The Standardization of Printable Materials and Direct Writing Systems

2013 ◽  
Vol 135 (1) ◽  
Author(s):  
Jessica Hoffman ◽  
Seyeon Hwang ◽  
Ada Ortega ◽  
Nam-Soo Kim ◽  
Kyoung-sik Moon
Keyword(s):  
Flexible Electronics ◽  
Radio Frequency Identification ◽  
Light Emitting Diodes ◽  
Printed Electronics ◽  
Cost Effective ◽  
Materials Testing ◽  
Direct Writing ◽  
Writing Systems ◽  
Light Emitting ◽  
Identification Tags

Direct-writing systems will be leading the future of additive manufacturing in that they have simple and cost-effective processes. There are various types of direct-writing systems, such as the roll-to-roll (R2R), microdispensing deposition write (MDDW), maskless mesoscale materials deposition (M3D), and ink-jet systems. These technologies are being used for the production of radio frequency identification tags (RFIDs), organic light-emitting diodes (OLEDs), light-emitting diodes (LEDs), flexible electronics, solar cells, antennas, etc. Recently, the standardization of printing materials and equipment has become a key issue in the printed electronics industry. The standardization of printed electronics can be categorized into four parts: equipment, materials, testing methods, and the education of this technology.

Implementation of Flexible Displays for Smart Textiles Using Processes of Printed Electronics

2019 ◽  
Vol 2019 (NOR) ◽  
pp. 000021-000028
Author(s):  
Artem Ivanov
Keyword(s):  
Comparative Analysis ◽  
Field Test ◽  
Light Emitting Diodes ◽  
Printed Electronics ◽  
Comparative Investigation ◽  
Manufacturing Processes ◽  
Smart Textiles ◽  
Flexible Displays ◽  
Light Emitting ◽  
Driver Electronics

Abstract Utilisation of light emitting diodes (LEDs) and printed electroluminescent elements for manufacturing of flexible displays to be integrated in textile items was analysed. The comparative investigation focused on the necessary manufacturing processes, on the architecture of driver electronics, on achievable display brightness, on lifetime expectations and reliability aspects of the systems. Printed electroluminescent display demonstrators were manufactured and integrated in jackets for the currently running field test. Description of the produced systems as well as the results of the comparative analysis are presented.

Cost-Effective Light-Mixing Module for Solar-Lighting System Appended With Auxiliary RGBW Light-Emitting Diodes

2017 ◽  
Vol 139 (6) ◽  
Author(s):  
An Chi Wei ◽  
Shih Chieh Lo ◽  
Ju-Yi Lee ◽  
Hong-Yih Yeh
Keyword(s):  
Light Source ◽  
Light Emitting Diodes ◽  
Cylindrical Tube ◽  
Cost Effective ◽  
Lighting System ◽  
Optical Efficiency ◽  
Light Emitting ◽  
Solar Lighting ◽  
Lighting Systems ◽  
Main Components

A light-mixing module consisting of a compound parabolic concentrator (CPC) and a light-mixing tube is proposed herein to realize a uniform and efficient solar-lighting system. In this lighting system, the sunlight collected into a fiber and then guided to an indoor destination is the principal light source, while an auxiliary light source including multiple red, green, blue, and white (RGBW) light-emitting diodes (LEDs) is controlled by an auto-compensating module. To mix the principal and the auxiliary sources and to realize the uniform illumination, the light-mixing tube was coated with BaSO4 and optimized as a cylindrical tube. The design of the light-mixing tube is described and discussed in this article. According to the simulated results, the uniformity and the optical efficiency of the designed light-mixing tube are 82.9% and 85.7%, respectively, while from the experimental results, the uniformity of 85.9% and the optical efficiency of 83.3% have been obtained. In terms of the common indoor-lighting standards and the specifications of commercial components used in lighting systems, the proposed light-mixing module has demonstrated the high uniformity and acceptable optical efficiency. Additionally, since the main components of the light-mixing module can be designed as plastic optics, a cost-effective light-mixing module and a profitable lighting system can be realized. Thus, the performance and the price of the proposed light-mixing module fit the demands of the illumination market, while the proposed system shows the potential for indoor solar-lighting applications.

