Voidless metal lines sintered with intense pulsed light and their applications as transparent metal-mesh electrodes

Song, Soo Min; Cho, Sung Min

doi:10.1016/j.matchemphys.2023.127821

Cited by 1 publication

(1 citation statement)

References 28 publications

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“…Metal complex inks, also referred to as metal precursor inks or metal particle-free inks, are garnering significant interest due to their notable features, including simplicity in synthesis, low viscosity, and the absence of aggregation during preparation and storage. The choice of Cu complex ink over other metal complex inks for the recycling process in this study was motivated by its advantageous attributes: high conductivity, lower sintering temperature, cost-effectiveness, compatibility with flexible substrates, and its recent popularity in flexible printed electronics. − The recycling of Cu complex ink waste was attempted in a similar way to that for the NiO x NP ink using various solvents, including the same solvent as the initial ink solvent (ethanolamine/ethanol with a volume ratio of 1:2) for the washing step, as shown in Figure i–iv. Metallic Cu electrode patterns were successfully generated by the LDP process.…”

Section: Resultsmentioning

confidence: 99%

Recycling of Nanomaterial Ink Waste for Laser Digital Patterning Process

Binh Nam,

Kim,

Lee

2024

ACS Sustainable Chem. Eng.

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The laser digital patterning (LDP) process, also known as laser direct writing or laser selective patterning, offers a facile route to fabricating flexible/stretchable electronic devices from solution-processed thin films. Despite their various benefits, the deposition and washing steps associated with solution-processed thin films, specifically when using nanoinks such as nanoparticle (NP) ink and complex ink, inevitably produce nanomaterial waste. To address this issue, we propose a rapid and straightforward recycling process to reuse nanomaterial waste in the LDP process. The recycling process was demonstrated by retrieving NiO x NP ink waste generated during spin-coating and washing steps. Various solvents were utilized to retrieve and regenerate the nanoink. Remarkably, a recovery efficiency of over 90% was achieved for the NiO x NP ink even after multiple cycles. Comprehensive characterization was conducted on the recycled NP ink, comparing it with the originally synthesized NP ink using diverse analytical techniques. We also verified that the performance of the Ni electrode-based flexible heater manufactured using the recycled NiO x NP ink is nearly identical to that using the as-synthesized NP ink without any degradation. Additionally, we assessed the recyclability of Cu complex ink to determine which type of nanoink is more advantageous concerning material recycling for the LDP process. Our findings confirm that adopting NP ink presents an effective and sustainable strategy for diminishing nanomaterial waste during the LDP process.

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