Inkjet printing of light emitting quantum dots

Haverinen, Hanna M.; Myllylä, Risto; Jabbour, Ghassan E.

doi:10.1063/1.3085771

Cited by 215 publications

(155 citation statements)

References 8 publications

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“…1,2 Among these properties, we can cite high molar absorptivity, 3,4 high uorescence quantum yield, 5,6 exceptional multiphoton absorption, [7][8][9][10][11] and strong electron-phonon coupling. 12,13 Because of these remarkable features, QDs are of great technological interest since they have been used in several applications, such as solar and photovoltaic cells, 14,15 luminescent biolabels, 16 inkjet printing light-emitting devices, 17 displays, 18 and RGB devices. 19,20 The production of high quality QDs with controllable physical and chemical properties is not trivial, and much effort has been devoted to develop useful synthetic approaches for producing high quality QDs.…”

Section: Introductionmentioning

confidence: 99%

Determination of particle size distribution of water-soluble CdTe quantum dots by optical spectroscopy

et al. 2014

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In the present study, we report the synthesis of glutathione (GSH) capped CdTe quantum dots (QDs) using the one-pot approach as well as their optical properties. These QDs were used as a probe for a detailed quantitative correlation between spectroscopic data and QDs size dispersion. We have developed a spectroscopic method to determine the size dispersion of QDs in solution based on the fluorescence spectroscopy and the fluorescence quantum yields. Our results demonstrate that the one-pot approach produces GSH-capped CdTe QDs of narrow size dispersion, as inferred by the sharp line width (full width at half maximum) of the fluorescence signal (from 153 meV to 163 meV), as revealed by our spectroscopy method. We observed that the GSH-capped CdTe QDs cause an increase in fluorescence quantum yield from 11% to 30% concomitantly with an increase in lifetime decay from 38 to 50 ns during the course of synthesis (from 15 min to 120 min), indicating an increase in the average size of the QDs. Finally, we have used the evolving factor analysis together with the multivariate curve resolutionalternating least squares method to corroborate our results, and we found a good agreement between both methods with the advantage that in our method, we were able to obtain size dispersion rather than just the mean QD size.

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Section: Introductionmentioning

confidence: 99%

Determination of particle size distribution of water-soluble CdTe quantum dots by optical spectroscopy

et al. 2014

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“…Inkjet printing has gradually become a versatile tool for accurately depositing very small quantities (tens of picoliters) of materials at defined positions on the surface of a wide variety of substrates. So far within scientific research, inkjet printing has been mostly applied to the manufacture of polymer light emitting diodes [29][30][31][32], deposition of conducting polymers [6,[33][34][35] and fluorescent nanoparticles [36] and fabrication of biosensors [37,38]. Inkjet printing offers advantages over other methods of deposition of thin films, such as patterning capability, reduction in waste products, high speed production, low cost fabrication, room temperature deposition, printing on large area and flexible substrates [6].…”

Section: Introductionmentioning

confidence: 99%

Inkjet printed LED based pH chemical sensor for gas sensing

O'Toole

Shepherd

Wallace

et al. 2009

Analytica Chimica Acta

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“…However, the need of industry-level 3D printers has attracted a lot of attention from researchers and scientists in the fields of biotechnology, automotive, architecture, electrical, electronic, photonic, optical, and sensor engineering. [6][7][8][9][10] Printers' resolution is dropping under 100 micrometers (250 dot per inch (DPI)) with a typical layer thickness of 100 micrometers. The primary advantage of a 3D printer is its ability to create any shape in the micrometer range up to several meter range depending on the supporting holder.…”

Section: D Printers Developed In the Early 1980smentioning

confidence: 99%

Advances in 2D/3D Printing of Functional Nanomaterials and Their Applications

Choi

Das

Theodore³

et al. 2015

ECS J. Solid State Sci. Technol.

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Advanced printing techniques include innovative and/or integrated processes that are used to produce an object with enhanced functionality and with a wide range of applications. This is done by realizing printing of functional materials such as ink, paste, polymer, ceramic powder, and organic materials. Unlike conventional manufacturing methods, a new technique is needed to manipulate small objects to fabricate desired parts, as materials are scaled down to the nanometer range. In this regard, the traditional subtractive production has been changed to a bottom-up approach as device structures have changed to multilayer structures which contain several functional nanomaterials. A powder is used to fabricate an object with a desired geometry. This reduces the material loss due to the bottom-up nature of the process. In this article, we review the current state of knowledge for advanced manufacturing using two methods, 3D printing and roll-to-roll manufacturing. 3D printers developed in the early 1980s1 has created a revolution in research and development and teaching laboratories due to a substantial price drop after 2010 and an easy software called plugplay that allows most people to use it without extensive technical help.2,3 Based on economic analysis, the market for 3D printers is growing significantly. This is driven by a number of sectors including aerospace, automotive, and medical/dental and the market was worth several billions in 2013. During the last decade, the business has increased exponentially due to the 3D printing technology enabling the fabrication of complex objects with enhanced functionalities and improved material properties.4,5 Desktop 3D printers were targeted primarily at hobbyists and consumers who are not in industry. However, the need of industry-level 3D printers has attracted a lot of attention from researchers and scientists in the fields of biotechnology, automotive, architecture, electrical, electronic, photonic, optical, and sensor engineering.6-10 Printers' resolution is dropping under 100 micrometers (250 dot per inch (DPI)) with a typical layer thickness of 100 micrometers. The primary advantage of a 3D printer is its ability to create any shape in the micrometer range up to several meter range depending on the supporting holder.Over the past few years a rapid growth in the 3D printing industry has been observed as evidenced by the enormous numbers of articles published in scientific journals and patents filed as illustrated in Figure 1. Advances in the 3D printing technology will also lead to significant price drop, owing to the fact that a lot of items will be manufactured depending only upon the type and need of the customer. 11This means that household-level production will be much preferred due to broader imagination and creativity of human being. Another implication is that the manufacturing process of any item can be highly customized because altering the items will not require tooling or intensive software development.12 These simplified production processes that were...

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Inkjet printing of light emitting quantum dots

Cited by 215 publications

References 8 publications

Determination of particle size distribution of water-soluble CdTe quantum dots by optical spectroscopy

Determination of particle size distribution of water-soluble CdTe quantum dots by optical spectroscopy

Inkjet printed LED based pH chemical sensor for gas sensing

Advances in 2D/3D Printing of Functional Nanomaterials and Their Applications

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