Deciphering halide ion migration and performance loss in wide-bandgap perovskite solar cells: connection, mechanism, and solutions

IF 30.8 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Energy & Environmental Science Pub Date : 2025-08-13 DOI:10.1039/D5EE03136B

Yuxiao Guo, Hairen Tan and Bo Xu

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Abstract

Wide-bandgap (WBG, ≥1.60 eV) mixed-halide perovskites with tunable bandgaps are pivotal for advancing tandem photovoltaics (PVs). However, WBG perovskite solar cells (PSCs) suffer from severe performance loss, often directly linked to halide ion migration (HIM). While strategies to suppress HIM have improved device properties, the underlying relation between HIM and device performance remains ambiguous and contentious. In this minireview, we summarize and evaluate the origins of voltage (V_OC) and current (J_SC) losses and critically assess their correlation with HIM-driven issues, such as phase heterogeneity and carrier funneling. Furthermore, we propose research priorities to resolve this matter in a nutshell: (i) mechanistic investigation of iodide(I)-rich terminal (∼1.60 eV) domains, including spatiotemporal resolved mapping and interfacial carrier dynamics and (ii) regulation strategies, such as additive and interface engineering, to mitigate adverse effects caused by HIM. By elucidating the mechanistic interplay between HIM and performance decay, this work aims to offer more powerful guidance for efficient and photostable WBG perovskite-related PVs.

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解读宽带隙钙钛矿太阳能电池中卤化物离子迁移和性能损失：联系、机制和解决方案

具有可调带隙的宽禁带（WBG,≥1.60 eV）混合卤化物钙钛矿是推进串联光伏（pv）的关键。然而，WBG钙钛矿太阳能电池（PSCs）遭受严重的性能损失，通常直接与卤化物离子迁移（HIM）有关。虽然抑制HIM的策略改善了器件性能，但HIM与器件性能之间的潜在关系仍然模糊且有争议。在这篇小型综述中，我们总结和评估了电压（VOC）和电流（JSC）损耗的来源，并严格评估了它们与hims驱动的最坏情况（如相位非均质性和载流子漏斗）的相关性。此外，我们提出了解决这一问题的研究重点：(i)对富碘(i)端（~1.60 eV）域的机理研究，如时空分辨映射和界面载流子动力学；（二）通过增材工程和界面工程的调节策略来减轻HIM的不利影响。通过阐明HIM与性能衰减之间的机制相互作用，本工作旨在为高效和光稳定的WBG钙钛矿相关pv提供更有力的指导。

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

Energy & Environmental Science 化学-工程：化工

CiteScore

50.50

自引率

2.20%

发文量

349

审稿时长

2.2 months

期刊介绍： Energy & Environmental Science, a peer-reviewed scientific journal, publishes original research and review articles covering interdisciplinary topics in the (bio)chemical and (bio)physical sciences, as well as chemical engineering disciplines. Published monthly by the Royal Society of Chemistry (RSC), a not-for-profit publisher, Energy & Environmental Science is recognized as a leading journal. It boasts an impressive impact factor of 8.500 as of 2009, ranking 8th among 140 journals in the category "Chemistry, Multidisciplinary," second among 71 journals in "Energy & Fuels," second among 128 journals in "Engineering, Chemical," and first among 181 scientific journals in "Environmental Sciences." Energy & Environmental Science publishes various types of articles, including Research Papers (original scientific work), Review Articles, Perspectives, and Minireviews (feature review-type articles of broad interest), Communications (original scientific work of an urgent nature), Opinions (personal, often speculative viewpoints or hypotheses on current topics), and Analysis Articles (in-depth examination of energy-related issues).