Enhanced water resistance of PEDOT:PSS through crosslinking agent incorporation for efficient and stable organic solar cells

IF 6.8 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Science China Materials Pub Date : 2025-03-14 DOI:10.1007/s40843-024-3273-2

Xin Shan (, ), Minghai Fang (, ), Liang Wu (, ), Hongchen Rong (, ), Qing Liao (, ), Deping Qian (, ), Meijin Lin (, )

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引用次数: 0

Abstract

Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) is a widely used anode interlayer (AIL) in organic solar cells (OSCs). However, the intrinsic acidity and hygroscopic nature of PSS ions in PEDOT:PSS have been proven to cause electrode corrosion and deteriorate device performance. Herein, a straightforward method is reported to enhance the water resistance of PEDOT:PSS by incorporating tris[bis(methoxymethyl)amino]-1,3,5-triazine (HM) as a cross-linker. The cross-linking reaction between PSS and HM neutralizes the acidity of PEDOT:PSS and forms a stable, hydrophobic network. Additionally, the aggregation morphology of PEDOT:PSS was regulated by HM, improving the conductivity and work function, thereby resulting in enhanced hole extraction and transport ability. Devices incorporating PEDOT:PSS-HM demonstrated improved power conversion efficiency (PCE) of 19.03% compared to 17.88% for those using standard PEDOT:PSS. The neutral pH and water-resistant nature of PEDOT:PSS-HM effectively improved the long-term stability of OSCs with a T₈₀ of over 400 h under continuous illumination. Moreover, after aging the PEDOT: PSS-HM film for 216 h at 80% relative humidity and 40 °C, it can be still used as AIL to fabricate efficient OSC devices. This work presents a simple and effective approach to preparing a non-corrosive and stable PEDOT derivative, offering valuable insights for the development of high-performance AIL materials.

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通过加入交联剂提高PEDOT:PSS的耐水性，用于高效稳定的有机太阳能电池

聚（3,4-乙烯二氧噻吩）：聚苯乙烯磺酸盐（PEDOT:PSS）是一种广泛应用于有机太阳能电池（OSCs）的阳极中间层（AIL）。然而，PSS离子在PEDOT:PSS中的固有酸性和吸湿性已被证明会导致电极腐蚀并降低器件性能。本文报道了一种简单的方法，通过加入三[双（甲氧基甲基）氨基]-1,3,5-三嗪（HM）作为交联剂来增强PEDOT:PSS的耐水性。PSS和HM之间的交联反应中和了PEDOT:PSS的酸性，形成了稳定的疏水网络。此外，HM调控了PEDOT:PSS的聚集形态，提高了其电导率和功函数，从而增强了其吸孔和输运能力。采用PEDOT:PSS- hm的器件的功率转换效率（PCE）提高了19.03%，而使用标准PEDOT:PSS的器件的功率转换效率为17.88%。PEDOT:PSS-HM的中性pH和耐水性有效提高了osc在连续光照下的长期稳定性，T80超过400 h。此外，PEDOT: PSS-HM薄膜在80%相对湿度和40℃下老化216 h后，仍可作为AIL用于制造高效的OSC器件。这项工作提出了一种简单有效的方法来制备无腐蚀性和稳定的PEDOT衍生物，为高性能AIL材料的开发提供了有价值的见解。

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

Science China Materials Materials Science-General Materials Science

CiteScore

11.40

自引率

7.40%

发文量

949

期刊介绍： Science China Materials (SCM) is a globally peer-reviewed journal that covers all facets of materials science. It is supervised by the Chinese Academy of Sciences and co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China. The journal is jointly published monthly in both printed and electronic forms by Science China Press and Springer. The aim of SCM is to encourage communication of high-quality, innovative research results at the cutting-edge interface of materials science with chemistry, physics, biology, and engineering. It focuses on breakthroughs from around the world and aims to become a world-leading academic journal for materials science.