Three-dimensional foldable quantum dot light-emitting diodes
- Authors
- Kim, Dong Chan; Yun, Huiwon; Kim, Junhee; Seung, Hyojin; Yu, Won Seok; Koo, Ja Hoon; Yang, Jiwoong; Kim, Ji Hoon; Hyeon, Taeghwan; Kim, Dae-Hyeong
- Issue Date
- Sep-2021
- Publisher
- NATURE PORTFOLIO
- Citation
- NATURE ELECTRONICS, v.4, no.9, pp.671 - 680
- Journal Title
- NATURE ELECTRONICS
- Volume
- 4
- Number
- 9
- Start Page
- 671
- End Page
- 680
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/88179
- DOI
- 10.1038/s41928-021-00643-4
- ISSN
- 2520-1131
- Abstract
- 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. Two-dimensional arrays of quantum dot light-emitting diodes can be folded into three-dimensional architectures-including a passive matrix array that can display letters and numbers-by using laser patterning and metal etch-stop layers to create folding lines.
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