Dresden 2017 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 28: Poster: Fundamentals of Perovskite Photovoltaics (joint session CPP, DS, HL)

HL 28.25: 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 Hetterich^1,2 — 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.