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Updated: Mar 7, 2026

Electrochemical Impedance Spectroscopy as a Tool for Electrochemical Rate Constant Estimation
Published on: October 10, 2018
Electrochemical impedance analysis of perovskite-electrolyte interfaces
Zhen Li1, Candy C Mercado2, Mengjin Yang1
1National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, CO 80401, USA. zhen.li@nrel.gov.
Abstract:
The flat band potentials and carrier densities of spin coated and sprayed MAPbI3, FA0.85Cs0.15PbI3, and MAPbBr3 perovskite films were determined using the Mott-Schottky relation. The films developed a space charge layer and exhibited p-type conduction with a carrier concentration of ∼1016 cm-3 for spin coated films. Electrochemical impedance spectra showed typical space charge impedance at frequencies >1 kHz, and an exceptional high capacitance at frequency <1 kHz owing to an ion diffusion component.
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