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UV-Sinterable Silver Oxalate-Based Molecular Inks and Their Application for In-Mold Electronics
Advanced Electronic Materials ( IF 6.2 ) Pub Date : 2021-07-18 , DOI: 10.1002/aelm.202100194
Xiangyang Liu 1 , Derek Li 1 , Hiroshi Fukutani 2 , Paul Trudeau 3 , LoleÏ Khoun 3 , Olga Mozenson 1 , Kathleen L. Sampson 1 , Mary Gallerneault 1 , Chantal Paquet 1 , Thomas Lacelle 1 , Bhavana Deore 1 , Olivier Ferrand 4 , Julie Ferrigno 4 , Patrick R. L. Malenfant 1 , Arnold J. Kell 1
Affiliation  

A new broadband UV light-based processing method for a screen printable silver oxalate molecular ink is developed that enables structural electronics to be produced on complex thermoformed 3D objects. The production of these 3D devices is driven by the light-induced reduction of silver oxalate to form an interfacial silver nanoparticle layer that allows the ink to transition to a viscous liquid intermediate and elongate up to 50% without cracking during thermoforming. Ultimately, this enables the development of 3D electronics devices with significantly less limitations on geometry, shape, size, and depth in comparison to commercially available inks. UV processing is also effective for 2D traces on low temperature PET substrate, where in situ produced silver nanoparticles can subsequently absorb light and further facilitate the rapid conversion of the silver oxalate to metallic silver through a self-limiting thermal decomposition. The resulting traces have superior electrical properties and are produced in significantly less time in comparison to thermal sintering. Together, UV processing and the silver oxalate molecular ink serve as a platform for both the rapid production of conductive silver traces on low temperature substrates and the development of novel thermoformed 3D human-machine interface devices, areas of interest for both academia and industry.

中文翻译:

紫外可烧结草酸银基分子油墨及其在模内电子产品中的应用

开发了一种新的基于宽带紫外线的丝网印刷草酸银分子墨水处理方法,可以在复杂的热成型 3D 物体上生产结构电子器件。这些 3D 设备的生产由草酸银的光诱导还原驱动,以形成界面银纳米颗粒层,使油墨转变为粘性液体中间体,并在热成型过程中伸长至 50% 而不会破裂。最终,与市售墨水相比,这使得 3D 电子设备的开发在几何、形状、尺寸和深度方面的限制显着减少。UV 处理对于低温 PET 基材上的 2D 迹线也很有效,其中原位产生的银纳米粒子可以随后吸收光,并通过自限性热分解进一步促进草酸银快速转化为金属银。与热烧结相比,所得迹线具有优异的电气特性,并且在更短的时间内生产。UV 处理和草酸银分子墨水共同作为在低温基材上快速生产导电银迹线和开发新型热成型 3D 人机界面设备的平台,这是学术界和工业界都感兴趣的领域。
更新日期:2021-09-10
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