The efficiency of solar energy has already been proven and has a seal of approval. That doesn’t mean that science will prop its feet up and take a rest. Researchers keep looking for a way to make solar energy even more efficient and have come up with a futuristic solar cell. A breakthrough was made by the Autonomous University of Querétaro, Mexico, with the introduction of a thin-film solar cell.
Thin, non-toxic solar panels: The way to the future
The researchers at the Autonomous University of Querétaro (UAQ), in Mexico, have been working on the structure of a very small solar cell called Cu2BaSn(S,Se)4. Despite its difficult name, this design for a futuristic solar cell promises to be more efficient and greener than current solar panels.
The composition of this remarkable solar cell is what makes it so attractive. It combines elements that are not toxic and can be found in abundance, like copper, tin, sulfur, barium, and selenium.
One of the downsides of solar panels is that, although they are sustainable in terms of the energy they produce, they are highly polluting when they become waste. Regular solar panels contain toxic elements like lead, chromium, and cadmium. Those toxic elements are extremely contaminating for the soil and groundwater.
The commercialization challenges for the thin-film solar cell
Although the design is less polluting, the efficiency levels are not what they are meant to be. Therein lies the commercialization issue for this solar cell. No one wants to commercialize a solar panel that pollutes less, but is not up to the task of maximizing the energy of the sun.
Changes in the structure the way to bolster efficiency levels
The researchers at UAQ have been running tests using a simulation software called SCAPS-1D to try to improve the efficiency of the panels. Regular solar panels have an efficiency level of 21%. The idea is that the new solar cell matches and possibly beats this level. However, the tests executed so far have yielded an efficiency lever of 6.17%.
Some of these upgrades involve a change in the structure of the thin panels. Researchers have added an anti-reflection coating to capture as much light as possible. Additionally, they have improved ohmic contact, which is the electrical junction between a metal and a semiconductor, for the energy to flow smoothly. These improvements allowed them to reach an impressive 10% power conversion efficiency (PCE).
On the way to success: A higher performance
Once the 10% PCE was reached, the researchers at UAQ didn’t stop there. They did around 780 simulations with different inorganic buffers and back surface field layers. Their results didn’t disappoint; they were able to reach an astounding PCE of 28%.
Although their work has been theoretical so far, researchers believe that now is the time for experimental scientists to take the lead and use this breakthrough to see how they can channel it to make more efficient, thinner, and greener solar panels that yield high performance.
Dr. Latha Marasamy, research professor at UAQ, stated:
“Together, we are moving toward a new era of sustainable and high-performance solar solutions, propelling photovoltaics into a future where they can play a crucial role in our energy landscape.”
The Autonomous University of Querétaro has made an innovative discovery that could mean a revolution in solar energy. They understood the assignment: we already have ways of making sustainable energy, now we need to make these more effective. The thin and small solar cells could pave the way for an even greener conception of alternative sources of energy, with less toxic waste and more effective results. There is hope that experimental scientists will turn this discovery into a reality, and maybe soon, the slim solar panels could be commercially viable.