A scientific breakthrough has the potential to shift this sector of the energy industry.
For many years, solar cells have generally remained the same, with one or two new materials explored here and there.
Now, a type of “seed” has grown into an entirely new obsession, and they can easily change the future of solar power.
The biggest problems with solar cells can now easily be solved in a small way, but how does it work?
How other solar cell materials could change the face of the industry
In the solar industry, some believe that silicon-based solar power may have run its course.
It has proven its worth over the years, working hard and breaking records left and right. Until it didn’t anymore.
Now, new contenders are entering the race to see what will be top in sustainability, without compromising efficiency or stability.
However, new factors must also be added to the winning conditions.
These factors include adaptability, easy and sustainable production, and reduced reliance on critical minerals.
Refined solar-grade silicon is officially on the US Geological Survey’s list of critical minerals. Silver, aluminum, and copper are among the critical minerals used for silicon-based solar panels.
This is why other solar materials are being explored.
Two materials have shown great potential to become the next generation of solar energy.
The next generation of solar: A growing obsession
The two contending materials that scientists have become obsessed with are perovskite and kesterite.
Australian scientists have shown that kesterite is a stronger contender to be crowned the solar game-changer material. In the race, kesterite is seen as the “marathon runner.”
This thin film comprises copper, zinc, tin, and sulfur, which is why some refer to it as “CZTS.”
It is more stable in heat and moisture and less vulnerable to supply chain issues compared with other materials.
However, kesterite is still not significantly efficient, and loses more energy internally than perovskite.
Perovskite seemed like the ultimate game-changer. Efficiency reaches 25% in perovskite-silicon tandem panels, and its performance on its own is also impressive.
Yet, its ultimate obstacle has always been its long-term stability.
Now, scientists from the Chinese Academy of Sciences have discovered how perovskite can be redeemed as a game-changer.
A discovery that can lead to solar redemption
The scientists discovered that inverting perovskite’s structure could turn the solar industry upside down.
Usually, the electron transport layer is at the bottom of the structure. By moving this layer to the top, the power conversion efficiency significantly increases.
The next step was to address the long-term stability issue of perovskite.
Submicroscopic structure and electronic defects in the buried interface limit stability and efficiency.
The scientists created nanoscaled “low-dimensional halide crystal-solvate seeds” (PDPbI4·DMSO). The nanocrystal seeds improve the structural stability of perovskite and accelerate its growth speed.
Even the great white whale of solar power is addressed, because efficiency inevitably increases. A slot-die coating method was combined with the nanocrystal seeds to increase mini-module efficiency to 23.15%.
Nanocrystal seeds may shift the solar industry in a new direction
Professor Shuping Pang believes:
“This technology overcomes the longstanding scaling bottleneck caused by size effects through the combination of induced crystallization and buried interface restoration.”
It seems perovskite’s redemption is possible after all, all thanks to this method. The findings were published in the scientific journal Nature Synthesis.
By inverting perovskite and adding nanocrystal seeds, the next generation of solar power could be closer than once believed. Further research and development will enable the technology to advance to commercialization.
Combining this method with the German solar cell production method could perhaps help the industry to reach solar perfection.
