Silizium-Wafer in einem Laserlabor des Interdisziplinären Forschungsprojektes "Nano-SIS" der Friedrich-Schiller-Universität Jena, aufgenommen am 14.07.2010. In dem vom Bundesministerium für Bildung und Forschung (BMBF) mit 1,7 Millionen Euro geförderten Projekt arbeiten die jungen Wissenschaftler an der Entwicklung hocheffizienter und kostengünstiger Solarzellen sowie Photodioden für die Sensorik. Foto: Jan-Peter Kasper/FSU

Layers and Surfaces for Photovoltaics and Sensors

New concept for efficient and cost-saving solar cells

The Nano-SIS team has developed a highly efficient solar cell system for large-scale and cost-effective solar cell production by using a sputtering process. The technology is based on a new and patented cell design with nanostructured silicon interfaces.

The interdisciplinary research group »Nano-SIS« is part of the Institute of Applied Physics at Friedrich Schiller University Jena. The goal of this project is the creation of a highly efficient solar cell concept by employing nanostructured »black silicon« at low production costs using SIS systems for cell fabrication.

To achieve a nanostructured surface, we use an inductively coupled plasma (ICP) etching process. The gas mixture during the process leads to high transparency and a specific resistivity.

A promising approach for rapid, simple and low cost fabrication of solar cells is the so called semiconductor - insulator - semiconductor (SIS) system. Here, a thin insulator is coated on doped silicon, followed by the deposition of a transparent conductive oxide (TCO).