms, at the library and in the supermarket. The researchers describe two variants of an organic solar cell in an article in Nature Energy ("Wide-gap non-fullerene acceptor enabling high-performance organic photovoltaic cells for indoor applications"), where one variant has an area of 1 cm2 and the other 4 cm2. The smaller solar cell was exposed to ambient light at an intensity of 1000 lux, and the researchers observed that as much as 26.1 percent of the energy of the light was converted to electricity. The organic solar cell delivered a high voltage of above 1 V for more than 1000 hours in ambient light that varied between 200 and 1000 lux. The larger solar cell still maintained an energy efficiency of 23 percent.
Read: https://techxplore.com/news/2019-09-indoors-solar-cells.html
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