A new 'tandem' solar cell design has the potential to increase efficiency to over 24 percent.
With its notable expansion in recent years, solar cell technology has risen to the forefront of other sustainable energy sources. Their dependability, efficiency, durability, and cost are critical in terms of commercial viability and large-scale deployment of solar energy projects worldwide.
A research team from the National University of Singapore (NUS) has reported that another record in the power conversion efficiency of perovskite/organic tandem solar cells has been reached. The team's most recent analysis shows that the solar cells produced 23.6 percent power conversion efficiency, which is a significant improvement over the prior power conversion efficiency of roughly 21 percent. As a result, the improved efficiency of perovskite/organic tandem solar cells approaches the 26.7 percent power conversion rate of silicon solar cells, the current market leader in the solar photovoltaic (PV) sector.
"Technologies for clean and renewable energy are extremely important for carbon reduction," says lead researcher Presidential Young Professor Hou Yi, who is from the NUS Department of Chemical and Biomolecular Engineering and also leads a "Perovskite-based Multi-junction Solar Cells group" at the Solar Energy Research Institute of Singapore at NUS. Solar cells, which convert solar energy directly into electricity, are one of the most promising sustainable energy technologies. The high power conversion efficiency of solar cells is crucial for producing more electrical power in a smaller area, lowering the overall cost of producing solar energy."
Conventional cells used in solar power plants have a single-junction architecture, with a realistic power conversion efficiency of roughly 27 percent in industrial manufacturing. As a result, pushing the limits of solar energy production will necessitate the development of new capabilities for solar cells to convert power more effectively. To increase the power conversion efficiency of solar cells beyond 30%, stacks of two or more absorber layers may be required. As a result, tandem solar cells made up of two different types of photovoltaic materials are a prominent study topic.
"Our study reveals the huge potential of perovskite-based tandem solar cells for future commercial applications of photovoltaic technology," says Assistant Professor Hou. We hope to improve the performance of our tandem solar cells and scale up this technology based on our new discovery."
With their recent project, Hou and his colleagues have broken new ground in the field of perovskite/organic tandem solar cells. Their discovery paves the door for thin-film tandem solar cells that are light and bendy, with applications ranging from solar-powered blinds to autos, boats, and other mobile devices.
The findings were published in the journal Nature Energy.
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