Boosting solar efficiency by 25% – new perovskite cell shines bright!

By Oliver Townsend Jul 7, 2024
New inverted perovskite solar cell boosts 25% efficiency, 98% stability.jpegOrginal image from: https://interestingengineering.com/science/high-entropy-hybrid-perovskite-cells

Researchers at Zhejiang University in China have developed a new inverted perovskite solar cell that boasts a 25% efficiency and 98% stability. This innovative approach has significantly improved the stability of the solar cell without compromising its efficiency. The key to this advancement lies in the use of a novel high-entropy hybrid perovskite (HEHP) material, which has a unique structure with highly disordered organic moieties. These moieties contribute to entropy gain, enhancing thermal stability and structural robustness.

Enhanced Stability and Efficiency

The high-entropy structure of the HEHP material sets it apart by exhibiting a multicomponent single-phase perovskite structure. This structure offers higher phase stability at high temperatures, as confirmed through nuclear magnetic resonance (NMR) spectroscopy. The team behind this research constructed a perovskite solar cell using the HEHP film, which demonstrated remarkable water and damp-heat resistance. The cell architecture includes layers such as indium tin oxide (ITO), tin oxide (SnO2), Spiro-OMeTAD, and silver (Ag) metal contact.

Under standard illumination conditions, the HEHP-based solar cell achieved a power conversion efficiency of 25.7%, surpassing the reference device’s efficiency of 23.2%. Additionally, the cell retained over 98% of its initial efficiency after 1,000 hours of operation, indicating its suitability for long-term real-world applications.

Optimizing Performance

The improvements in efficiency and stability were attributed to the reduction of non-radiative recombinations and optimized interfaces resulting from the incorporation of HEHP. The team highlighted the superiority of HEHP in reducing electronic disorders compared to single-component materials, thanks to the interaction of multiple types of A-site cations with various defects.

The research team believes that this novel perovskite material could have broad applications across different perovskite compositions and cell architectures. This versatility positions HEHP as a potential universal and error-tolerant strategy for enhancing perovskite solar cell performance under various conditions, which could be instrumental as the industry moves towards mass production of perovskite devices.

Future Implications for Solar Energy

The development of high-entropy hybrid perovskites opens up new possibilities for unlocking the full potential of solar energy. With further research and development, these innovative materials could play a crucial role in advancing solar technology and addressing the global demand for sustainable energy solutions. The team’s findings were published in the journal Nature Photonics, showcasing the significance of their work in the field of solar energy.

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