Electroluminescent light sources via soft lithography

Young, R; Evans, P.S.A.; Hay, Gareth I.; Southee, Darren; Harrison, David

doi:10.1108/03056120810896218

Cited by 4 publications

(4 citation statements)

References 3 publications

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“…Roll‐to‐roll methods are effective at processing large areas and high volumes and as such are an important area of current research; some examples are gravure, contact, stamp transfer, doctor blading, and flexographic printing [5–10]. Soft lithography processing has also been investigated [11, 12] and patterned polymeric anodes have successfully been created using a peel‐off soft lithography method [13]. Other developments in processing techniques include depositing different layer materials using different methods (a combination of both solution based and thermal deposition) [9, 10, 14, 15].…”

Section: Introductionmentioning

confidence: 99%

Injection molding electroluminescent components

Middleton

Goodship

2012

Polymer Engineering & Sci

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This article explores the feasibility of using mass manufacture, namely injection molding, as a route to produce cost effective electroluminescent (EL) components straight from the mold tool. EL screen printing pastes were adapted and introduced into the injection molding environment as a multilayer structure. Four‐layer systems were investigated using a spray deposition method to apply individual layer components directly in‐mold. Finally, the substrate was back injected to produce a three‐dimensional illuminating device straight from the mold tool. Materials, methods, and outcomes are described, the implication being that electronic manufacture could be moved upstream and performed in‐mold with resultant cost and energy savings. POLYM. ENG. SCI., 2013. © 2012 Society of Plastics Engineers

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Section: Introductionmentioning

confidence: 99%

Injection molding electroluminescent components

Middleton

Goodship

2012

Polymer Engineering & Sci

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“…Indeed, interesting properties carried by soft materials enable them to be better suited for various applications like microfluidics devices, large area deposition, or unusual material/shape patterning. − Soft materials can replicate features with nanometric size at low cost; they are widely compatible with other materials and with self-assembling process. Hence, this leads to high application potential such as model systems to study interfacial phenomena relevant to etching protection, − biological and chemical sensors, or molecular electronics. ,, …”

Section: Introductionmentioning

confidence: 99%

“…Hence, this leads to high application potential such as model systems to study interfacial phenomena relevant to etching protection, [6][7][8] biological and chemical sensors, 9 or molecular electronics. 1,10,11 As a consequence, dynamical properties involved in microcontact printing processes have attracted much interest and deserve to be fully understood. The use of solid ink enables the formation of patterns with lateral resolutions down to 50 nm.…”

Section: Introductionmentioning

confidence: 99%

Self-Assembled Film Organization in Fast Microcontact Printing Investigated by Sum Frequency Generation Spectroscopy

et al. 2009

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The ability of microcontact printing to build highly ordered alkanethiol self-assembled monolayers (SAMs) on Pt substrates within a short time is studied by sum frequency generation (SFG) spectroscopy and contact angle measurements. The deposition of ordered hexadecanethiol and dodecanethiol monolayers onto platinum substrates is achieved in less than 1 s. The film order and the alkane chain orientation are deduced from the SFG fingerprint acquired under different sets of laser polarization. Comparisons between the SAMs prepared by printing or by immersion demonstrate that both methods lead to the same high quality organization. Patterning effects within printed films are also investigated with respect to the layer conformation. Finally, wetting properties of printed layers are correlated with the printing duration, corroborating the spectroscopic results.

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“…The present study has shown that the flexographic printing process can be used to produce high surface area porous electrodes for use in viable supercapacitors and these might be used to power printed displays [6,7]; however, several challenges still remain. The first challenge is to achieve complete coverage of the silver layer, and the second is to improve the capacitance.…”

Section: Future Workmentioning

confidence: 99%

Printed electrodes for flexible, light-weight solid-state supercapacitors – a feasibility study

et al. 2015

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Purpose -It has been shown previously that offset lithography, a common printing technique, can be used to make electrodes for energy storage devices such as primary cells [1,2]. This paper reports on the feasibility of the manufacture of printed rechargeable power sources incorporating, in the first instance, electrode structures from the previous study, and moving on to improved electrode structures fabricated, via flexographic printing, using commercially available inks.Design/methodology/approach -A pair of the original Ag/C electrodes, printed via offset lithography, were sandwiched together with a PVA-KOH gel electrolyte and then sealed. The resultant structures were characterised using electrochemical techniques and the performance as supercapacitors assessed. Following these studies, electrode structures of the same dimensions, consisting of two layers, a silver based current collector covered with a high surface area carbon layer, were printed flexographically, using inks, on a melinex substrate. The characterisation and assessment of these structures, as supercapacitors, was determined.Findings -It was found that the supercapacitors constructed using the offset lithographic electrodes exhibited a capacitance of 0.72 mF/cm 2 and had an equivalent series resistance of 3.96 Ω. The structures fabricated via flexography exhibited a capacitance of 4 mF/cm 2 and had an equivalent series resistance of 1.25 Ω. The supercapacitor structures were subjected to bending and rolling tests to determine device performance under deformation and stress. It was found that supercapacitor performance was not significantly reduced by bending or rolling.Originality/value -This paper provides insight into the use of printed silver/carbon electrodes within supercapacitor structures and compares the performance of devices fabricated using inks for offset lithographic printing presses and those made using commercially available inks for flexographic printing. The potential viability of such structures for low-end and cheap energy storage devices is demonstrated.

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Electroluminescent light sources via soft lithography

Cited by 4 publications

References 3 publications

Injection molding electroluminescent components

Injection molding electroluminescent components

Self-Assembled Film Organization in Fast Microcontact Printing Investigated by Sum Frequency Generation Spectroscopy

Printed electrodes for flexible, light-weight solid-state supercapacitors – a feasibility study

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