Affiliation: | 1. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, Kyiv, 03028, Ukraine 2. Catalonia Institute for Energy Research, Sant Adria del Besos (Barcelona), 08930, Spain 3. Departament d’Electronica, Universitat de Barcelona, Barcelona, 08028, Spain 4. Helmholtz-Zentrum Berlin fur Materialien und Energie, D-14109, Berlin, Germany 5. Freie Universitat Berlin, Institute of Geological Sciences, Berlin, 12249, Germany
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