Concentrate on the downsides: A brand-new course to extremely effective tandem cells

Mar 31, 2020 05:11 PM ET
  • Researchers in the U.S. and also South Korea have actually recognized what could be a brand-new course to high-efficiency perovskite-silicon tandem solar cells. With design adversely billed bits in the passivation layer, the team made a tandem cell with 26.7% performance. With more tweaks to the silicon layer they anticipate to be able to exceed 30%.
Concentrate on the downsides: A brand-new course to extremely effective tandem cells
Image: Warren Gretz/NREL

Researchers at the United States National Renewable Energy Laboratory (NREL) dealing with the Korea Advanced Institute of Science as well as Technology, have actually shown a method which might open brand-new paths to the growth of readily feasible perovskite-silicon tandem solar cells.

Passivation layers are frequently contributed to perovskite solar cells to restrict their sensitivity-- enhancing efficiency and also security. The NREL's exploration entails design such a layer to conquer a number of obstacles. The team concentrated on the adversely billed fragments-- anions-- in the passivation layer and also discovered including the anion thiocyanate, blended with iodine, might increase gadget efficiency. The thiocyanate supposedly aided boost present as well as the iodine enhanced voltage.

In the paper Efficient, steady silicon tandem cells allowed by anion-engineered wide-bandgap perovskites, released in Science, the U.S.-Korean team explained perovskite-silicon tandem cells used the unique technique. The scientists assert to have actually attained 26.2% performance and also preserved greater than 80% of first efficiency after 1,000 hrs of continual lighting.

The perovskite layer itself apparently flaunted a performance of 20.7% as well as the team is convinced extra job to best the silicon layer might indicate their strategy would certainly produce tandem cells with effectiveness of greater than 30% as well as open brand-new opportunities for perovskite solar battery advancement.

"This research offers a brand-new basic technique with clear technical innovations and also clinical understandings for more innovation of perovskite innovations," stated Kai Zhu, elderly researcher in the chemistry and also nanoscience facility at the NREL.

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