Orthogonal colloidal quantum dot inks enable efficient multilayer optoelectronic devices

Seungjin Lee, Min-Jae Choi, Geetu Sharma, Margherita Biondi, Bin Chen, Se-Woong Baek, Amin Morteza Najarian, Maral Vafaie, Joshua Wicks, Laxmi Kishore Sagar, Sjoerd Hoogland, F. Pelayo García Arquer, Oleksandr Voznyy () and Edward H. Sargent ()
Additional contact information
Seungjin Lee: University of Toronto
Min-Jae Choi: University of Toronto
Geetu Sharma: University of Toronto Scarborough
Margherita Biondi: University of Toronto
Bin Chen: University of Toronto
Se-Woong Baek: University of Toronto
Amin Morteza Najarian: University of Toronto
Maral Vafaie: University of Toronto
Joshua Wicks: University of Toronto
Laxmi Kishore Sagar: University of Toronto
Sjoerd Hoogland: University of Toronto
F. Pelayo García Arquer: University of Toronto
Oleksandr Voznyy: University of Toronto Scarborough
Edward H. Sargent: University of Toronto

Nature Communications, 2020, vol. 11, issue 1, 1-8

Abstract: Abstract Surface ligands enable control over the dispersibility of colloidal quantum dots (CQDs) via steric and electrostatic stabilization. Today’s device-grade CQD inks have consistently relied on highly polar solvents: this enables facile single-step deposition of multi-hundred-nanometer-thick CQD films; but it prevents the realization of CQD film stacks made up of CQDs having different compositions, since polar solvents redisperse underlying films. Here we introduce aromatic ligands to achieve process-orthogonal CQD inks, and enable thereby multifunctional multilayer CQD solids. We explore the effect of the anchoring group of the aromatic ligand on the solubility of CQD inks in weakly-polar solvents, and find that a judicious selection of the anchoring group induces a dipole that provides additional CQD-solvent interactions. This enables colloidal stability without relying on bulky insulating ligands. We showcase the benefit of this ink as the hole transport layer in CQD optoelectronics, achieving an external quantum efficiency of 84% at 1210 nm.

Date: 2020
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/s41467-020-18655-7 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-18655-7

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-020-18655-7

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().