4.7 Article

Degradation Analysis of Triple-Cation Perovskite Solar Cells by Electrochemical Impedance Spectroscopy

期刊

ACS APPLIED ENERGY MATERIALS
卷 -, 期 -, 页码 -

出版社

AMER CHEMICAL SOC
DOI: 10.1021/acsaem.2c02161

关键词

perovskite solar cells; impedance spectroscopy; charge transport; recombination; stability; degradation; ion movement

资金

  1. Spanish Ministry of Economy, Industry and Competitiveness
  2. Universidad Aut?noma de Zacatecas
  3. [Formaci?n FJC2019-041835-I]

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In this study, the electrical properties of different triple-cation compositions of perovskite solar cells were analyzed using electrochemical impedance spectroscopy. The reduction of ion vacancies was found to improve the stability and durability of the cells.
In this work, the electrical properties of different triple-cation compositions with the formula Cs0.05FA1-XMAXPb-(I1-XBrX)3 have been analyzed using electrochemical impedance spectroscopy. The perovskite solar cells were subjected to ambient conditions to compare their results in terms of ambient degradation. Their morphology, optical properties, and photo-voltaic performance were characterized. We analyzed the causes and effects of ambient degradation mechanisms on the devices. Electrochemical processes such as ion movement, a combination of radiative recombination and nonradiative recombination, and charge transport were detected. The MA percentage decrease in the composition of triple-cation perovskites, APbX3 produces an improvement in the stability and durability of perovskite solar cells. This enhancement is due to the reduction of the amount of ion vacancies helping to reduce the degradation in the device by avoiding the accumulation of defects.

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