Development of a cost effective surface-patterned transparent conductive coating as top-contact of light emitting diodes

2014 ◽  
Vol 115 (19) ◽  
pp. 193108 ◽  
Author(s):  
Arpita Haldar ◽  
Susanta Bera ◽  
Sunirmal Jana ◽  
Kallol Bhattacharya ◽  
Rajib Chakraborty
Keyword(s):  
Light Emitting Diodes ◽  
Cost Effective ◽  
Effective Surface ◽  
Light Emitting ◽  
Conductive Coating ◽  
Top Contact

scholarly journals Efficient white polymer light-emitting diodes (WPLEDs) based on covalent-grafting of [Zn2(MP)3(OAc)] into PVK

2020 ◽  
Vol 11 (10) ◽  
pp. 2640-2646 ◽  
Author(s):  
Guorui Fu ◽  
Yani He ◽  
Wentao Li ◽  
Tiezheng Miao ◽  
Xingqiang Lü ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Cost Effective ◽  
Large Area ◽  
Light Emitting ◽  
Grafted Polymer ◽  
Covalent Grafting ◽  
Polymer Light Emitting Diodes

Using [Zn2(MP)3(OAc)]-grafted polymer as a single emitting layer, record-high efficiencies and weak (ca. 25%) efficiency roll-off are realized for cost-effective and large-area flexible WPLEDs.

Thermally activated delayed fluorescence of co-deposited copper(i) complexes: cost-effective emitters for highly efficient organic light-emitting diodes

2017 ◽  
Vol 5 (28) ◽  
pp. 6982-6988 ◽  
Author(s):  
Zixing Wang ◽  
Jun Zhu ◽  
Zhiwei Liu ◽  
Peng Wu ◽  
Hedan Wang ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Cost Effective ◽  
Delayed Fluorescence ◽  
Organic Light Emitting Diodes ◽  
Copper Iodide ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Thermally Activated ◽  
Highly Efficient ◽  
Organic Light

TADF copper(i) complexes were made by co-depositing carboline derivatives and copper iodide. δ-Carboline derivative-based OLEDs showed 6 times higher efficiency than α-carboline derivative-based ones.

Metal oxides as functional semiconductors. An inkjet approach

2013 ◽  
Vol 1552 ◽  
pp. 45-50
Author(s):  
Anna Vilà ◽  
Alberto Gomez ◽  
Luis Portilla ◽  
Marti Cirici ◽  
Juan Ramon Morante
Keyword(s):  
Flexible Electronics ◽  
Inkjet Printing ◽  
Sol Gel ◽  
Cost Effective ◽  
Thin Layers ◽  
Thermal Treatments ◽  
Direct Writing ◽  
Large Area ◽  
Cost Effective Technique

ABSTRACTInkjet printing provides an interesting technology for electronic devices, as it is a versatile minimum-waste cost-effective technique for direct writing on almost every surface without need of masks or sacrificial layers. Among the fields in which it has been tested, transparent and flexible electronics offer a variety of applications ranging from large-area roll-toroll (such as OLEDs for lighting or solar cells) to small low-consumption biocompatible devices such as biosensors.This work aims to present some advances in the field of semiconductors synthesized by sol-gel and patterned by inkjet printing. Chemical routes are used to obtain suitable inks, based on salts of Ga, In, Zn, Cu and Sn and solvents as methoxyethanol. Inkjet printing provides thin layers 20-300nm thick, with morphology strongly depending on the materials. Different thermal treatments are tested, and some chemical and optical characterization of the obtained layers allows optimizing the technology for each material.The effectiveness of the inks and the technique is demonstrated by the electronic behavior of thin-film transistors fabricated by the proposed technology. The different devices are compared, suggesting the properties of the different materials analyzed, as a step ahead in the development of a complete logic for such promising applications of the flexible electronics.

Sign in / Sign up

Export Citation Format

Share Document