有机发光二极管
材料科学
去湿
有机半导体
蒸发
光电子学
纳米技术
平版印刷术
荫罩
半导体
并五苯
薄脆饼
微透镜
薄膜晶体管
图层(电子)
薄膜
光学
物理
热力学
镜头(地质)
作者
Xiaojie Zhou,Yichen Cai,Mingsheng Xu,Jianping Li,Chenxu Sheng,Qiuyi Zhang,Xinxia Qiu,Wenchong Wang,Shisheng Xiong,Chunxiao Cong,Zhijun Qiu,Ran Liu,Laigui Hu
标识
DOI:10.1002/smtd.202101509
摘要
The emergence of near-eye displays, such as head-mounted displays, is triggering a requirement for highly enhanced display resolution. High-resolution micro-displays with micro-organic light-emitting diodes (micro-OLEDs) can be a preferential candidate, owing to the mature industrialization of OLEDs along with the advantages of flexibility, light weight, and ease of processing. However, micro-OLEDs with pixel sizes down to micrometers are difficult to be achieved using conventional techniques such as fine metal mask evaporation and lithography. Here, a solution-processing approach to pattern organic semiconductors (OSCs) for micro-OLED arrays with the assistance of templated dewetting is demonstrated. Solvents containing organic functional materials are dewetted on the surface with hydrophobic/hydrophilic patterns to form ordered droplet arrays using dip-coating. Subsequently, patterned OSC films are produced by effectively controlling solvent evaporation. Micro-OLED arrays with a pixel size down to 1 µm are successfully fabricated by further deposition of emitting/electron transport layers and top electrodes. This approach can open an avenue for low-cost manufacturing of flexible and high-resolution micro-displays.
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