Thermodynamic-driven polychromatic quantum dot patterning for light-emitting diodes beyond eye-limiting resolution

The next-generation wearable near-eye displays inevitably require extremely high pixel density due to significant decrease in the viewing distance. For such denser and smaller pixel arrays, the emissive material must exhibit wider colour gamut so that each of the vast pixels maintains the colour acc...

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Bibliographic Details
Published in:Nature communications 2020-06, Vol.11 (1), p.3040-3040, Article 3040
Main Authors: Nam, Tae Won, Kim, Moohyun, Wang, Yanming, Kim, Geon Yeong, Choi, Wonseok, Lim, Hunhee, Song, Kyeong Min, Choi, Min-Jae, Jeon, Duk Young, Grossman, Jeffrey C., Jung, Yeon Sik
Format: Article
Language:English
Subjects:
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Arrays
Color
Electroluminescence
Electrons
Humanities and Social Sciences
Immersion
Light emitting diodes
multidisciplinary
Optoelectronics
Pixels
Printing
Quantum dots
Science
Science (multidisciplinary)
Submerging
Transfer printing
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Summary:The next-generation wearable near-eye displays inevitably require extremely high pixel density due to significant decrease in the viewing distance. For such denser and smaller pixel arrays, the emissive material must exhibit wider colour gamut so that each of the vast pixels maintains the colour accuracy. Electroluminescent quantum dot light-emitting diodes are promising candidates for such application owing to their highly saturated colour gamuts and other excellent optoelectronic properties. However, previously reported quantum dot patterning technologies have limitations in demonstrating full-colour pixel arrays with sub-micron feature size, high fidelity, and high post-patterning device performance. Here, we show thermodynamic-driven immersion transfer-printing, which enables patterning and printing of quantum dot arrays in omni-resolution scale; quantum dot arrays from single-particle resolution to the entire film can be fabricated on diverse surfaces. Red-green-blue quantum dot arrays with unprecedented resolutions up to 368 pixels per degree is demonstrated. Designing quantum dot light emitting diodes with full-colour pixel arrays with sub-micron feature size remains a challenge. Here, the authors demonstrate red-green-blue quantum dots arrays with resolutions up to 368 pixels per degree by leveraging thermodynamic-driven immersion transfer-printing.
ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-020-16865-7