World record again at HZB: Almost 30 % efficiency for next-generation tandem solar cells - Helmholtz-Zentrum Berlin (HZB)
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World record back at HZB: Tandem solar cell achieves 32.5 percent efficiency - Helmholtz-Zentrum Berlin (HZB)
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Longi claims world's highest efficiency for p-type, indium-free HJT solar cells – pv magazine International
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