According to the official website of the University of British Columbia (UBC) in Canada, researchers at the school have developed a cheap and sustainable method that uses bacteria to convert light into energy to make solar cells. This new battery produces a higher current density than before Class equipment is stronger, and the working efficiency in dim light is the same as in bright light.
Researchers say that this innovation is an important step towards widespread adoption of solar cells in places like Northern Europe and British Columbia where there are many rainy days. With the further development of technology, this kind of biogenic solar cells made of living organisms can be as efficient as the synthetic batteries used in traditional solar panels.
In the past, when building a battery derived from biology, the method used was to extract natural pigments used for bacterial photosynthesis, but this method is costly and complicated, requires the use of toxic solvents, and may cause degradation of the pigment.
To solve the above problems, the researchers left the pigment in the bacteria. They genetically engineered E. coli to produce large amounts of lycopene. Lycopene is a pigment that gives tomato red color and is particularly effective for absorbing light and converting it into energy. The researchers applied a mineral that can act as a semiconductor to the bacteria, and then applied this mixture to the glass surface. They used coated glass as the battery anode, and generated a current density of 0.689 mA / cm2, while other researchers in the field achieved a current density of only 0.362 mA / cm2.
The project leader and professor of the UBC Department of Chemistry and Bioengineering, Vikramdia Yadav, said: "We have recorded the highest current density of bio-derived solar cells. We are developing these hybrid materials to make them economical It is manufactured in a sustainable way and the final efficiency is comparable to traditional solar cells. "
Yadav believes that this process will reduce the production cost of pigments by 10%. Their ultimate dream is to find a way that will not kill bacteria, thereby making pigments indefinitely. In addition, this bio-derived material can also be widely used in mining, deep-sea exploration, and other low-light environments. (Liu Xia)
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