研究目的
To fabricate a high-resolution OLED display using the electrohydrodynamic printing method and to discuss the mechanism and process of printing PLED displays by SIJ printer.
研究成果
The study successfully fabricated high-resolution PM displays using electrohydrodynamic printing technology, achieving resolutions of 847 PPI and 1058 PPI for dummy displays. The method demonstrates potential for high-resolution patterning in OLED displays.
研究不足
The difficulty in printing stably with small size nozzles and polymer ink with nonpolar solvents.
1：Experimental Design and Method Selection:
The study utilized electrohydrodynamic (EHD) printing technology to fabricate high-resolution OLED displays. The method involves using an electric field to pull the liquid out of a capillary nozzle, allowing for super fine patterns.
2：Sample Selection and Data Sources:
The materials used included PEDOT:PSS Clevios?P Al 4083 as the hole injection layer and PPF-SO polymer as the emissive layer. All solvents were purchased from sigma.
3：List of Experimental Equipment and Materials:
Equipment included a Brookfield Rotational Viscometer (LVDV-I+), a white interference surface profiler (Veeco, NT9300), and a microscope (Nikon DS-U3).
4：3).
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The process involved spin-coating PEDOT:PSS and PVK layers, printing the EML with a fine printer using a capillary glass nozzle, and evaporating Ba and Al layers for the cathode.
5：Data Analysis Methods:
The viscosity of the inks was measured, and the surface profile of printed film was analyzed. Images of printed patterns were taken by microscope.
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