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Perovskite solar cells could be on the verge of a final breakthrough. A new approach using special salts promises stability and an efficiency of up to 26.28 percent.
Perovskite solar cells are seen as a source of hope in the solar industry. They already achieve high levels of efficiency, but have weaknesses in terms of stability and efficiency. A new research project describes a strategy to solve these problems. Namely: the passivation of defects at the cell interfaces using specifically developed organic salts.
Perovskite solar cells often have defects at the interfaces between the perovskite layer and the electron transport layer. These defects lead to energy losses through non-radiative recombination, which reduces efficiency. They also promote the migration of ions, which affects the long-term stability of the cells.
Perovskite solar cells: Salts correct defects at interfaces
Organic salts can apparently help with this. They contain positively and negatively charged molecules that specifically compensate for defects on both sides of the interface. Amino acid salts with specially designed molecular structures appear particularly promising.
The researchers developed three of these salts and tested their ability to neutralize defects. They found that the size of the molecules and the number of their hydrogen atoms are crucial for effectiveness. A salt called VBETS showed particularly good results because it offers an optimal balance of molecular size and chemical properties.
Perovskite solar cells: New approach promises more efficiency
Solar cells treated with VBETS not only achieved higher efficiencies of up to 26.28 percent, but also showed significantly improved stability. Tests showed that after 4,000 hours of operation, the treated cells still retained 90 percent of their original efficiency – compared to 70 percent for untreated cells.
The new approach could transform the efficiency and longevity of perovskite solar cells in the long term, making them a competitive option in the renewable energy sector. Targeted passivation of defects not only improves performance but also paves the way to commercial applications.
The findings could also be transferred to other types of solar cells, which would further advance the development of sustainable energy technologies.
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As a Tech Industry expert, I am incredibly excited about the potential breakthrough in Perovskite solar cells. Perovskite solar cells have long been hailed as the next big thing in renewable energy due to their high efficiency and low cost. However, they have faced challenges such as stability issues and limited scalability.
The new approach that solves these problems is a game-changer. By addressing the stability issues and improving scalability, Perovskite solar cells could finally become a viable alternative to traditional silicon solar cells. This breakthrough could revolutionize the solar energy industry, making clean and renewable energy more accessible and affordable for everyone.
I believe that this advancement in Perovskite solar cells has the potential to significantly impact the renewable energy sector and accelerate the transition to a more sustainable future. I look forward to seeing how this technology develops and the positive impact it will have on our environment and society.
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