DPG Phi
Verhandlungen
Verhandlungen
DPG

Berlin 2018 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

HL: Fachverband Halbleiterphysik

HL 18: Perovskite and Hybrid Photovolatics

HL 18.1: Talk

Tuesday, March 13, 2018, 09:30–09:45, EW 203

Temperature-Dependent Electroabsorption Spectroscopy on Organic-Inorganic Perovskite Solar Cells — •Fabian Ruf1, Alice Magin1, Moritz Schultes2, Erik Ahlswede2, Heinz Kalt1, and Michael Hetterich31Institute of Applied Physics, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany — 2Zentrum für Sonnenenergie- und Wasserstoff-Forschung Baden-Württemberg (ZSW), 70563 Stuttgart, Germany — 3Light Technology Institute, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany

Organic-inorganic halide perovskites have demonstrated their potential as promising candidates for efficient, low-cost solar cells with power-conversion efficiencies surpassing established technologies such as amorphous silicon. However, despite the strong progress made, many fundamental material properties are not yet well understood. We investigate the nature of the optical transition in solution-processed perovskite solar cells utilizing temperature-dependent electroabsorption (EA) spectroscopy. The resulting EA spectra are suitable for a precise determination of the energetic position of optical transitions in the band structure. These results can be correlated with generalized Elliott fits of standard absorption spectra to investigate the nature of the observed resonances. Additional lineshape analysis of the spectra supports the conclusion of an excitonic nature of the resonances. Nevertheless, efficient charge-separation is possible in these devices which is reflected by power-conversion efficiencies up to 11.5 % (stabilized).

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2018 > Berlin