Inkjet Printed RGB Quantum Dot-Hybrid LED

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

doi:10.1109/jdt.2009.2039019

Cited by 123 publications

(95 citation statements)

References 9 publications

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“…There are two major approaches to patterning and integrating differently colored QDs with high resolutions onto the display paneltransfer printing 100 and inkjet printing. 101 Since the as-synthesized colloidal QDs are dispersed in a solution phase, the spin-casting process was typically used in the early QLED studies, which led to monochromatic light-emitting devices. Later, a structured elastomeric stamp (usually a poly (dimethylsiloxane) (PDMS) stamp) was used to make pixelated QD patterns.…”

Section: Patterning Technology Of Qds For Full-color Displaysmentioning

confidence: 99%

Flexible quantum dot light-emitting diodes for next-generation displays

et al. 2018

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In the future electronics, all device components will be connected wirelessly to displays that serve as information input and/or output ports. There is a growing demand of flexible and wearable displays, therefore, for information input/output of the nextgeneration consumer electronics. Among many kinds of light-emitting devices for these next-generation displays, quantum dot light-emitting diodes (QLEDs) exhibit unique advantages, such as wide color gamut, high color purity, high brightness with low turn-on voltage, and ultrathin form factor. Here, we review the recent progress on flexible QLEDs for the next-generation displays. First, the recent technological advances in device structure engineering, quantum-dot synthesis, and high-resolution full-color patterning are summarized. Then, the various device applications based on cutting-edge quantum dot technologies are described, including flexible white QLEDs, wearable QLEDs, and flexible transparent QLEDs. Finally, we showcase the integration of flexible QLEDs with wearable sensors, micro-controllers, and wireless communication units for the next-generation wearable electronics.

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Section: Patterning Technology Of Qds For Full-color Displaysmentioning

confidence: 99%

Flexible quantum dot light-emitting diodes for next-generation displays

et al. 2018

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“…55 Next, the most critical component is optimizing the printing of the semiconducting CdSe/ZnS QD emissive layer. 3D printing may have an advantage in this regard, as spin coating 41 of QDs wastes 94-97% of the starting solution, 56 which is associated with a 20-fold increase in QD material cost. 57 Yet, uniform printing of the QDs must be achieved for reliable device behavior.…”

Section: Manuscript Textmentioning

confidence: 99%

“…We emphasize that all QD-LED layers and components were 3D printed in these devices, in contrast to other efforts in which only the QD layer was printed. 56,[65][66][67][68] To demonstrate the color tunability of the QD-LED emission, we printed green 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 QD-LEDs. 67 Green QD-LEDs deposited via transfer printing 66 and spin-coating 41 have been shown to have achieved 2,300 cd/m 2 , and 24,000 cd/m 2 at 5 V, respectively.…”

Section: Manuscript Textmentioning

confidence: 99%

3D Printed Quantum Dot Light-Emitting Diodes

et al. 2014

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Developing the ability to 3D print various classes of materials possessing distinct properties could enable the freeform generation of active electronics in unique functional, interwoven architectures. Achieving seamless integration of diverse materials with 3D printing is a significant challenge that requires overcoming discrepancies in material properties in addition to ensuring that all the materials are compatible with the 3D printing process. To date, 3D printing has been limited to specific plastics, passive conductors, and a few biological materials. Here, we show that diverse classes of materials can be 3D printed and fully integrated into device components with active properties. Specifically, we demonstrate the seamless interweaving of five different materials, including (1) emissive semiconducting inorganic nanoparticles, (2) an elastomeric matrix, (3) organic polymers as charge transport layers, (4) solid and liquid metal leads, and (5) a UV-adhesive transparent substrate layer. As a proof of concept for demonstrating the integrated functionality of these materials, we 3D printed quantum dot-based light-emitting diodes (QD-LEDs) that exhibit pure and tunable color emission properties. By further incorporating the 3D scanning of surface topologies, we demonstrate the ability to conformally print devices onto curvilinear surfaces, such as contact lenses. Finally, we show that novel architectures that are not easily accessed using standard microfabrication techniques can be constructed, by 3D printing a 2 × 2 × 2 cube of encapsulated LEDs, in which every component of the cube and electronics are 3D printed. Overall, these results suggest that 3D printing is more versatile than has been demonstrated to date and is capable of integrating many distinct classes of materials.

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“…Ink-jet printing is another attractive technique for QD-LED fabrication because of its simplicity, costeffectiveness, and high production speed. This technique was employed by Haverinen et al in QD displays [93] to define a 640 × 480 pixels geometry using standard photolithography techniques. Each pixel acquired an area of 19,600 µm 2 with a pixel separation of 80 µm.…”

Section: Electroluminescent Displays Of Colloidal Materialsmentioning

confidence: 99%

“…After the work of Zhang et al [93], the use of the QDs as gain media based on two-photon and three-photon absorption continued to be an important topic of attraction. For example, Guzelturk et al [110] CdZnS/CdS core/gradient shell QDs so that Auger recombination could be weakened.…”

Section: Lasers Of Colloidal Materialsmentioning

confidence: 99%

Colloidal nanocrystals for quality lighting and displays: milestones and recent developments

Erdem

Demir

2016

Nanophotonics

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Recent advances in colloidal synthesis of nanocrystals have enabled high-quality high-efficiency light-emitting diodes, displays with significantly broader color gamut, and optically-pumped lasers spanning the whole visible regime. Here we review these colloidal platforms covering the milestone studies together with recent developments. In the review, we focus on the devices made of colloidal quantum dots (nanocrystals), colloidal quantum rods (nanorods), and colloidal quantum wells (nanoplatelets) as well as those of solution processed perovskites and phosphor nanocrystals. The review starts with an introduction to colloidal nanocrystal photonics emphasizing the importance of colloidal materials for light-emitting devices. Subsequently, we continue with the summary of important reports on light-emitting diodes, in which colloids are used as the color converters and then as the emissive layers in electroluminescent devices. Also, we review the developments in color enrichment and electroluminescent displays. Next, we present a summary of important reports on the lasing of colloidal semiconductors. Finally, we summarize and conclude the review presenting a future outlook.

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Inkjet Printed RGB Quantum Dot-Hybrid LED

Cited by 123 publications

References 9 publications

Flexible quantum dot light-emitting diodes for next-generation displays

Flexible quantum dot light-emitting diodes for next-generation displays

3D Printed Quantum Dot Light-Emitting Diodes

Colloidal nanocrystals for quality lighting and displays: milestones and recent developments

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