Microstructure engineering and conductivity optimization in silver films via Mixed Amine-MOD Ink

IF 4.6 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Synthetic Metals Pub Date : 2025-09-01 DOI:10.1016/j.synthmet.2025.117951

Yue Dong , Yuxin Dong , Xuan Tang , Zhimei Xu , Xiang Ke , Xuchun Wang

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Abstract

This study focuses on microstructure engineering by tailoring the composition of mixed-amine-based MOD (metal-organic decomposition) silver inks. By systematically varying the molar ratio of ethylamine (EA) and 1,2-diaminopropane (PDA) as complexing agents, we demonstrate a controllable approach to tuning the film morphology. The thermal behavior of the inks and the resulting silver films were analyzed in detail, including microstructure, porosity, mean particle size distribution, grain size, and resistivity. The use of mixed amines was found to significantly enhance particle packing density and reduce structural voids, which are critical for achieving high conductivity. Notably, at an EA:PDA molar ratio of 7:3, the silver films exhibited the most compact microstructure with minimal porosity and the lowest resistivity of 6.3 µΩ·cm when cured at 150 °C for 10 min. Furthermore, the printed lines demonstrated excellent mechanical stability, maintaining conductivity after 500 bending cycles. This work highlights the vital role of microstructure control in developing high-performance conductive films for flexible electronics.

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混合胺- mod油墨制备银膜的微结构工程及电导率优化

本研究的重点是微结构工程，通过定制混合胺基MOD（金属有机分解）银油墨的组成。通过系统地改变乙胺（EA）和1,2-二氨基丙烷（PDA）作为络合剂的摩尔比，我们展示了一种调节膜形态的可控方法。详细分析了油墨和银膜的热行为，包括微观结构、孔隙率、平均粒径分布、晶粒尺寸和电阻率。研究发现，混合胺的使用显著提高了颗粒堆积密度，减少了结构空隙，这是实现高导电性的关键。值得注意的是，当EA:PDA摩尔比为7:3时，在150°C固化10 min时，银膜的微观结构最致密，孔隙率最小，电阻率最低，为6.3µΩ·cm。此外，印刷线表现出优异的机械稳定性，在500次弯曲循环后保持导电性。这项工作强调了微结构控制在开发柔性电子高性能导电薄膜中的重要作用。

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

Synthetic Metals 工程技术-材料科学：综合

CiteScore

8.30

自引率

4.50%

发文量

189

审稿时长

33 days

期刊介绍： This journal is an international medium for the rapid publication of original research papers, short communications and subject reviews dealing with research on and applications of electronic polymers and electronic molecular materials including novel carbon architectures. These functional materials have the properties of metals, semiconductors or magnets and are distinguishable from elemental and alloy/binary metals, semiconductors and magnets.