Enhanced surface coverage and conductivity of Cu complex ink-coated films by laser sintering

Lee, Jeonghyeon; Lee, Byoung-Yoon; Jeong, Sooncheol; Kim, Yoonhyun; Lee, Myeongkyu

doi:10.1016/j.tsf.2014.06.005

Cited by 14 publications

(13 citation statements)

References 16 publications

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“…Significant decrease in resistivity was achieved by further increasing the curing time to 30 min. After that, the resistivity decreases moderately and reaches 15 μΩ·cm at 60 min curing, which was approximately 10 times the resistivity of bulk silver and is comparable to other researchers [18][19][20]. Clearly, the formation of a low resistivity silver pattern at a mild curing temperature has been achieved by using the synthesized silver oxalate ink.…”

Section: Effects Of Post-heat Treatment On Microstructure and Resistisupporting

confidence: 81%

“…The critical issue that needs to be addressed when inkjet printing is applied to these applications is ink development. Previously, conductive inks based on silver [6][7][8][9][10][11][12][13][14][15][16][17][18], copper [19], carbon [20], and conductive polymers [21] have been demonstrated, among which, silverbased ink has received great interests because of excellent conductivity and anti-oxidation properties of bulk silver. To date, two kinds of silver inks have been adopted for inkjet printing conductive patterns on substrates.…”

Section: Introductionmentioning

confidence: 99%

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Facile synthesis of high silver content MOD ink by using silver oxalate precursor for inkjet printing applications

Dong

Liu

et al. 2015

Thin Solid Films

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Section: Effects Of Post-heat Treatment On Microstructure and Resistisupporting

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Facile synthesis of high silver content MOD ink by using silver oxalate precursor for inkjet printing applications

Dong

Liu

et al. 2015

Thin Solid Films

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“…Subsequently, Lee et al published a morphological comparison of laser and thermal sintering of Cu films-while the laser sintered films were denser and thinner with a more uniform microstructure, the thermally sintered films exhibited better crystalline qualities which resulted in lower resistivities on PI substrates (1 = 1.70 10 À7 W m and 1.92 10 À7 W m for thermal and laser sintered films, respectively). [89] Pre-drying of the ink before sintering was found to be an essential step for both thermal and laser sintering. Interestingly, for both thermally sintered thinner and thicker films, films sintered at 150 8C (1 = 1.70 10 À7 W m) were more conductive than those at higher temperatures, with the authors attributing this abnormal behaviour to the internal morphology and surface coverage of the annealed films.…”

Section: Copper Mod Inksmentioning

confidence: 99%

MODs vs. NPs: Vying for the Future of Printed Electronics

Douglas

Mrig

Knapp

2021

Chemistry A European J

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This Minireview compares two distinct ink types, namely metal-organic decomposition (MOD) and nanoparticle (NP) formulations, for use in the printing of some of the most conductive elements: silver, copper and aluminium. Printing of highly conductive features has found purpose across a broad array of electronics and as processing times and temperatures reduce, the avenues of application expand to low-cost flexible substrates, materials for wearable devices and beyond. Printing techniques such as screen, aerosol jet and inkjet printing are scalable, solutionbased processes that historically have employed NP formula-tions to achieve low resistivity coatings printed at high resolution. Since the turn of the century, the rise in MOD inks has vastly extended the range of potentially applicable compounds that can be printed, whilst simultaneously addressing shelf life and sintering issues. A brief introduction to the field and requirements of an ink will be presented followed by a detailed discussion of a wide array of synthetic routes to both MOD and NP inks. Unindustrialized materials will be discussed, with the challenges and outlook considered for the market leaders: silver and copper, in comparison with the emerging field of aluminium inks.

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“…They were pure N 2 environment experiment and showed longer sintering time such as about a half second. 17,18 However N 2 costs more than air environment and faster sintering time means higher productivity. In this paper, the Cu based MOD ink was sintered by laser in ambient air condition.…”

Section: -5mentioning

confidence: 99%

Electrical behavior of laser-sintered Cu based metal-organic decomposition ink in air environment and application as current collectors in supercapacitor

Rho

Kang

et al. 2015

Int. J. of Precis. Eng. and Manuf.-Green Tech.

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Cu based metal-organic decomposition (MOD) ink has been preferred as a printable conductive material in the field of printed electronics because it can mitigate the formation of undesired Cu oxide or precipitation of the metal source during storage and printing. However there will be oxidation of Cu during sintering process in air environment, for fabrication of conductive track from printed ink. In this paper, possibility of laser-sintering of Cu MOD ink in air was studied. The Cu MOD ink was spin-coated on polyimide (PI) substrate. The laser with 355 nm wavelength was accommodated as a heat source in this study. The parametric study with various laser power intensities and scan rates, showed 230-557 W/cm 2 and 1-8 mm/s as the feasible laser-sintering process window. As a result, the specific resistance of the laser-sintered Cu MOD ink was achieved 21 µΩcm which was about 10 times as much as that of bulk Cu. As an application, laser-sintered Cu MOD ink was confirmed to give acceptable performances compared to traditional Cu sheet electrodes as flexible current collectors of the supercapacitor.

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Enhanced surface coverage and conductivity of Cu complex ink-coated films by laser sintering

Cited by 14 publications

References 16 publications

Facile synthesis of high silver content MOD ink by using silver oxalate precursor for inkjet printing applications

Facile synthesis of high silver content MOD ink by using silver oxalate precursor for inkjet printing applications

MODs vs. NPs: Vying for the Future of Printed Electronics

Electrical behavior of laser-sintered Cu based metal-organic decomposition ink in air environment and application as current collectors in supercapacitor

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