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Bioengineer
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Boosting Perovskite Solar Cells with Defect-Free SnO2
- A novel excess ligand strategy in the chemical bath deposition of tin oxide (SnO₂) has been introduced, aiming to enhance the efficiency of perovskite solar cells by addressing traditional CBD method limitations.
- The method suppresses the cluster-by-cluster pathway, promoting ion-by-ion growth and resulting in highly uniform, low-defect SnO₂ thin films with improved optoelectronic properties.
- Surface recombination velocity is significantly reduced to 5.5 cm/s, showcasing the effectiveness of the excess ligand strategy in passivating surface states and minimizing trap-assisted recombination.
- The SnO₂ electron-transport layers demonstrate exceptional electroluminescence efficiency of 24.8% while contributing to charge extraction and recombination suppression for enhanced device stability.
- Perovskite solar cells utilizing this strategy achieved a high power-conversion efficiency (PCE) of 26.4%, supporting scalability for commercial-level fabrication.
- The method's versatility is highlighted by its compatibility with carbon-based perovskite cells, reaching an efficiency of 23.1% in solar modules, showcasing potential market impact and broader device applicability.
- The excess ligand approach manipulates ligand content to control nucleation pathways, offering potential advancements in oxide semiconductor fabrication beyond SnO₂ for improved electron-transport layers.
- The rapid deposition and improved film quality of the excess ligand method lead to cost savings, higher throughput, and enhanced scalability in manufacturing solar cells.
- This research not only enhances perovskite solar cell performance but also addresses stability and efficiency challenges, paving the way for commercial viability and broader adoption of this renewable energy technology.
- The excess ligand CBD method could facilitate the production of flexible, lightweight solar modules with low manufacturing costs, accelerating the deployment of perovskite-based photovoltaics in large-scale energy projects.
- With record-setting efficiencies and scalable production capabilities, this advancement signifies a significant step towards bridging research innovations with practical applications in the sustainable energy sector.
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