Stock Photo - 19 October 2023, Berlin: Björn Rau, physicist and expert for thin-film solar cells at the Competence Center Photovoltaics (PVcomB) of the Helmholtz Center in Berlin-Adlershof, stands in front of a building whose shell consists of solar modules. The head of government and the heads of government of the eastern German states met today at a special conference at the Helmholtz Center. Photo: Jörg Carstensen/dpa. - Berlin/Berlin/Germany

Stock Photo: 19 October 2023, Berlin: Björn Rau, physicist and expert for thin-film solar cells at the Competence Center Photovoltaics (PVcomB) of the Helmholtz Center in.

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