High‐Resolution Inkjet Printing of Quantum Dot Light‐Emitting Microdiode Arrays

Yang, Peihua; Zhang, Long; Kang, Dong Jin; Strahl, Robert; Kraus, Tobias

doi:10.1002/adom.201901429

Cited by 158 publications

(121 citation statements)

References 57 publications

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“…[ 13 ] Alternately, inkjet printing is a versatility technology and compatible with large‐scale digital printing of customized patterns, which also has the potential advantage of reduction in material waste. [ 14–19 ] It is in principle a suitable technology for printing thin films for the above mentioned electrochemical devices with more features such as flexibility and high integration. However, the inkjet printing technology needs further amelioration to overcome some obstacles, such as nozzle clogging issues and development of stable inks to print devices effectively.…”

Section: Figurementioning

confidence: 99%

Flexible Pseudocapacitive Electrochromics via Inkjet Printing of Additive‐Free Tungsten Oxide Nanocrystal Ink

Zhang

Chao

Yang

et al. 2020

Advanced Energy Materials

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Direct inkjet printing of functional inks is an emerging and promising technique for the fabrication of electrochemical energy storage devices. Electrochromic energy devices combine electrochromic and energy storage functions, providing a rising and burgeoning technology for next‐generation intelligent power sources. However, printing such devices has, in the past, required additives or other second phase materials in order to create inks with suitable rheological properties, which can lower printed device performance. Here, tungsten oxide nanocrystal inks are formulated without any additives for the printing of high‐quality tungsten oxide thin films. This allows the assembly of novel electrochromic pseudocapacitive zinc‐ion devices, which exhibit a relatively high capacity (≈260 C g−1 at 1 A g−1) with good cycling stability, a high coloration efficiency, and fast switching response. These results validate the promising features of inkjet‐printed electrochromic zinc‐ion energy storage devices in a wide range of applications in flexible electronic devices, energy‐saving buildings, and intelligent systems.

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Section: Figurementioning

confidence: 99%

Flexible Pseudocapacitive Electrochromics via Inkjet Printing of Additive‐Free Tungsten Oxide Nanocrystal Ink

Zhang

Chao

Yang

et al. 2020

Advanced Energy Materials

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“…The coffee ring effect is a crucial parameter to consider fabricating high resolution and uniform patterns. By manipulating the fraction of octane in the ink, the capillary flow and the inward Marangoni flow are balanced, which results in constant thickness across droplets [167]. In EHD printing, reducing nozzle size or novel designs of tips were reported to enhance printing quality [114,124].…”

Section: High-resolution Patterningmentioning

confidence: 99%

“…A low surface energy coating [163] Make pre-patterned structure on substrate (inkjet) [165,166] Reverse coffee-ring effect (inkjet) [97,167,168] Reduce nozzle size (EHD) [114,124] Introduce tip-assisted nozzle (EHD) [124] Manipulate focus ratio(aerosol) [131] Finer screen mask (screen printing) [70] Small engraved cells (gravure) [11,141] Make wettability contrast between cell and land(gravure) [147] Uniformity Uniform ink deposition is required to increase the electrical stability and reliability of the electronics.…”

Section: Remarks Strategies Referencesmentioning

confidence: 99%

Advanced Nanomaterials, Printing Processes, and Applications for Flexible Hybrid Electronics

Park

Kim

et al. 2020

Materials

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Recent advances in nanomaterial preparation and printing technologies provide unique opportunities to develop flexible hybrid electronics (FHE) for various healthcare applications. Unlike the costly, multi-step, and error-prone cleanroom-based nano-microfabrication, the printing of nanomaterials offers advantages, including cost-effectiveness, high-throughput, reliability, and scalability. Here, this review summarizes the most up-to-date nanomaterials, methods of nanomaterial printing, and system integrations to fabricate advanced FHE in wearable and implantable applications. Detailed strategies to enhance the resolution, uniformity, flexibility, and durability of nanomaterial printing are summarized. We discuss the sensitivity, functionality, and performance of recently reported printed electronics with application areas in wearable sensors, prosthetics, and health monitoring implantable systems. Collectively, the main contribution of this paper is in the summary of the essential requirements of material properties, mechanisms for printed sensors, and electronics.

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“…[903] The lithography-based scaling capability has enabled the large-scale integration of silicon-based transistors into ICs for ubiquitous applications in our daily life. [919][920][921] Although printing techniques such as aerosol jet printing and inkjet printing have achieved significant progress in improving the printing resolution, [150,922] the printed structures still cannot reach the scale as small as those achievable with lithography techniques. The relatively low resolution (typically 10-100 μm) and large feature size (typically 100-200 μm) of the state-of-the-art AM printing techniques have limited the progress of all printed ICs.…”

Section: Logic Gates and Icsmentioning

confidence: 99%

Ink‐Based Additive Nanomanufacturing of Functional Materials for Human‐Integrated Smart Wearables

2020

Advanced Intelligent Systems

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Human-integrated devices include wearable and implantable devices for monitoring vital human signals or interacting with the human body. [1-3] The human-integrated devices needed to be tethered to the organs or the human skin for implementing their functions such as sensing and energy harvesting. [4-18] The economical, agile, customizable manufacturing, and integration of multifunctional device modules into networked systems with mechanical compliance and robustness will enable unprecedented human-integrated smart wearables [19-23] and usher in exciting opportunities in emerging technologies such as electronics, [24-29] wearable computation, [30-36] human-machine interface, [37-42] robotics, [43-48] and advanced healthcare. [49-54] The fabrication of stateof-the-art microelectronics involves hightemperature processing steps, which are generally incompatible with the flexible substrates (e.g., paper, polymer, fiber, etc.) [55-61] widely used in the wearable devices. Moreover, the current microfabrication technologies are not well positioned to process the emerging functional nanomaterials (e.g., nanowires [NWs] and 2D materials). [62-65] Such incomparability severely limits the pace of deploying these emerging materials (despite their unprecedented properties) in wearable and flexible device technologies. The additive manufacturing (AM) processes have emerged as potential candidates for addressing the earlier limitations of the current microfabrication technologies in fabricating flexible/wearable printed devices with diversified functionalities, e.g., energy harvesting/storage, sensing, actuation, and computation, leveraging advantages such as maskless processing, versatile ink formulation, low cost, low processing temperature, and scalability. [66-71] Researchers have devoted tremendous efforts to develop the related technologies, and several reviews have provided excellent discussions on the material formulation and process aspects of AM techniques. [63,72-79] However, to our best knowledge, there are few review reports about the ink-based additive nanomanufacturing of functional materials for human-integrated smart wearables. To fill this gap, here we review the recent progress in ink-based

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High‐Resolution Inkjet Printing of Quantum Dot Light‐Emitting Microdiode Arrays

Cited by 158 publications

References 57 publications

Flexible Pseudocapacitive Electrochromics via Inkjet Printing of Additive‐Free Tungsten Oxide Nanocrystal Ink

Flexible Pseudocapacitive Electrochromics via Inkjet Printing of Additive‐Free Tungsten Oxide Nanocrystal Ink

Advanced Nanomaterials, Printing Processes, and Applications for Flexible Hybrid Electronics

Ink‐Based Additive Nanomanufacturing of Functional Materials for Human‐Integrated Smart Wearables

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