NREL’s Latest Solar Cell Efficiency Chart Includes Tandem Devices

Renewable energy enthusiasts and researchers have reason to celebrate as the National Renewable Energy Laboratory (NREL) recently announced updates to its renowned Best Research-Cell Efficiency Chart. This chart, a staple on NREL's website, now includes hybrid and tandem perovskite cells, reflecting the latest advancements in solar cell technology.

The NREL team has introduced an interactive version of the chart, providing users with a more engaging experience and access to the underlying data table. This enhancement allows individuals to delve deeper into the specifics of cell efficiency and stay informed about the cutting-edge developments in the field.

One of the significant additions to the updated chart is the new "Hybrid Tandems" category, catering to the growing interest in tandem PV cells. These cells, which consist of two separate absorbing layers to capture a broader spectrum of solar energy, are making waves in the industry. The Hybrid Tandems category showcases record tandem cells with layers made of different PV materials, including subcategories like Perovskite/Si and Perovskite/CIGS.

Furthermore, the chart revamp includes changes to the "III-V Multijunction Cells" category, streamlining the presentation of high-efficiency cells. By consolidating all III-V concentrator cells into one subcategory and grouping three- and four-junction non-concentrator cells together, the updated chart offers a clearer and more organized view of the data.

Recognizing the growing interest in all-perovskite two-terminal tandem solar cell technology, the NREL team has also introduced a new subcategory under the Emerging PV category. The "Perovskite tandem cells" subcategory will highlight the record efficiency of these tandems, irrespective of the number of junctions, providing valuable insights into this promising technology.