Inkjet printing of multiple layers for large-scale, cadmium-free electroluminescent quantum dot light-emitting diodes

2020 ◽  
Author(s):  
Tobias Hübner ◽  
Christoph J. Brabec ◽  
Britta Göötz ◽  
Norwin von Malm
Keyword(s):  
Quantum Dot ◽  
Inkjet Printing ◽  
Large Scale ◽  
Light Emitting Diodes ◽  
Light Emitting

Enhanced Performance of Pixelated Quantum Dot Light‐Emitting Diodes by Inkjet Printing of Quantum Dot–Polymer Composites

2021 ◽  
pp. 2002129
Author(s):  
Heebum Roh ◽  
Donghyun Ko ◽  
Dong Yeol Shin ◽  
Jun Hyuk Chang ◽  
Donghyo Hahm ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Polymer Composites ◽  
Inkjet Printing ◽  
Light Emitting Diodes ◽  
Light Emitting

Efficient All-Solution Processed Quantum Dot Light Emitting Diodes Based on Inkjet Printing Technique

2017 ◽  
Vol 9 (30) ◽  
pp. 25506-25512 ◽  
Author(s):  
Yang Liu ◽  
Fushan Li ◽  
Zhongwei Xu ◽  
Congxiu Zheng ◽  
Tailiang Guo ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Inkjet Printing ◽  
Light Emitting Diodes ◽  
Solution Processed ◽  
Light Emitting ◽  
Printing Technique

scholarly journals Copper Indium Disulfide Quantum Dot Light Emitting Diodes for Display and Lighting Technologies

2019 ◽  
Vol 20 (3) ◽  
Author(s):  
Stefano Barba
Keyword(s):  
Reaction Time ◽  
Quantum Dot ◽  
Large Scale ◽  
Light Emitting Diodes ◽  
Device Fabrication ◽  
Device Structure ◽  
Light Emitting ◽  
High Performing ◽  
Copper Indium Disulfide ◽  
Copper Indium

While significant advances in the development of quantum dot light emitting diodes (QLEDs) have been reported, these devices are primarily based on cadmium chalcogenide quantum dot (QD) materials. Both environmental and health concerns arise due to the toxicity of cadmium and consequently, alternative less toxic QDs must be developed for large scale QLED applications such as display and solid state lighting technologies.  In this work, copper indium disulfide (CIS) was investigated as an alternative QD material for QLED applications. Through experimentation with material synthesis and device fabrication, this project aimed to develop high performing CIS QLEDs. Several synthetic approaches were experimented with and it was determined that the injection of shorter chain 1-octanethoil as sulfur precursor with extensive shell reaction time resulted in highly luminescent QDs.  Single color QLEDs were fabricated based on typical device structure, using highly luminescent synthesized CIS QDs as the emissive layer in multilayer devices. Varying the shell reaction time of QDs in order to vary shell thickness resulted in significant differences in device performance. Using thicker shell QDs, high performing devices were obtained with the best performing QLEDs displaying a high peak current efficiency of 14.7 cd/A and high external quantum efficiency of 5.2%.

scholarly journals Optimization of Quantum Dot Thin Films using Electrohydrodynamic Jet Spraying for Solution-Processed Quantum Dot Light-Emitting Diodes

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Tuan Canh Nguyen ◽  
Thi Thu Thuy Can ◽  
Woon-Seop Choi
Keyword(s):  
Quantum Dot ◽  
High Performance ◽  
Large Scale ◽  
Light Emitting Diodes ◽  
Good Method ◽  
Large Area ◽  
Solution Processed ◽  
Light Emitting ◽  
Line Method ◽  
Straight Line

Abstract The electrohydrodynamic (EHD) jet spraying process is a good method for making quantum dot (QD) layers in light-emitting diodes (LEDs). However, controlling the morphology and large-scale fabrication of the QD layers are critical for realizing all-solution-processed QD-LEDs with high performance. Three spraying techniques were used with the EHD jet spraying technique: a big circular film method, a spiral-line method, and a straight-line method. These techniques were used to obtain QD films with good uniformity. The straight-line spray showed the most promise to obtain a uniform QD layer with large area, and QD-LEDs made with this method showed better performance with a low turn-on voltage of 3.0 V, a luminance of 7801 cd/m2, and a maximum current efficiency of 2.93 cd/A.

65‐2: High Luminescent Red Quantum Dot Light‐Emitting Diodes by Inkjet Printing

2020 ◽  
Vol 51 (1) ◽  
pp. 964-967
Author(s):  
Siqi Jia ◽  
Pai Liu ◽  
Haodong Tang ◽  
Jingrui Ma ◽  
Bing Xu ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Inkjet Printing ◽  
Light Emitting Diodes ◽  
Light Emitting

Mechanisms of operation in quantum-dot light-emitting diodes

2019 ◽  
pp. 947
Author(s):  
Shoichi sano ◽  
Takashi Nagase ◽  
Takashi Kobayashi ◽  
Hiroyoshi Naito
Keyword(s):  
Quantum Dot ◽  
Light Emitting Diodes ◽  
Light Emitting
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