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/lp/wiley/micron-scale-patterning-of-high-quantum-yield-quantum-dot-leds-NqxvR7yZbJ
- Publisher
- Wiley
- Copyright
- © 2019 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim
- eISSN
- 2365-709X
- DOI
- 10.1002/admt.201800727
- Publisher site
- See Article on Publisher Site
Abstract
Micron‐scale resolution patterning of colloidal quantum dots (QDs) is demonstrated by adopting inkjet printing as a technique that is solvent and room temperature compatible, maintains optical and electronic properties of printed QD films, and results in minimal materials waste during the deposition process. With a combination of solvent engineering and substrate patterning single prints of PbS–CdS core–shell QDs (with peak photoluminescence emission at λ = 1270 nm wavelength) are deployed to form QD films of nanoscale‐thickness, with regular micron‐scale patterns. Inkjet printing of infrared QD films is chosen as a case study for manufacture of QD‐light emitting diodes (QD‐LEDs), and demonstrates devices with a record peak external quantum efficiency in excess of 2% that is finally comparable with state‐of‐the‐art spin‐coated prototypes.
Journal
Advanced Materials Technologies – Wiley
Published: Jul 1, 2019
Keywords: ; ; ; ;