Berlin 2015 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 61: Posters III (Organic-inorganic perovskite semiconductors; Organic photovoltaics and electronics; Photovoltaics; Energy science; New materials and concepts)

HL 61.8: Poster

Wednesday, March 18, 2015, 15:00–20:00, Poster F

Replacement of Lead in Organic-Inorganic Perovskite Absorber Layers — •Manuel Weiß, Christoph Richter, and Derck Schlettwein — Institute of Applied Physics, Justus-Liebig-University Giessen, Heinrich-Buff-Ring 16, D-35392 Gießen

Perovskite solar cells are a very promising low-cost technology as efficiencies around 20 percent have been reported. One problem, however, is the presence of lead in the cells. Lead is known to be a toxic heavy metal which is, therefore, banned from a number of technical applications in various countries which represent, however, important global markets. The presence of lead can therefore be seen as one major obstacle that could prevent the commercial use of perovskite solar cells. Alternative metal ions that are less toxic and abundant in the earth crust are sought to replace lead at maintained functionality of the films. In this contribution, alternative metal ions were tested to form organic-inorganic perovskite layers. Films were characterized by Scanning Electron Microscopy, UV-visible absorption spectroscopy, X-ray diffraction and XPS to probe the elemental composition, structure, morphology and electronic coupling in the films. The different materials will be discussed in their applicability as new absorber layers in perovskite solar cells.