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Simulation of organic light-emitting diode-based inkjet printing using a piezoelectric fluid structural interaction
Dong Yeol Shin1,2, Jaebum Jeong1, Woo Jin Jeong1
1Department of Semiconductor Engineering, Gyeongsang National University, Jinjudae-ro 501 Beon-gil, Jinju-si, 52828, Republic of Korea.
Scientific Reports
|August 24, 2025
Summary
This study uses Ansys simulations to find stable inkjet printing conditions for organic/quantum dot light-emitting diode displays. Researchers identified key factors for consistent ink droplet formation, crucial for advanced display manufacturing.
Area of Science:
- Materials Science
- Fluid Dynamics
- Manufacturing Engineering
Background:
- Inkjet printing is key for manufacturing organic/quantum dot light-emitting diode (OLED/QLED) displays.
- Stable ink droplet formation and precise process control are critical for successful inkjet printing.
- Understanding fluid behavior, especially non-Newtonian inks, is essential for optimizing printing processes.
Purpose of the Study:
- To establish stable inkjet printing conditions for OLED/QLED displays using computational simulations.
- To investigate the behavior of both Newtonian and non-Newtonian inks during the inkjet printing process.
- To compare simulation results with experimental data to validate the predictive capabilities of the models.
Main Methods:
- Utilized Ansys Fluent and Ansys Mechanical for combined fluid dynamics and mechanical simulations.
- Performed jetting simulations for Newtonian fluids to verify the simulation approach.
- Simulated a commercial non-Newtonian ink with shear-rate-dependent viscosity.
- Compared simulation outcomes with experimental results for both fluid types.
Main Results:
- Identified specific conditions required for stabilizing ink droplets during inkjet printing.
- Validated the simulation methodology through comparisons with experimental data for Newtonian fluids.
- Observed discrepancies between simulation and experimental results for non-Newtonian fluids, prompting further analysis.
- Revealed pressure variations within the inkjet nozzle during the printing process.
Conclusions:
- The study successfully established conditions for stable ink droplet formation in inkjet printing for advanced displays.
- Computational simulations provide a viable method for optimizing inkjet printing processes for OLED/QLED manufacturing.
- Further investigation is needed to fully reconcile simulation and experimental results for non-Newtonian fluids, highlighting the complexity of their behavior.
