共查询到17条相似文献,搜索用时 140 毫秒
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喷墨打印具有成本低、定位精度高、可实现全彩色化等优点,被业界认为是实现聚合物电致发光器件(PLED)量产的重要技术之一。本文介绍了喷墨打印技术在PLED制备中的应用现状和研究进展,探讨了聚合物发光材料溶液喷墨打印流变性、薄膜均匀性等基础性问题。 相似文献
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喷墨印刷技术是一种非接触式、工艺简单、无版数字化的印刷技术,越来越多的研究者将该技术应用到制备电化学生物传感器中,以应对电化学生物传感器因向数字化、智能化等方向发展而对其制备技术提出的更高要求。因此,在对喷墨打印技术制备电化学生物传感器原理与优劣进行分析的基础上,依据其发展历程对近年来的研究进行了总结与分析,探讨了其在制作过程中存在的主要问题,即对油墨的要求较高。寻找合适的方法解决喷墨打印金属电极的电导率问题,研究导电聚合物的浓度、层数等对成膜质量和传感器响应程度的影响及利用喷墨打印技术制备整个传感器的研究将是今后本领域的研究重点。 相似文献
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石墨烯因其优异的特性,被广泛用于制备聚合物基复合材料,而3D打印作为一种新兴的成型加工方式,正越来越多地应用到石墨烯/聚合物基复合材料的成型制造当中。本文介绍石墨烯/聚合物基复合材料的溶液混合、熔融混合以及原位聚合三种主要制备方式,重点论述喷墨打印成型、熔融沉积成型、立体光固化成型、选择性激光烧结等目前国内外用于石墨烯/聚合物基复合材料成型的3D打印方式及其各自的优势和劣势,以及3D打印成型的石墨烯/聚合物基复合材料制件在电子、能源、生物医学和航空航天等领域的应用,最后指出可打印性好、石墨烯分散均匀、功能特性优异的石墨烯/聚合物基复合材料的研制将会是未来该方向的研究重点。 相似文献
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B.‐J. deGans P.C. Duineveld U.S. Schubert 《Advanced materials (Deerfield Beach, Fla.)》2004,16(3):203-213
Inkjet printing is considered to be a key technology in the field of defined polymer deposition. This article provides an introduction to inkjet printing technology and a short overview of the available instrumentation. Examples of polymer inkjet printing are given, including the manufacturing of multicolor polymer light‐emitting diode displays, polymer electronics, three‐dimensional printing, and oral dosage forms for controlled drug release. Special emphasis is placed upon the utilized polymers and conditions, such as polymer structure, molar mass, solvents, and concentration. Studies on viscoelastic fluid jets and the formation of viscoelastic droplets under gravity indicate that strain hardening is the key parameter that determines the inkjet printability of polymer solutions. 相似文献
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Carbon nanotube (CNTs) inks may provide an effective route for producing flexible electronic devices by digital printing. In this paper we report on the formulation of highly concentrated aqueous CNT inks and demonstrate the fabrication of flexible electroluminescent (EL) devices by inkjet printing combined with wet coating. We also report, for the first time, on the formation of flexible EL devices in which all the electrodes are formed by inkjet printing of low-cost multi-walled carbon nanotubes (MWCNTs). Several flexible EL devices were fabricated by using different materials for the production of back and counter electrodes: ITO/MWCNT and MWCNT/MWCNT. Transparent electrodes were obtained either by coating a thin layer of the CNTs or by inkjet printing a grid which is composed of empty cells surrounded by MWCNTs. It was found that the conductivity and transparency of the electrodes are mainly controlled by the MWCNT film thickness, and that the dominant factor in the luminance intensity is the transparency of the electrode. 相似文献
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Liming Xie Xueying Xiong Qiaowen Chang Xiaolian Chen Changting Wei Xia Li Meng Zhang Wenming Su Zheng Cui 《Small (Weinheim an der Bergstrasse, Germany)》2019,15(16)
Quantum dots light‐emitting diodes (QLEDs) have attracted much interest owing to their compatibility with low‐cost inkjet printing technology and potential for use in large‐area full‐color pixelated display. However, it is challenging to fabricate high efficiency inkjet‐printed QLEDs because of the coffee ring effects and inferior resistance to solvents from the underlying polymer film during the inkjet printing process. In this study, a novel crosslinkable hole transport material, 4,4′‐bis(3‐vinyl‐9H‐carbazol‐9‐yl)‐1,1′‐biphenyl (CBP‐V) which is small‐molecule based, is synthesized and investigated for inkjet printing of QLEDs. The resulting CBP‐V film after thermal curing exhibits excellent solvent resistance properties without any initiators. An added advantage is that the crosslinked CBP‐V film has a sufficiently low highest occupied molecular orbital energy level (≈?6.2 eV), high film compactness, and high hole mobility, which can thus promote the hole injection into quantum dots (QDs) and improve the charge carrier balance within the QD emitting layers. A red QLED is successfully fabricated by inkjet printing a CBP‐V and QDs bilayer. Maximum external quantum efficiency of 11.6% is achieved, which is 92% of a reference spin‐coated QLED (12.6%). This is the first report of such high‐efficiency inkjet‐printed multilayer QLEDs and demonstrates a unique and effective approach to inkjet printing fabrication of high‐performance QLEDs. 相似文献
