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Three-dimensional foldable quantum dot light-emitting diodes

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Title
Three-dimensional foldable quantum dot light-emitting diodes
Author(s)
Dong Chan Kim; Huiwon Yun; Junhee Kim; Hyojin Seung; Yu, Won Seok; Ja Hoon Koo; Yang, Jiwoong; Kim, Ji Hoon; Taeghwan Hyeon; Dae-Hyeong Kim
Publication Date
2021-09
Journal
Nature Electronics, v.4, no.9, pp.671 - 680
Publisher
Nature Research
Abstract
© 2021, The Author(s), under exclusive licence to Springer Nature Limited.Flexible light-emitting devices that can transform from two-dimensional to three-dimensional (3D) forms could be of use in the development of next-generation displays. Various approaches for converting two-dimensional structures into 3D architectures have been explored, including origami methods that rely on folding along lines in which a structure has been thinned. But the fabrication of foldable 3D light-emitting devices remains challenging due, in particular, to the lack of a practical method for patterning the folding lines. Here we show that 3D foldable quantum dot light-emitting diodes (QLEDs) can be created using laser patterning and metal etch-stop layers with customized ablation thresholds. The approach allows etching to be limited to selected layers of the multilayered QLEDs, and it can be precisely tuned by using alloy-type etch-stop layers. The approach can be used to create QLED architectures with extremely small bending radii (0.047 mm), and we illustrate its capabilities by fabricating a 3D foldable passive matrix array of QLEDs that can display letters and numbers.
URI
https://pr.ibs.re.kr/handle/8788114/10783
DOI
10.1038/s41928-021-00643-4
ISSN
2520-1131
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > 1. Journal Papers (저널논문)
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