Inkjet-printed multi-color arrays based on eco-friendly quantum dot light emitting diodes with tailored hole transport layer
Authors
Suh, YH
Fan, XB
Yang, J
Ni, L
Kim, Y
Jo, JW
Choi, HW
Jung, SM
Shin, DW
Kim, JM
Publication Date
2022Journal Title
Journal of the Society for Information Display
ISSN
1071-0922
Publisher
Wiley
Language
en
Type
Article
This Version
AO
VoR
Metadata
Show full item recordCitation
Zhan, S., Suh, Y., Fan, X., Yang, J., Ni, L., Kim, Y., Jo, J., et al. (2022). Inkjet-printed multi-color arrays based on eco-friendly quantum dot light emitting diodes with tailored hole transport layer. Journal of the Society for Information Display https://doi.org/10.1002/jsid.1133
Abstract
Abstract: Cadmium‐free quantum dot light‐emitting diodes (QLEDs) have held the potential to revolutionize the next‐generation displays with their advantages in color gamut, luminance intensity, and solution processibility. As a promising way of realizing large‐area QLED display production, inkjet printing has been intensively studied on Cd‐based QLEDs but lacks exploration in fabricating Cd‐free devices. Here, we developed Cd‐free RGB inkjet‐printed QLEDs with tailored hole transport layers (t‐HTLs) using Cd‐free QDs including InP/ZnSeS red and green QDs and ZnTeSe/ZnSe/ZnS blue QDs. With the t‐HTLs, QD ink erosion on the bottom charge transport layer was remarkably suppressed, while the efficient hole transport was maintained, which kept high device performance, especially in the QLED lifetime. With bank structures, Cd‐free QLED pixels were well defined within the size of 60 μm × 160 μm. Based on the t‐HTL structure and the bank structures, inkjet‐printed Cd‐free RGB QLED pixel arrays were demonstrated. This study bridges the gap between existing Cd‐free QLED technologies and the future commercialization of Cd‐free self‐emissive QD displays.
Keywords
RESEARCH ARTICLE, RESEARCH ARTICLES, bank structure, cd‐free RGB QDs, inkjet printing, QLEDs, tailored hole transport layer
Sponsorship
European Commission Horizon 2020 (H2020) Research Infrastructures (RI) (685758)
Engineering and Physical Sciences Research Council (EP/P027628/1)
Identifiers
jsid1133
External DOI: https://doi.org/10.1002/jsid.1133
This record's URL: https://www.repository.cam.ac.uk/handle/1810/336415
Rights
Licence:
http://creativecommons.org/licenses/by/4.0/
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