Electrospray mechanism for quantum dot thin-film formation using an electrohydrodynamic jet and light-emitting device application

A novel electrohydrodynamic (EHD) electrospray coating mechanism was proposed for the continuous fabrication of large-area quantum dot (QD) thin films for high-performance light-emitting diodes (LEDs). The size of QD droplets was systemically controlled using the stable EHD electrospray mode from a...

Full description

Saved in:
Bibliographic Details
Published in:Scientific reports 2020-07, Vol.10 (1), p.11075-11075, Article 11075
Main Authors: Nguyen, Tuan Canh, Choi, Woon-Seop
Format: Article
Language:English
Subjects:
639/301
639/624
Fabrication
Humanities and Social Sciences
Light emitting diodes
multidisciplinary
Quantum dots
Science
Science (multidisciplinary)
Thin films
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A novel electrohydrodynamic (EHD) electrospray coating mechanism was proposed for the continuous fabrication of large-area quantum dot (QD) thin films for high-performance light-emitting diodes (LEDs). The size of QD droplets was systemically controlled using the stable EHD electrospray mode from a mixed solvent, which is a crucial factor for the formation of large and smooth QD thin films. The minimum amount of material consumption was achieved during the process by applying the unique coating system. A QD-LED device based on electrodeposited QDs showed a maximum luminance of 12,082 cd m −2 , maximum current efficiency of nearly 4.0 cd A −1 , and maximum EQE of 1.86%. This system demonstrates not only high reproducibility but could also pave the way for commercializing high-quality QD-LED devices.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-020-67867-w