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Electronicsweekly.com reports [electronicsweekly.com]

Researchers at the University of Michigan have found a way to stack solution-processed organic solar cells on top of vacuum-processed cells, creating an tandem solar cell with 15% efficiency.

“For the last couple of years, efficiency for organic photo-voltaics was stuck around 11 to 12%,” said Michigan physicist Xiaozhou Che.

The top solution-processed non-fullerene-acceptor cell absorbs infra-red up to 950nm, and the bottom fullerene-based cell absorbs visible light starting at 350nm.

“By themselves, the cells achieve 10 to 11% efficiency. When we stack them together, we increase light absorption and efficiency improves to 15% with an anti-reflection coating,” said Che [...]

High fabrication yield organic tandem photovoltaics combining vacuum- and solution-processed subcells with 15% efficiency [nature.com] (DOI:10.1038/s41560-018-0134-z) (DX [doi.org])

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