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Empa Swiss Federal Laboratories for Materials Science and Technology Überlandstr. 129 8600 Dübendorf, Switzerland http://www.empa.ch
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Empa Swiss Federal Laboratories for Materials Science and Technology

Die Tandem-Solarzelle kann's einfach besser

Dank Zauberkristall Perowskit zu höherer Effizienz

(PresseBox) (Dübendorf, )
Zwei Solarzellen übereinander bringen Vorteile: Ein grösserer Anteil des Sonnenlichts kann in Strom umgewandelt werden, weil die Energie in zwei Stufen «geerntet» wird. Empa-Forscher haben ein Verfahren entwickelt, das solche Tandem-Solarzellen in preisgünstiger Roll-to-Roll-Produktion möglich macht. Das schonende Produktionsverfahren geht bei nur 50 Grad Celsius vonstatten.

Die halbtransparente Perowskit-Solarzelle absorbiert UV-Licht und blaues sichtbares Licht. Rotlicht und Infrarot-Strahlung lässt sie durch. Auf dieser Basis lässt sich eine zweistufige «Tandem-Solarzelle» bauen, deren Wirkungsgrad weit höher liegt als bei einstufigen Solarzellen. (Foto: Empa)

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