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A Universal Ternary-Solvent-Ink Strategy toward Efficient Inkjet-Printed Perovskite Quantum Dot Light-Emitting Diodes
KTH, School of Electrical Engineering and Computer Science (EECS), Electrical Engineering, Electronics and Embedded systems.ORCID iD: 0000-0002-6430-6135
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2022 (English)In: Advanced Materials, ISSN 0935-9648, E-ISSN 1521-4095, Vol. 34, no 10, p. 2107798-, article id 2107798Article in journal (Refereed) Published
Abstract [en]

Toward next-generation electroluminescent quantum dot (QD) displays, inkjet printing technique has been convinced as one of the most promising low-cost and large-scale manufacturing of patterned quantum dot light-emitting diodes (QLEDs). The development of high-quality and stable QD inks is a key step to push this technology toward practical applications. Herein, a universal ternary-solvent-ink strategy is proposed for the cesium lead halides (CsPbX3) perovskite QDs and their corresponding inkjet-printed QLEDs. With this tailor-made ternary halogen-free solvent (naphthene, n-tridecane, and n-nonane) recipe, a highly dispersive and stable CsPbX3 QD ink is obtained, which exhibits much better printability and film-forming ability than that of the binary solvent (naphthene and n-tridecane) system, leading to a much better qualitied perovskite QD thin film. Consequently, a record peak external quantum efficiency (EQE) of 8.54% and maximum luminance of 43 883.39 cd m−2 is achieved in inkjet-printed green perovskite QLEDs, which is much higher than that of the binary-solvent-system-based devices (EQE = 2.26%). Moreover, the ternary-solvent-system exhibits a universal applicability in the inkjet-printed red and blue perovskite QLEDs as well as cadmium (Cd)-based QLEDs. This work demonstrates a new strategy for tailor-making a general ternary-solvent-QD-ink system for efficient inkjet-printed QLEDs as well as the other solution-processed electronic devices in the future.

Place, publisher, year, edition, pages
Wiley , 2022. Vol. 34, no 10, p. 2107798-, article id 2107798
Keywords [en]
ink engineering, inkjet printing, perovskite, quantum dot light-emitting diode, ternary solvent ink, Cesium compounds, Ink, Lead compounds, Nanocrystals, Quantum efficiency, Semiconductor quantum dots, Solvents, Cost scale, External quantum efficiency, High quality, Ink jet, Large-scale manufacturing, Low-costs, N-tridecane, Patterned quantum dot, Quantum-dot light emitting diodes, Ternary solvents, Organic light emitting diodes (OLED)
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-320333DOI: 10.1002/adma.202107798ISI: 000748794900001PubMedID: 34990514Scopus ID: 2-s2.0-85123926160OAI: oai:DiVA.org:kth-320333DiVA, id: diva2:1704676
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QC 20221019

Available from: 2022-10-19 Created: 2022-10-19 Last updated: 2022-10-19Bibliographically approved

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Li, Jiantong

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