HZB sets new record for perovskite-silicon tandem at 29.15%

February 03, 2020
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Helmholtz-Zentrum Berlin (HZB) hit 29.15% efficiency in a 1 cm2 perovskite-silicon solar cell, surpassing Oxford PV's previous mark (28%) and setting a new technology record. This value has been verified by Fraunhofer ISE and means a step forward for reaching the practical efficiency limit for perovskite-silicon cells (about 35%). The record cell features a novel electrode contact layer as well as a silicon-oxide top layer that optimizes optical coupling between the top and bottom cells. This device also uses an improved perovskite crystal, though the specific formulation has not been disclosed. As perovskite's limits continue to be pushed, clients should monitor HZB and Oxford PV for developments at the research and commercial levels.

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