Dual ligand exchange of Cd‐free quantum dots and optimal control of ink formulation for improving the performance of all‐inkjet‐printed quantum dot light‐emitting diodes

Quantum dot light‐emitting diodes (QD‐LEDs) have received significant attention as a next‐generation display technology aimed at large‐size panel production with lower manufacturing costs and excellent picture quality. Here, we demonstrated all‐inkjet‐printed 12.4‐in. full‐color QD‐LED display with...

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Bibliographic Details
Published in:Journal of the Society for Information Display 2024-05, Vol.32 (5), p.332-340
Main Authors: Ha, Jaekook, Lee, Sooho, Park, Myoungjin, Kim, Heunggyu, Yun Ku Jung, Han, Changyeol, Hwang, Jaekwon, Park, Gyehyun, Lee, Hak June, Bae, Wan Ki, Noh, Seunguk, Kwak, Donghoon, Kim, Sehun, Yeo‐geon Yoon, Lee, Changhee
Format: Article
Language:English
Subjects:
Carrier transport
Display devices
Ligands
Light emitting diodes
Optimal control
Production costs
Quantum dots
Transport properties
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Summary:Quantum dot light‐emitting diodes (QD‐LEDs) have received significant attention as a next‐generation display technology aimed at large‐size panel production with lower manufacturing costs and excellent picture quality. Here, we demonstrated all‐inkjet‐printed 12.4‐in. full‐color QD‐LED display with the 182‐ppi resolution. The efficiency and lifetime of inkjet‐printed QD‐LEDs were improved through the ligand exchange of Cd‐free quantum dots (QDs), red and green InP and blue ZnSeTe QDs, and optimal control of ink formulation. Dual ligands enhanced colloidal stability and carrier transport properties. The introduction of appropriate additives in the mixed solvent system improved the inkjet processibility and the morphology of inkjet‐printed layers.
ISSN:1071-0922
1938-3657
DOI:10.1002/jsid.1296