Berlin 2018 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 13: Poster Session I

HL 13.46: Poster

Monday, March 12, 2018, 17:30–19:30, Poster B

Spectroscopic Characterisation of Trap States in Perovskite Solar Cells — •Sebastian Reichert, Fabian Meier, Alexander Wagenpfahl, and Carsten Deibel — Institut für Physik, Technische Universität Chemnitz, 09126 Chemnitz, Germany

Perovskite solar cells constitute an intensely studied topic in photovoltaics caused by their fast improvement in power conversion efficiency. Investigation of perovskite solar cells has been challenging due to the richness of physical processes occuring on similar time scales. Recently, significant attention has been paid to the capacitance properties in dependence of frequency and applied voltage. Capacitance spectroscopy can be used to infer underlying physical mechanisms such as the charge carrier loss mediated by trap states within the active layer. We present the analysis of methyl ammonium lead iodide solar cells by impedance spectroscopy, capacitance--voltage measurements and deep level transient spectroscopy. These techniques offer access to many electronic processes and allow to understand the influence of trap states on the device performance.