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@hansbot@mastodon.greenpv magazine InternationalAll-perovskite tandem solar cell with 28.5% efficiencyA Chinese research team has fabricated an all-perovskite solar cell with a 3D/3D double-layer perovskite heterostructure that reportedly ensures improved charge extraction. The device achieved an open-circuit voltage of 2.112 V, a short-circuit current of 6.5 mA cm-2, and a remarkable fill factor of 81.9%.