Large-area patterning of full-color quantum dot arrays beyond 1000 pixels per inch by selective electrophoretic deposition

Jinyang Zhao, Lixuan Chen (), Dongze Li, Zhiqing Shi, Pai Liu, Zhenlei Yao, Hongcheng Yang, Taoyu Zou, Bin Zhao, Xin Zhang, Hang Zhou, Yixing Yang, Weiran Cao (), Xiaolin Yan, Shengdong Zhang () and Xiao Wei Sun ()
Additional contact information
Jinyang Zhao: Southern University of Science and Technology
Lixuan Chen: Southern University of Science and Technology
Dongze Li: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd
Zhiqing Shi: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd
Pai Liu: Southern University of Science and Technology
Zhenlei Yao: TCL Research, 1001 Zhongshan Park Road, Nanshan District
Hongcheng Yang: Southern University of Science and Technology
Taoyu Zou: Peking University
Bin Zhao: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd
Xin Zhang: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd
Hang Zhou: Peking University
Yixing Yang: TCL Research, 1001 Zhongshan Park Road, Nanshan District
Weiran Cao: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd
Xiaolin Yan: TCL Research, 1001 Zhongshan Park Road, Nanshan District
Shengdong Zhang: Peking University
Xiao Wei Sun: Southern University of Science and Technology

Nature Communications, 2021, vol. 12, issue 1, 1-8

Abstract: Abstract 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.

Date: 2021
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DOI: 10.1038/s41467-021-24931-x

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