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  Laser-induced carbonization of natural organic precursors for flexible electronics

Delacroix, S., Wang, H., Heil, T., & Strauß, V. (2020). Laser-induced carbonization of natural organic precursors for flexible electronics. Advanced Electronic Materials, 2000463. doi:10.1002/aelm.202000463.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-F84E-C Version Permalink: http://hdl.handle.net/21.11116/0000-0006-F84F-B
Genre: Journal Article

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 Creators:
Delacroix, Simon1, Author              
Wang, Huize1, Author              
Heil, Tobias2, Author              
Strauß, Volker3, Author              
Affiliations:
1Volker Strauß, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_3025555              
2Nadezda V. Tarakina, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_2522693              
3Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863288              

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Free keywords: carbon circuits, electrical impedance, flexible electronics, laser carbonization, laser patterning
 Abstract: Abstract A precursor ink for carbon laser-patterning is developed using inexpensive, naturally abundant molecular compounds, namely citric acid and urea, and used to fine-print conductive carbon circuits on a flexible substrate. The precursor in the ink consists of organic nanoparticles obtained from the thermal treatment of citric acid and urea. This precursor is thoroughly characterized chemically and structurally. A simple recipe for the ink is then described for the creation of highly reproducible laser-patterned carbon structures on different substrates. Homogeneous ∼20 µm thick films are cast on different substrates and characterized before and after laser-carbonization. The carbon content of the final films is 97% and is of turbostratic graphitic nature. As reproducible laser-induced reactions depend on precise laser conditions, the influence of material properties, film thickness, and laser fluence are thoroughly analyzed. Films on three different substrates, namely aluminum sheets, silicon wafers, and polyethylene terephthalate (PET) are characterized by electrical impedance measurements. Electrical conductivities of up to 5.21 S cm−1 and maximum current densities of 44 A cm−2 are achieved, which proved applicable as fine carbon circuits on PET as a flexible substrate. This study opens a simple synthetic avenue to producing conductive circuit elements based on carbon.

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Language(s): eng - English
 Dates: 2020-09-03
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1002/aelm.202000463
Other: OA Liste?
 Degree: -

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Title: Advanced Electronic Materials
  Abbreviation : Adv. Electron. Mater.
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: - Volume / Issue: - Sequence Number: 2000463 Start / End Page: - Identifier: ISSN: 2199-160X