Journal
NATURE COMMUNICATIONS
Volume 12, Issue 1, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41467-021-24931-x
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Funding
- National Key Research and Development Program of China [2016YFB0401702]
- National Natural Science Foundation of China [62004008]
- Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd
- Guangdong Province's Key R&D Program: Micro-LED Display and Ultra-high Brightness Micro-display technology [2019B010925001]
- Guangdong University Key Laboratory for Advanced Quantum Dot Displays and Lighting [2017KSYS007]
- Shenzhen Key Laboratory for Advanced Quantum Dot Displays and Lighting [ZDSYS201707281632549]
- Shenzhen Peacock Team Project [KQTD2016030111203005]
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Researchers present a method for large-area patterning of full-color colloidal quantum dots using a combination of photolithography and selective electrophoretic deposition technique, proposing a manufacture-viable technology for QD-based displays.
Colloidal quantum dot (QD) emitters show great promise in the development of next-generation displays. Although various solution-processed techniques have been developed for nanomaterials, high-resolution and uniform patterning technology amicable to manufacturing is still missing. Here, we present large-area, high-resolution, full-color QD patterning utilizing a selective electrophoretic deposition (SEPD) technique. This technique utilizes photolithography combined with SEPD to achieve uniform and fast fabrication, low-cost QD patterning in large-area beyond 1,000 pixels-per-inch. The QD patterns only deposited on selective electrodes with precisely controlled thickness in a large range, which could cater for various optoelectronic devices. The adjustable surface morphology, packing density and refractive index of QD films enable higher efficiency compared to conventional solution-processed methods. We further demonstrate the versatility of our approach to integrate various QDs into large-area arrays of full-color emitting pixels and QLEDs with good performance. The results suggest a manufacture-viable technology for commercialization of QD-based displays. Colloidal quantum dots are promising for next-generation displays, yet the technology to realise high-resolution and uniform patterning is still scarce. Here, the authors report full-colour QD large area patterning by combining photolithography and selective electrophoretic deposition technique.
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