In the University of Illinois, a team of scientists who belong to to materials science and engineering analysis departments along-side researchers from Erciyes University in Turkey have authored a paper known as High-Resolution Patterns of Quantum Dots square shaped by Electrohydrodynamic Jet Printing for LEDs. The paper was printed in the ACS journal.
They describe that the materials and operational conditions that yield high-resolution printing of layers of quantum dots with precise management over thickness and submicron lateral resolution and capabilities, to be used as active layers of QD light-emitting diodes.
Patterning Quantum Dots with precise management of the thicknesses and nano-scale lateral dimensions, represent crucial capabilities for advanced applications. The thickness will be controlled through a mixture of printing parameters as well as the scale of the nozzle, the overall speed of the stage, ink mixture and voltage.

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Their work on high-resolution patterns of quantum dots is of interest because it shows that advanced techniques in e-jet printing provide robust capabilities in patterning quantum dot materials from inks, that too over massive areas.
E-jet printing normally refers to a way known as electrohydrodynamic jet, represented as a nano-manufacturing method that uses an electrical field to induce fluid jet printing through micro or even nano-scale nozzles.
This kind of printer works by pushing ink droplets out of the nozzle,thereby creating smaller droplets. An electrical field at the nozzle gap causes ions to be created on the cartilage of the ink driblet.
According to the report, dots, lines, squares, and complicated pictures of Quantum Dot patterns square measure doable, with tunable dimensions and thickness. These arrays in addition as those created with multiple completely different Quantum Dots composition structure, directly patterned or simply stacked by e-jet printing, can be utilised as photoluminescent and electroluminescent layers.


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