Excimer laser patterning of PEDOT:PSS thin-films on flexible barrier foils: A surface analysis study

Naithani, Sanjeev; Schaubroeck, David; Vercammen, Yannick; Mandamparambil, Rajesh; Yakimets, Iryna; Vaeck, Luc Van; Steenberge, Geert Van

doi:10.1016/j.apsusc.2013.05.018

Cited by 7 publications

(4 citation statements)

References 21 publications

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“…Also the Carbon (C) content has been reduced widely in the ablated area (bottom) as compared to non-ablated area (top), and the remaining carbon may correspond to impurities. A more detailed investigation can be carried out by using Time-of-Flight Static Secondary Ion Mass Spectroscopy (TOF-S-SIMS) [14], as an analytical method to analyze the outermost molecular surface layer of the ablated area after thin films removal from the substrate.…”

Section: Bpapf αNpb and Hdr014 Nanosecond Laser Patterningmentioning

confidence: 99%

Mid-infrared resonant ablation for selective patterning of thin organic films

Naithani¹,

Duterte²,

Levichkova³

et al. 2014

Laser Sources and Applications II

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The fast growing market of organic electronics, including organic photovoltaics (OPV), stimulates the development of versatile technologies for structuring thin-film materials. Ultraviolet lasers have proven their full potential for patterning single organic layers, but in a multilayer organic device the obtained layer selectivity is limited as all organic layers show high UV absorption. In this paper, we introduce mid-infrared (IR) resonant ablation as an alternative approach, in which a short pulse mid-infrared laser can be wavelength tuned to one of the molecular vibrational transitions of the organic material to be ablated. As a result, the technique is selective in respect of processing a diversity of organics, which usually have different infrared absorption bands. Mid-IR resonant ablation is demonstrated for a variety of organic thin films, employing both nanosecond (15 ns) and picosecond (250 ps) laser pulses tunable between 3 and 4 microns. The nanosecond experimental set-up is based on a commercial laser at 1064 nm pumping a singly resonant Optical Parametric Oscillator (OPO) built around a Periodically-Poled Lithium Niobate (PPLN) crystal with several Quasi-Phase Matching (QPM) periods, delivering more than 0.3 W of mid-IR power, corresponding to 15 µJ pulses. The picosecond laser set-up is based on Optical Parametric Amplification (OPA) in a similar crystal, allowing for a comparison between both pulse length regimes.The wavelength of the mid-infrared laser can be tuned to one of the molecular vibrational transitions of the organic material to be ablated. For that reason, the IR absorption spectra of the organic materials used in a typical OPV device were characterized in the wavelength region that can be reached by the laser setups. Focus was on OPV substrate materials, transparent conductive materials, hole transport materials, and absorber materials. The process has been successfully demonstrated for selective thin film patterning, and the influence of the various laser parameters is discussed.

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Section: Bpapf αNpb and Hdr014 Nanosecond Laser Patterningmentioning

confidence: 99%

Mid-infrared resonant ablation for selective patterning of thin organic films

Naithani¹,

Duterte²,

Levichkova³

et al. 2014

Laser Sources and Applications II

Self Cite

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“…Gel permeation chromatography (GPC) or SEC, in this case, is not possible due to the negligible solubility in most common laboratory GPC compatible solvents and the high charge of the polymeric chain; nonetheless, only a few examples of mass spectrometry using MALDI techniques are available in the literature [ 94 , 95 ]. It is worthy to mention, that since the radical nuclear magnetic resonance is not possible on bare PEDOT, its molecular weight remains unclear.…”

Section: Introduction Of Conductive Polymersmentioning

confidence: 99%

Carbon Nanomaterials Embedded in Conductive Polymers: A State of the Art

et al. 2021

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Carbon nanomaterials are at the forefront of the newest technologies of the third millennium, and together with conductive polymers, represent a vast area of indispensable knowledge for developing the devices of tomorrow. This review focusses on the most recent advances in the field of conductive nanotechnology, which combines the properties of carbon nanomaterials with conjugated polymers. Hybrid materials resulting from the embedding of carbon nanotubes, carbon dots and graphene derivatives are taken into consideration and fully explored, with discussion of the most recent literature. An introduction into the three most widely used conductive polymers and a final section about the most recent biological results obtained using carbon nanotube hybrids will complete this overview of these innovative and beyond belief materials.

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“…Time-of-flight secondary ion mass spectrometry (ToF-SIMS) is an appropriate analytical technique to study multilayer structures with high depth (1 nm) and lateral (< 100 nm) resolution. ToF-SIMS has been extensively used in organic electronics, over the years, in order to characterize OLEDs [13,14,15], OFETs [16], and organic solar cells [17,18]. More in general, secondary ion mass spectrometry is widely adopted to study surface modification [15,19,20] of semiconductor materials and devices through ToF-SIMS experiments in the so called "static mode".…”

Section: Introductionmentioning

confidence: 99%

“…ToF-SIMS has been extensively used in organic electronics, over the years, in order to characterize OLEDs [13,14,15], OFETs [16], and organic solar cells [17,18]. More in general, secondary ion mass spectrometry is widely adopted to study surface modification [15,19,20] of semiconductor materials and devices through ToF-SIMS experiments in the so called "static mode". In addition, decomposition [21], contamination [22], diffusion phenomena [13,22] in organic electronic devices are usually investigated with depth profiling experiments.…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Chemical Mapping of OTFT on Modified Hydrophobic Flexible Polymeric Substrate by Low Energy Cs+ Ion Sputtering

Tortora¹,

Urbini²,

Barra³

et al. 2018

Preprint

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Here, electron-transporting semiconducting organic channels made of N,N′-1H, 1H-perfluorobutyl dicyanoperylenecarboxydiimmide (PDIF-CN2) molecules were thermally evaporated on flexible polyethylene-naphtalate (PEN) plastic substrates equipped with gold (Au) electrodes. This multilayer structure represents the basic component for the fabrication of staggered top-gate n-type organic thin-film transistors (OTFTs) to be completed with the addition of a polymeric dielectric layer and an aluminum gate electrode. PEN substrate was treated with hexamethyldisilazane (HMDS) in order to make it more hydrophobic. Indeed, the hydrophobized surface of the plastic substrate was shown to induce a more ordered supramolecular structure of the semiconductor layer during the evaporation process. The hybrid organic/inorganic formally trilayer non-passivated OTFT structure was successfully profiled in a single run through ToF-SIMS depth profiling experiments with low energy cesium ions. High mass molecular fragment ions were obtained and used as indicators of interfaces, leading to an increase of information on molecular specificity. The HMDS surface modification was clearly detected and spatially located. Finally, a chemometric approach was also adopted to evaluate depth profiling data. In particular, principal component analysis (PCA) and K-means algorithm were tested as innovative method for the identification of molecular fragments useful for the OTFT multi-layer structure characterization and the determination of the number of OTFT layers, respectively.

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Excimer laser patterning of PEDOT:PSS thin-films on flexible barrier foils: A surface analysis study

Cited by 7 publications

References 21 publications

Mid-infrared resonant ablation for selective patterning of thin organic films

Mid-infrared resonant ablation for selective patterning of thin organic films

Carbon Nanomaterials Embedded in Conductive Polymers: A State of the Art

Three-Dimensional Chemical Mapping of OTFT on Modified Hydrophobic Flexible Polymeric Substrate by Low Energy Cs+ Ion Sputtering

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