Dresden 2017 – wissenschaftliches Programm
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 Hetterich1,2 — 1Institute 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.