Study of lead-free perovskite photoconverting structures by impedance spectroscopy

Article Materials Science, Multidisciplinary

Impedance spectroscopy for perovskite solar cells: characterisation, analysis, and diagnosis

Elizabeth von Hauff et al.

Summary: Impedance spectroscopy (IS) has great potential for characterising and diagnosing perovskite solar cells (PSC), but interpretation of the data is challenging due to the many dynamic processes involved. This study proposes a universal framework for IS analysis on PSC, which includes reviewing timescales for electrical and electrochemical dynamics and guidelines for obtaining high quality impedance spectra. The study also introduces a universal equivalent circuit model (ECM) that can be used to parameterise material properties and monitor loss mechanisms in PSC.

JOURNAL OF MATERIALS CHEMISTRY C (2022)

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Article Chemistry, Multidisciplinary

The Pitfalls and Opportunities of Impedance Spectroscopy of Lithium Sulfur Batteries

Sara Drvaric Talian et al.

Summary: The article summarizes the application of electrochemical impedance spectroscopy in studying lithium-sulfur batteries, highlighting potential pitfalls related to measurement parameters, impedance response interpretation, and spectra fitting. It critically evaluates available information on Li-S battery impedance response and discusses the methodology of impedance spectra fitting.

ADVANCED MATERIALS INTERFACES (2022)

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Review Chemistry, Multidisciplinary

Defects and stability of perovskite solar cells: a critical analysis

Leiping Duan et al.

Summary: Metal halide perovskite solar cells have achieved power conversion efficiencies exceeding 25.5%, similar to silicon solar cells, but their stability remains a challenge for commercialization due to degradation from external factors. Encapsulation can suppress degradation from oxygen and moisture, however, light and heat-induced degradation are still issues that need to be addressed for improved stability.

MATERIALS CHEMISTRY FRONTIERS (2022)

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Article Nanoscience & Nanotechnology

Highly Water-Stable Polymer-Perovskite Nanocomposites

Antonella Florencia Carrizo et al.

Summary: The study demonstrates that polymer composite lead-halide perovskite nanocrystals (NCs) can achieve high fluorescence yield and complete water resistance, with PSU polymer playing a key role in enhancing the water stability of the fluorescent films.

ACS APPLIED MATERIALS & INTERFACES (2021)

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Editorial Material Multidisciplinary Sciences

Comment on Resolving spatial and energetic distributions of trap states in metal halide perovskite solar cells

Sandheep Ravishankar et al.

Summary: The results reported by Ni et al. are not actual trap densities, but rather a consequence of geometrical capacitance and charge injection into the perovskite layer.

SCIENCE (2021)

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Article Physics, Applied