Assessing degradation in perovskite solar cells via thermal hysteresis of photocurrent and device simulation

IF 6.3 2区材料科学 Q2 ENERGY & FUELS

Solar Energy Materials and Solar Cells Pub Date : 2024-11-28 DOI:10.1016/j.solmat.2024.113319

Dhruba B. Khadka, Masatoshi Yanagida, Yasuhiro Shirai

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Abstract

Understanding the degradation mechanisms of perovskite solar cell (PSC) is paramount to addressing stability-related issues. Photocurrent loss is widely observed in the degraded PSC. Here, we investigate the degradation of PSC by probing the thermal hysteresis of photocurrent (THPC) and the dynamics of thermally active ionic or recombination processes. Degraded devices exhibit a considerably higher degree of variation in the photogenerated current, encompassing a broad spectrum of photo-induced ionic charge accumulation. THPC reveals changes driven by the accumulation of interfacial ionic charges and active defects under photo-thermal drifting, as supported by capacitance analysis. Device simulation corroborates that the interfacial surface defect formed at the interfacial layer in the device structure wields a substantial influence on device degradation, particularly in cases of photocurrent loss. This study underscores the direct correlation between the degradation of PSC and the presence of thermally activated traps and interfacial charge accumulation emphasizing the importance of passivating these pathways to improve device stability.

Abstract Image

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了解过氧化物太阳能电池（PSC）的降解机制对于解决稳定性相关问题至关重要。在降解的 PSC 中广泛观察到光电流损失。在此，我们通过探测光电流的热滞后（THPC）和热活性离子或重组过程的动态来研究 PSC 的降解。降解器件的光生电流变化程度更高，涵盖了光诱导离子电荷积累的广泛范围。THPC 揭示了光热漂移下界面离子电荷和活性缺陷积累所驱动的变化，电容分析也支持这种变化。器件模拟证实，在器件结构的界面层上形成的界面表面缺陷对器件降解具有重大影响，尤其是在光电流损失的情况下。这项研究强调了 PSC 退化与热激活陷阱和界面电荷积累之间的直接关系，并强调了钝化这些途径以提高器件稳定性的重要性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.