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The manufacture of high-performance electronic devices with micrometre or even submicrometre dimensions by solution processing and direct printing, requires the ability to control accurately the flow and spread of functional liquid inks on surfaces. This can be achieved with the help of surface-energy patterns causing inks to be repelled and dewetted from pre-defined regions of the substrate. To exploit this principle for the fabrication of submicrometre device structures, a detailed understanding of the factors causing ink droplets to dewet on patterned surfaces is required. Here, we use hydrophobic surface-energy barriers of different geometries to study the influence of solution viscosity, ink volume, and contact angle on the process of dewetting of inkjet-printed droplets of a water-based conducting polymer. We demonstrate polymer field-effect transistor devices with channel length of 500 nm fabricated by surface-energy-assisted inkjet printing. 相似文献
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Guodong Wang Muhammad Abdullah Adil Jianqi Zhang Zhixiang Wei 《Advanced materials (Deerfield Beach, Fla.)》2019,31(45)
The printing of large‐area organic solar cells (OSCs) has become a frontier for organic electronics and is also regarded as a critical step in their industrial applications. With the rapid progress in the field of OSCs, the highest power conversion efficiency (PCE) for small‐area devices is approaching 15%, whereas the PCE for large‐area devices has also surpassed 10% in a single cell with an area of ≈1 cm2. Here, the progress of this fast developing area is reviewed, mainly focusing on: 1) material requirements (materials that are able to form efficient thick active layer films for large‐area printing); 2) modular designs (effective designs that can suppress electrical, geometric, optical, and additional losses, leading to a reduction in the PCE of the devices, as a consequence of substrate area expansion); and 3) printing methods (various scalable fabrication techniques that are employed for large‐area fabrication, including knife coating, slot‐die coating, screen printing, inkjet printing, gravure printing, flexographic printing, pad printing, and brush coating). By combining thick‐film material systems with efficient modular designs exhibiting low‐efficiency losses and employing the right printing methods, the fabrication of large‐area OSCs will be successfully realized in the near future. 相似文献
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A series of inkjet printing processes have been studied using graphene-based inks. Under optimized conditions, using water-soluble
single-layered graphene oxide (GO) and few-layered graphene oxide (FGO), various high image quality patterns could be printed
on diverse flexible substrates, including paper, poly(ethylene terephthalate) (PET) and polyimide (PI), with a simple and
low-cost inkjet printing technique. The graphene-based patterns printed on plastic substrates demonstrated a high electrical
conductivity after thermal reduction, and more importantly, they retained the same conductivity over severe bending cycles.
Accordingly, flexible electric circuits and a hydrogen peroxide chemical sensor were fabricated and showed excellent performances,
demonstrating the applications of this simple and practical inkjet printing technique using graphene inks. The results show
that graphene materials-which can be easily produced on a large scale and possess outstanding electronic properties-have great
potential for the convenient fabrication of flexible and low-cost graphene-based electronic devices, by using a simple inkjet
printing technique.
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Morten Mikolajek Timo Reinheimer Markus Muth Paul Hohwieler Michael J. Hoffmann Joachim R. Binder 《Advanced Engineering Materials》2018,20(9)