Ayomi Perera, a doctoral student in chemistry, Sri Lanka, is working under Stefan Bossmann, professor of chemistry, to improve dye-sensitized solar cells. The cells are a solar technology that use a dye to help generate energy from sunlight. By creating a less toxic dye and combining it with a bacteria, Perera's solar cells are friendlier to the environment and living organisms -- making an alternative energy solution to fossil fuels even greener.
"Dye-sensitized solar cells, which are solar cells with light-absorbing dye, have been around for more than 20 years, but their highest efficiency has stayed close to 11 percent for some time," Perera said. "So the thought was that rather than trying to increase the efficiency, let's try to make to make the technology more green."
To make the solar cells greener and more efficient, Perera begins with the bacteria Mycobacterium smegmatis. A mycrobacterium is a type of pathogen that can cause diseases such as tuberculosis. Perera is using a species that is completely harmless and can be found in soil and cornflakes. It also produces the protein MspA, which can be used for numerous applications once it has been chemically purified.
After purification, Perera combines the protein with a synthesized dye that is less toxic than traditional dyes. The protein-dye mixture is coated onto individual solar cells -- which form large solar panels when assembled -- and is then tested with artificial sunlight to measure energy output.
"The idea is that the protein acts as a matrix for electron transfer for this dye that absorbs sunlight," Perera said. "We want the protein to be able to capture the electron that the dye gives out and then transfer that electron in one direction, thereby generating an electrical current."
Although the new dye-sensitized solar cells currently do not improve on the technology's ability to convert sunlight into electrical current, the technology is the first of its kind and could help low-cost solar cells become a more viable option in the alternative energy field.
"This type of research where you have a biodegradable or environmentally friendly component inside a solar cell has not been done before, and the research is still in its early stages right now," Perera said. "But we have noticed that it's working and that means that the protein is not decomposed in the light and electric generating conditions. Because of that we believe that we've actually made the first protein-incorporated solar cell."
In February, Perera was one of two Kansas State University graduate students named a winner at the ninth annual Capitol Graduate Research Summit in Topeka. She received a $500 scholarship from KansasBio and will present her poster, "Design of a 'Greener' Solar Cell using Mycobacterial Protein MspA," at the organization's board of director's meeting in May.
Perera said the summit benefited her research because it gave her the chance to share her work with state legislators in addition to the scientific community. As a result, legislators can understand the work and how it affects Kansas.
"We know that fossil fuels are going to run out in the very near future," Perera said. "Kansas is getting a reputation as one of the central places in the U.S. for alternative energy research because of the abundance of sunlight and wind. I want to contribute to that and to the betterment of humanity with this research."
Ayomi Perera, email@example.com
Ayomi Perera | Newswise Science News
Stretchable biofuel cells extract energy from sweat to power wearable devices
22.08.2017 | University of California - San Diego
Laser sensor LAH-G1 - optical distance sensors with measurement value display
15.08.2017 | WayCon Positionsmesstechnik GmbH
Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.
As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...
Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.
Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...
For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.
While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...
An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.
The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...
A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.
Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...
16.08.2017 | Event News
04.08.2017 | Event News
26.07.2017 | Event News
22.08.2017 | Health and Medicine
22.08.2017 | Materials Sciences
22.08.2017 | Life Sciences