Detecting and identifying reversible changes in perovskite solar cells by electrochemical impedance spectroscopy.

ABSTRACT: The current status of electrochemical impedance spectroscopy (EIS) and related analysis on perovskite solar cells (PSC) is still unsatisfactory. The provided models are still vague and not really helpful for guiding the efforts to develop more efficient and stable devices. Due to the slow and complex dynamics of these devices, the obtained spectra need to be validated, which is hardly ever done. This study may be the first to provide fully validated impedance spectra and presents reproducible EIS time series at open circuit voltage (V _OC) for more than 20 hours, with a total of 140 analysed spectra. We conclude that the observed changes stem from a temporary reduction of the electronically active area of the devices, as can be deduced from the inverse behaviour of resista

SUBMITTER: Klotz D 

PROVIDER: S-EPMC9073281 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature