Dresden 2017 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 13: Poster: Fundamentals of Perovskite Photovoltaics (joint session CPP, DS, HL)

CPP 13.25: Poster

Montag, 20. März 2017, 18:30–21:00, P1A

Temperature-dependent transient photocurrent measurements on organic-inorganic halide perovskite solar cells — •Ina Kelz1, Nico Weber1, Fabian Ruf1, Tobias Abzieher2, Nadja Giesbrecht3, Meltem F. Aygüler3, Pablo Docampo3, Heinz Kalt1, and Michael Hetterich1,21Institute of Applied Physics, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany — 2Light Technology Institute (LTI), Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany — 3Department of Chemistry, Ludwig-Maximilians-Universität München (LMU), 81377 Munich, Germany

Organic-inorganic halide perovskites as absorber material in solar cells show high power conversion efficiencies exceeding 20%. This is due to their promising properties such as a strong absorption coefficient and a low non-radiative carrier recombination. Additionally fabrication by low-cost production methods is possible. However, basic material properties of perovskite solar cells are not fully understood yet.

In order to gain a deeper insight into the electro-optic material properties temperature-dependent j-V-characteristics are measured. Organic-inorganic halide perovskites exhibit scan rate-dependent hysteresis effects which vary with various parameters such as illumination, bias voltage or temperature. Temperature dependent photocurrent transients show two regimes with different time constants, a fast component with a multi-exponential behaviour and a slow component which can be described by a single exponential function. The time constant of the slow component decreases for increasing temperature.

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