Fully printed integrated circuits from solution processable polymers

Knobloch, A.; Manuelli, Alessandro; Bernds, A.; Clemens, W.

doi:10.1063/1.1767291

Cited by 114 publications

(69 citation statements)

References 15 publications

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“…Recent studies have reported on OTFT devices fabricated entirely or partially with printing methods such as gravure printing, transfer printing, and inkjet printing. [6][7][8][9][10][11][12][13][14][15][16][17][18] However, the spatial resolution of these printing methods above is in the range of 10-100 µm, [19] which is not fine enough to fabricate short-channel high-speed OTFTs. Reverse offset printing is a unique method providing for high-resolution features, submicron in scale.…”

Section: Doi: 101002/aelm201700313mentioning

confidence: 99%

Organic Complementary Inverter Circuits Fabricated with Reverse Offset Printing

Takeda

Yoshimura

Shiwaku

et al. 2017

Adv Elect Materials

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OTFT technology has the potential to produce integrated circuits such as microprocessors [24] and amplifier circuits [25] with high mechanical flexibility. In particular, complementary integrated circuits combining both p-type and n-type OTFT devices possess many advantages including low power consumption in steady state operation, full-swing logic circuit output, and high noise margin. For these reasons, realizing complementary integrated circuits using reverse offset printing is highly desired, although the fabrication processes and device structures for them have not been fully established.In this study, we demonstrate organic complementary inverter circuits with a stacked structure using fully printed electrodes formed with reverse offset printing. Reverse offset printing and a silver nanoparticle inks sinterable at low temperature were adopted for the precise patterning of source, drain (S/D), and gate electrodes. The p-type and n-type semiconductor layers were also fabricated from solution, and exhibited effective mobilities of 0.41 and 0.2 cm 2 V −1 s −1 , respectively. The complementary inverter circuits using these OTFTs operated at a low supply voltage of 2.5 V with a gain of 14 and achieved high signal gain up to 25 at supply voltage 10 V.The silver (Ag) electrodes were patterned on a glass substrate using reverse offset printing with the process flow depicted in Figure 1a. There are three main steps in the reverse offset printing process: coating, patterning, and transfer. First, the silver ink was coated on the polydimethylsiloxane blanket with a slit coater (step 1: coating). Next, the unnecessary areas were removed from the blanket with a glass printing plate (step 2: patterning). Finally, the silver ink on the blanket was transferred to the substrate (step 3: transfer). Two kinds of silver nanoparticle inks sinterable at 120 °C were used for the source and drain (RAGT-36, DIC) and gate (RAGT-28, DIC) electrodes. Since the drying time between each step is an important factor for realizing high-resolution patterns, [22] the drying time was optimized for Ag nanoparticles. The thickness of the silver layers was controlled by the coating speed in the Step 1.The surface profile and the patterning resolution of the printed electrodes were evaluated using a stylus-type surface profiler (Dektak XT, Bruker) and an optical microscope. The cross-sectional profile (Figure 1b) indicates that the printed electrodes had uniform thicknesses of 100 nm, a flat top p-Type and n-type organic thin film transistors (OTFTs) and complementary inverter circuits with finely patterned electrodes are fabricated by reverse offset printing. The electrodes achieve a channel length of less than 3 µm under optimized printing conditions. High-performance OTFTs are fabricated using these electrodes and printed p-type and n-type organic semiconductors, each achieving a mobility of 0.2 cm 2 V −1 s −1 at a channel length of 50 µm. A complementary inverter circuit fabricated with a stacked OTFT structure is demonstrated using reverse o...

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Section: Doi: 101002/aelm201700313mentioning

confidence: 99%

Organic Complementary Inverter Circuits Fabricated with Reverse Offset Printing

Takeda

Yoshimura

Shiwaku

et al. 2017

Adv Elect Materials

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“…[4] Stretched polymer chains may provide valuable candidates for nanowires in microcircuits. [6] Therefore a minimalistic model, as the simple FENE dumbbell model, is useful in order to map the behaviour of a complex system and to predict the qualitative trends in various flow situations.…”

Section: Resultsmentioning

confidence: 99%

“…[4] For example, shear flow generates stretched polymer chains which can be used for microcircuit construction from single molecules. [5,6] Experimentally, polymers under shear flow have been investigated for many decades. [7,8,9,10,11,12,13,14,15,16,17,18] Due to both an elongational and a rotational components stemming from the flow inhomogeneity, the dynamics or statistics of sheared molecules is complex.…”

Section: Introductionmentioning

confidence: 99%

Statistics of polymer adsorption under shear flow

Messina

Löwen

2010

The Journal of Chemical Physics

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Using non-equilibrium Brownian dynamics computer simulations, we have investigated the steady state statistics of a polymer chain under three different shear environments: i) linear shear flow in the bulk (no walls), ii) shear vorticity normal to the adsorbing wall, iii) shear gradient normal to the adsorbing wall. The statistical distribution of the chain end-to-end distance and its orientational angles are calculated within our monomer-resolved computer simulations. Over a wide range of shear rates, this distribution can be mapped onto a simple theoretical finite-extensible-nonlinearelastic dumbbell model with fitted anisotropic effective spring constants. The tails of the angular distribution functions are consistent with scaling predictions borrowed from the bulk dumbbell model. Finally, the frequency of the characteristic periodic tumbling motion has been investigated by simulation as well and was found to be sublinear with the shear rate for the three set-ups, which extends earlier results done in experiments and simulations for free and tethered polymer molecules without adsorption.

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“…Some drops of an aqueous electrolyte containing ZnCl 2 and NH 4 Cl and glass beads, used as spacer, were placed onto the cloth. Subsequently, the device was sealed under vacuum using a second PET substrate and UV-curable glue.…”

Section: Methodsmentioning

confidence: 99%

Self-powered electrochromic display as an example for integrated modules in printed electronics applications

Möller

Leyland

Copeland

et al. 2010

Eur. Phys. J. Appl. Phys.

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Short titleSelf-powered display for printed electronics AbstractThe growing market for flexible electronics devices is asking for reduction of manufacturing process complexity. One way to reduce complexity is to decrease the number of single components of a device by using integrated modules, i.e. device components providing multiple functions. In this article, the concept of a self-powered electrochromic graphics display device is demonstrated. The device is based on a three electrode system comprising an electrochromic electrode, a battery anode and a battery cathode, all in contact with a common electrolyte. The electrochromic electrode can be charged and discharged directly when connected to either the anode or cathode. Such a self-powered display integrates the functions of both a display and a battery. As part of a flexible electronics device, a self-powered display would be able to power other components, such as driver electronics.

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Fully printed integrated circuits from solution processable polymers

Cited by 114 publications

References 15 publications

Organic Complementary Inverter Circuits Fabricated with Reverse Offset Printing

Organic Complementary Inverter Circuits Fabricated with Reverse Offset Printing

Statistics of polymer adsorption under shear flow

Self-powered electrochromic display as an example for integrated modules in printed electronics applications

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