Radical Scavenger-Driven Oxidation Prevention and Structural Stabilization for Efficient and Stable Tin-Based Perovskite Solar Cells

IF 32.4 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Energy & Environmental Science Pub Date : 2025-05-07 DOI:10.1039/d5ee00735f

Seungon Jung, Yunjeong Jang, Hohyun Jung, Yujin Kim, Eunbin Son, Seulgi Jeong, Yihan Zhang, Joohoon Kang, Jeong Min Baik, Jianfeng Lu, Hyesung Park

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引用次数: 0

Abstract

Tin (Sn)-based perovskite solar cells (PSCs) have emerged as promising alternatives to lead-based PSCs owing to their lower toxicity and desirable optoelectronic properties. However, the instability of Sn-based perovskites and the vulnerability of the hole-transport layer (HTL), particularly poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), under oxidative environments remain significant challenges. In this study, we incorporated 4-hydroxy-2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPOL) as a radical scavenger at the HTL/perovskite interface in p–i–n PSCs to suppress Sn²⁺ oxidation through its radical scavenging properties, promote controlled growth of Sn-based perovskite films, and stabilize PEDOT:PSS by mitigating oxidative degradation. These effects resulted in improved crystallinity and reduced recombination losses leading to enhanced device performance. The power conversion efficiency of the PSCs increased from 11.08% to 13.42% upon the incorporation of TEMPOL, accompanied by improved operational stability. This study offers a promising route for addressing the key issues of Sn-based PSCs, paving the way for durable and efficient lead-free PSCs.

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高效稳定锡基钙钛矿太阳能电池的自由基清除剂驱动氧化预防和结构稳定

锡（Sn）基钙钛矿太阳能电池（PSCs）由于其较低的毒性和理想的光电性能而成为铅基PSCs的有希望的替代品。然而，锡基钙钛矿的不稳定性和空穴传输层（HTL），特别是聚（3,4-乙烯二氧噻吩）：聚苯乙烯磺酸盐（PEDOT:PSS）在氧化环境下的脆弱性仍然是一个重大挑战。在本研究中，我们在p-i-n PSCs中加入4-羟基-2,2,6,6-四甲基哌啶-1-氧基（TEMPOL）作为自由基清除剂，通过其自由基清除性能抑制Sn2+氧化，促进sn基钙钛矿膜的可控生长，并通过减轻氧化降解来稳定PEDOT:PSS。这些效应改善了结晶度，减少了复合损失，从而提高了器件性能。加入TEMPOL后，PSCs的功率转换效率从11.08%提高到13.42%，并提高了运行稳定性。本研究为解决锡基PSCs的关键问题提供了一条有希望的途径，为实现耐用、高效的无铅PSCs铺平了道路。

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).