This is the 3685th most frequent German word.
photovoltaik
Photovoltaik: The technology and process of converting sunlight into electrical energy using solar cells.
Here, 'Photovoltaik' is used as a noun referring to the technology and field related to solar energy conversion.
Die Photovoltaik ist eine vielversprechende Technologie zur umweltfreundlichen Energiegewinnung.
Photovoltaics is a promising technology for eco-friendly energy generation.
In this sentence, 'Photovoltaik' indicates the scientific field and study of photovoltaic systems.
Ich interessiere mich für die Forschung im Bereich der Photovoltaik.
I am interested in research in the field of photovoltaics.
Here, 'Photovoltaik' is part of the compound noun 'Photovoltaikanlage' which refers to a specific application or system of photovoltaic technology.