Dresden 2017 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 21: Fundamentals of Perovskite Photovoltaics II (joint session CPP/DS/HL)

HL 21.1: Hauptvortrag

Montag, 20. März 2017, 15:00–15:30, ZEU 222

Visualizing Charge Carrier Diffusion In Hybrid Halide Perovskite Thin Films — •Achim Hartschuh, Kathrin Handloser, Irene Grill, Nicolai Hartmann, Nadja Giesbrecht, Meltem Aygüler, Mathhias Handloser, Thomas Bein, and Pablo Docampo — Department of Chemistry and CeNS, LMU Munich, 81377 Munich, Germany

Organic-inorganic metal halide perovskites represent one of the most promising classes of absorber materials for future photovoltaic applications [1]. A prerequisite for the efficient extraction of photo-generated carriers is the combination of low non-radiative relaxation rates and rapid diffusive transport. We study the excited state dynamics and charge carrier transport properties in different perovskite thin films using time-resolved photoluminescence microscopy. By scanning the confocal detection with respect to the excitation spot, we visualize diffusive transport on micrometer length scales and determine the charge carrier diffusion constants and mobilities [2]. We complement these studies by transient photocurrent measurements on the same films and derived devices [3,4].