Electric-field-induced aging dynamics of triple-cation lead iodide perovskite at nanoscale

IF 6.3 2区材料科学 Q2 ENERGY & FUELS Solar Energy Materials and Solar Cells Pub Date : 2024-12-03 DOI:10.1016/j.solmat.2024.113305

Nikita A. Emelianov , Victoria V. Ozerova , Yuri S. Fedotov , Elena V. Shchurik , Nikita A. Slesarenko , Mikhail V. Zhidkov , Eugeniy V. Golosov , Rasim R. Saifutyarov , Lyubov A. Frolova , Pavel A. Troshin

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Abstract

Herein, we report the nanoscale cations dynamics in Cs_0.1MA_0.15FA_0.75PbI₃ films during the electric-field-induced aging process using infrared scattering scanning near-field microscopy (IR s-SNOM) combined with a series of complementary analytical techniques such as PL-microscopy, SEM/EDX and ToF-SIMS. The revealed major field-induced aging pathways are related to the anodic oxidation of I⁻ and the cathodic reduction of MA⁺ and FA⁺, which finally result in the depletion of organic species in the device channel and the formation of metallic lead. FA⁺ cations show significantly higher stability with respect to electrochemical reduction as compared to MA⁺ cations. Formamidinium cations are preserved on the surface of the near-cathode film area even after 40 days of the 1 V/μm field exposure, while MA⁺ cations demonstrate complete decomposition after 24 days. The obtained results demonstrate that IR s-SNOM represents a powerful technique for studying the spatially resolved field-induced degradation dynamics of hybrid perovskite absorbers and the identification of more promising materials resistant to the electric field.

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来源期刊

Solar Energy Materials and Solar Cells 工程技术-材料科学：综合

CiteScore

12.60

自引率

11.60%

发文量

513

审稿时长

47 days

期刊介绍： Solar Energy Materials & Solar Cells is intended as a vehicle for the dissemination of research results on materials science and technology related to photovoltaic, photothermal and photoelectrochemical solar energy conversion. Materials science is taken in the broadest possible sense and encompasses physics, chemistry, optics, materials fabrication and analysis for all types of materials.