JUL 08, 2018 9:10 AM PDT

How bacteria is helping us harness solar power, even on those cloudy days

One of the principal arguments that solar energy comes up against is its obvious dependence on sunlight - and for places that don’t receive much, or consistent sun, this form of renewable energy is basically unviable. But researchers from the University of British Columbia in Canada have recently discovered a loophole that may make harnessing solar power possible even on those gray days.

"Our solution to a uniquely B.C. problem is a significant step toward making solar energy more economical," said Vikramaditya Yadav, a professor in UBC's department of chemical and biological engineering who led the project.

Using bacteria in order to convert light to energy, the research team developed a solar cell that is capable of generating a strong current even in “dim light” days, such as those experienced much of the year in British Columbia or England. And to make it better, it’s cheap.

Called “biogenic” solar cells, this living technology has the potential to become just as widely used as conventional solar panels. Because solar panels are essentially composed of solar cells, scientists in the past have tried to create similar technologies, by extracting the naturally-occurring dye that bacteria need for photosynthesis to convert light into electrical currents. But past attempts have been too complex and expensive. What the UBC team did, instead, was keep the dye in the bacteria and use a genetically engineered version of E. coli to produce a dye called lycopene that is really good at converting light into energy. “This modification yields a strain that overproduces the photoactive pigment lycopene,” write the authors. Science Daily explains the process and magnificent results:

Clouds got you down? Not anymore! Photo: Synergy Power

“The researchers then coated the bacteria with a mineral that could act as a semiconductor, and applied the mixture to a glass surface.W ith the coated glass acting as an anode at one end of their cell, they generated a current density of 0.686 milliamps per square ccentimeter-- an improvement on the 0.362 achieved by others in the field.”

Yadav was excited about the outcomes from the team’s hard work. "We recorded the highest current density for a biogenic solar cell. These hybrid materials that we are developing can be manufactured economically and sustainably, and, with sufficient optimization, could perform at comparable efficiencies as conventional solar cells," Yadav commented.

The authors have significant hope for what lays ahead in the development of this biogenic solar cell. An obvious advantage is the great reduction in costs - Yadav estimates the process cuts costs to about one-tenth of the original dye production process. But the technology also holds possibilities for biogenic materials in mining, deep-sea exploration and other low-light environments. More research will need to be conducted in order to determine the extent of biogenics .

Sources: Science Daily, Nano Micro Small

 

About the Author
  • Kathryn is a curious world-traveller interested in the intersection between nature, culture, history, and people. She has worked for environmental education non-profits and is a Spanish/English interpreter.
You May Also Like
SEP 14, 2021
Earth & The Environment
Record Activist Murders and Illegal Logging
SEP 14, 2021
Record Activist Murders and Illegal Logging
Last year, 2020, was the deadliest year for conservation activists. According to Global Witness, 227 environmental ...
SEP 21, 2021
Plants & Animals
Increasing Production of Aquatic "Blue" Foods Promotes Sustainable Access To Healthier Diets
SEP 21, 2021
Increasing Production of Aquatic "Blue" Foods Promotes Sustainable Access To Healthier Diets
What is a “blue” food? Hint: it doesn’t mean foods that are blue in color.  “Blue” fo ...
SEP 30, 2021
Cannabis Sciences
Illegal Cannabis Grow Sites Could be Poisoning Threatened Animals
SEP 30, 2021
Illegal Cannabis Grow Sites Could be Poisoning Threatened Animals
Cannabis has been legalized for medicinal or recreational purposes in many US states, which is thought to be driving a r ...
OCT 06, 2021
Chemistry & Physics
2021's Nobel Prize in Physics Recognizes Foundational Work in Climate Science
OCT 06, 2021
2021's Nobel Prize in Physics Recognizes Foundational Work in Climate Science
The 2021 lineup for one of the world’s most prestigious awards has been announced, and the medal for physics has b ...
OCT 09, 2021
Earth & The Environment
New Technique to Refine Rare Earth Metals
OCT 09, 2021
New Technique to Refine Rare Earth Metals
Rare earth elements, though not particularly rare, are difficult to collect and very useful for our 21st-century li ...
OCT 18, 2021
Plants & Animals
Reducing Jet Fuel Emissions Using Plant-Based Fuel
OCT 18, 2021
Reducing Jet Fuel Emissions Using Plant-Based Fuel
Airplanes have certainly revolutionized global travel, allowing people to traverse our wide world with relative ease. Bu ...
Loading Comments...