A South Korean innovation is pushing the boundaries of solar energy with a tandem cell combining silicon and perovskite. This device, validated by experts, paves the way for more efficient and accessible energy production.
Traditional solar cells are reaching their theoretical limits, but a new approach could change the game. By combining two materials, researchers have managed to surpass current performances, offering concrete hope for the future of renewable energy.
A promising combination of materials
The tandem cell uses a perovskite layer to capture high-energy light, while silicon processes low-energy light. This synergy optimizes energy conversion, surpassing the performance of conventional cells.
With an efficiency of 28.6%, this device sets a new world record. This performance has been certified by the Fraunhofer Institute, a leading organization in the field of solar energy.
A theoretical limit pushed further
Silicon cells face a theoretical limit of 33.7%. By integrating perovskite, researchers have raised this limit to 43%, opening up new prospects for the solar industry.
Although the current record remains below this limit, it demonstrates the potential of this technology. The progress made suggests rapid and large-scale commercialization.
A more sustainable future
The design of this tandem cell is suited for mass production. Tests have been conducted on a standard format, facilitating its integration into existing industrial processes. This simplicity in manufacturing reduces the time between research and commercialization.
This breakthrough could reduce the cost of solar energy and its environmental footprint. By increasing cell efficiency, it allows for more energy production with fewer materials.
To go further: What is the theoretical limit of solar cells?
The theoretical limit, or Shockley-Queisser limit, defines the maximum efficiency a solar cell can achieve. For silicon cells, this limit is 33.7%, meaning that one-third of solar energy can be converted into electricity.
This limit is due to the nature of sunlight and the properties of materials. Some of the energy is lost as heat or unabsorbed light, reducing overall efficiency.
Tandem cells, combining silicon and perovskite, push this limit to 43%. By using two complementary materials, they capture a broader range of the light spectrum, maximizing energy conversion.
Although current records remain below this limit, technological progress suggests significant advancements. These innovations could make solar energy even more competitive and accessible.
Article author: Cédric DEPOND