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Advanced in the field of solar cells continue to surprise and inspire. Researchers in China have recently taken a significant step by improving the efficiency and lifespan of new generation solar cells. Thanks to an innovative strategy, they have managed to overcome a critical performance obstacle, namely the loss of photons, which has long limited the effectiveness of bifacial solar cells in Pérovskite. This promising study could transform the future of solar energy by offering a practical and evolving solution to maximize the absorption of light and improve the stability of cells.
Record efficiency and stability
The breakthrough made by the researchers made it possible to reach a record conversion efficiency (PCE) of 23.4 %, while reducing current losses to only 1.67 my cm⁻². Improved solar cells have also demonstrated remarkable stability, retaining more than 80 % of their initial performance for more than 2,000 hours under continuous light. Solar cells in Perovskite (PSCS) have long been at the center of photovoltaic research because of their exceptional performance and their low manufacturing cost. To capture even more solar light, scientists have developed bifacial versions capable of absorbing light on both sides.
Faced with growing demand for effective and stable solar cells, the limitations of conventional monofacial PSCs, in particular with regard to absorption and efficiency of the use of light, have become increasingly obviousadded the researchers. This is why the development of bifacial PSCs (Bi-PSCS) was a priority for the scientific community.
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Solving Bi-PSCS problems
Despite their promising potential, the bi-P-PSCs have been hampered by their design. Unlike traditional solar cells, they use semi-transparent rear electrodes that are not reflective, which leads to a light leak and shorten the optical route, thus resulting in a significant loss of photons. The main challenge was to build a layer of perovskite absorber to prolong the journey of light and increase the absorption of photons. However, the creation of these thick films from very concentrated solutions often leads to poor crystallization, resulting in defects that compromise performance and stability.
To overcome these challenges, researchers have introduced a multifunctional additive, 1-ethyl-3-3-guianidinium hydrochloride (EGTHCL), in order to precisely regulate the behavior of nucleation and crystallization of the high concentration precursor. This allows the formation of dense, uniform and highly crystalline films free from common defects, thus opening the way to an effective and stable application in the real world.
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A practical and evolutionary solution
This study offers a practical and evolving solution to the persistent problem of the loss of photons in bifacial devices in Pérovskite. Thanks to the high-quality thick film deposit method, based on the regulation of the dynamics of the crystallization of perovskites, the researchers were able to identify the loss of photons as the main factor of degradation of the performance of Bi-PSCs. The addition of EGTHCL has made it possible to overcome the difficulties linked to crystallization, leading to the creation of exceptional perovskite films.
This accomplishment marks an important step towards the practical and stable application of bifacial devices in perovskite in the real worldconclude the researchers. With increased efficiency and stability, this innovation could revolutionize the solar energy sector.
Towards a promising future for solar energy
The results of this research pave the way for practical applications of Bifaciales solar cells in Perovskite, promising a future where solar energy could be more accessible and reliable. As demand for sustainable and effective energy solutions increases, innovations such as it become crucial to meet global energy needs. Developments in the field of solar cells could not only reduce our dependence on fossil fuels, but also offer an ecological solution to current energy challenges.
While we are advancing towards a broader adoption of these technologies, a question persists: how will these technological advances impact global energy infrastructure in the future?
This article is based on verified sources and the assistance of editorial technologies.
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