Dresden 2017 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 17: Functional Materials I

MM 17.1: Vortrag

Montag, 20. März 2017, 15:45–16:00, IFW D

Fabrication of perovskite nano-rods in nanoporous anodic-aluminum oxide and their light harvesting characteristics — •Mirko Gabski, Martin Peterlechner, and Gerhard Wilde — Institute of Materials Physics, University of Münster, Germany

Anodic-aluminum oxide (AAO) membranes consist of a highly ordered uniform hexagonal pore arrangement with pore diameters from ∼10 to ∼200 nm, and a thickness between ∼10 nm and >100 µm [1]. AAO membranes are comparably cheap and easy to synthesize, thus excellent for the synthesis of quasi-one-dimensional nano-rods.

Organometal-trihalide perovskites are organo-metal salts which are used as sensitizer in dye-sensitized solar-cells and as a light harvester in solid-state thin-film perovskite solar-cells,

with efficiencies up to ∼20 % [2].

The aim of this work is the fabrication of light harvesting devices, consisting of an ordered array of perovskite nano-rods that operate as quasi-one-dimensional perovskite solar-cells in parallel circuit. The nano-scaled confinement should result in preferred direction for charge carrier transport. Deposition conditions and resulting structures are studied, applying co-evaporation or precipitation from a highly concentrated perovskite solution. Optimum process parameters leading to a maximum filling of the AAO are deduced.

References:

[1] Y. Lei, W. Cai, G. Wilde, Prog. Mater Sci. 52 (2007) 465-539

[2] H. Snaith, J. Phys. Chem. Lett. 2013, 4, 3623-3630