Continuous and Controllable Liquid Transfer Guided by a Fibrous Liquid Bridge Toward High-Performance QLEDs

Continuous and Controllable Liquid Transfer Guided by a Fibrous Liquid Bridge : Toward High-Performance QLEDs

© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Détails bibliographiques
Publié dans:Advanced materials (Deerfield Beach, Fla.). - 1998. - 31(2019), 51 vom: 13. Dez., Seite e1904610
Auteur principal: Li, Xiaoxun (Auteur)
Autres auteurs: Hu, Binbin, Zhang, Min, Wang, Xiao, Chen, Ling, Wang, Aqiang, Wang, Yunjun, Du, Zuliang, Jiang, Lei, Liu, Huan
Format: Article en ligne
Langue:English
Publié: 2019
Accès à la collection:Advanced materials (Deerfield Beach, Fla.)
Sujets:Journal Article fibers liquid bridges liquid transfer quantum-dot films quantum-dot light-emitting diodes
Description
Résumé:© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Solution processing is widely used for preparing quantum dot (QD) films for fabricating QD light-emitting diode display (QLED) devices. However, current approaches suffer from either the coffee-ring effect or a large amount of wasted solution, leading to low performance and high cost. Here, a facile approach guided by a fibrous liquid bridge is developed for the continuous and controllable transfer of QD solution into ultrasmooth films by using a taut fiber with its two ends placed into capillary tubes. Guided along the fiber, a liquid bridge is formed between the horizontal fiber and the substrate, with a large mass of liquid steadily being held within the vertically placed tubes. Directionally moving the liquid bridge generates a high-quality QD film on the substrate. Particularly, the liquid consumption is quantitative, namely, in proportion to the area of the as-prepared film. Moreover, multilayered ultrasmooth red/green/blue QD films are prepared by multiple transfers of liquid onto the same targeted area in sequence. The as-prepared white QLEDs show a rather high performance with a maximum luminance of 57 190 cd m-2 and a maximum current efficiency of 15.868 cd A-1 . It is envisioned that this strategy offers new perspectives for the low-cost fabrication of high-performance QLED devices
Description:Date Completed 18.12.2019
Date Revised 30.09.2020
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:1521-4095
DOI:10.1002/adma.201904610