CdSe/ZnS Quantum Dot Patterned Arrays for Full-Color Light-Emitting Diodes in Active-Matrix QLED Display

量子点 光电子学 全彩 有源矩阵 材料科学 有机发光二极管 发光二极管 二极管 基质(化学分析) 纳米技术 复合材料 图层(电子) 薄膜晶体管
作者
Xiaoxun Li,Shuo Sun,Yi Zhang,Xiaoying Gu,Congcong Liang,Takuo Tanaka,Jin Li
出处
期刊:ACS applied nano materials [American Chemical Society]
卷期号:7 (8): 9086-9094 被引量:10
标识
DOI:10.1021/acsanm.4c00581
摘要

Quantum dot light-emitting diodes (QLEDs) are increasingly being recognized as next-generation display technology, owing to their wide color gamut, high saturation levels, and low energy consumption. However, the primary challenge in QLED display fabrication lies in precisely depositing these inorganic quantum dot (QD) nanoparticles over a large area multiple times. Nowadays, solution processes such as inkjet printing and screen printing have been employed to address these challenges; however, they still have some trade-offs between multicolor deposition, precise spatial arrangement, and equipment cost. Here, the precise assembly of multiple QD patterned arrays on one target substrate was achieved using an asymmetric wettability interface assembly (AWIA) template, resulting in a high-pixel resolution and full-color QLED device. The asymmetric wettability interface between the top and bottom of the silicon pillar on the template allows for precise splitting and pinning of a continuous liquid film, facilitating further assembly of QD pattern arrays. Additionally, the multicolor and multishape QD pattern array was created through QD surface modification (orthogonal solvent protection) and dislocation pinning processes (reducing dissolution time) during the repetition process. Consequently, high-resolution (each pixel ≈ 10 μm; PPI ≈ 1278) full-color (yellow, cyan, violet, and white) QLED devices were fabricated efficiently. This approach offers a perspective for assembling multiple micropatterned arrays for high-resolution electronic devices.
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