Toggle Main Menu Toggle Search

Open Access padlockePrints

Temperature-Dependent Ambipolar Charge Carrier Mobility in Large-Crystal Hybrid Halide Perovskite Thin Films

Lookup NU author(s): Dr Pablo Docampo



This is the authors' accepted manuscript of an article that has been published in its final definitive form by American Chemical Society, 2019.

For re-use rights please refer to the publisher's terms and conditions.


© 2019 American Chemical Society.Perovskite-based thin-film solar cells today reach power conversion efficiencies of more than 22%. Methylammonium lead iodide (MAPI) is prototypical for this material class of hybrid halide perovskite semiconductors and at the focal point of interest for a growing community in research and engineering. Here, a detailed understanding of the charge carrier transport and its limitations by underlying scattering mechanisms is of great interest to the material's optimization and development. In this article, we present an all-optical study of the charge carrier diffusion properties in large-crystal MAPI thin films in the tetragonal crystal phase from 170 K to room temperature. We probe the local material properties of individual crystal grains within a MAPI thin film and find a steady decrease of the charge carrier diffusion constant with increasing temperature. From the resulting charge carrier mobility, we find a power law dependence of μ ∝ Tm with m = -(1.8 ± 0.1). We further study the temperature-dependent mobility of the orthorhombic crystal phase from 50 to 140 K and observe a distinctly different exponent of m = -(1.2 ± 0.1).

Publication metadata

Author(s): Biewald A, Giesbrecht N, Bein T, Docampo P, Hartschuh A, Ciesielski R

Publication type: Article

Publication status: Published

Journal: ACS Applied Materials and Interfaces

Year: 2019

Volume: 11

Issue: 23

Pages: 20838-20844

Print publication date: 12/06/2019

Online publication date: 17/05/2019

Acceptance date: 17/05/2019

Date deposited: 29/07/2019

ISSN (print): 1944-8244

ISSN (electronic): 1944-8252

Publisher: American Chemical Society


DOI: 10.1021/acsami.9b04592


Altmetrics provided by Altmetric


Funder referenceFunder name
Bavarian research network SolTech
EXC 2089/1