DSMC-Neutrals Case Study - OLED Simulation
DSMC-Neutrals is a 3D rarefied gas analysis software package that utilizes the Direct Simulation Monte Carlo (DSMC) method. By employing an unstructured mesh, it enables simulations of complex geometries. It also supports chemical reaction calculations, making it suitable not only for simulating rarefied gas flows within vacuum chambers but also for modeling thin-film deposition in semiconductor manufacturing processes such as Chemical Vapor Deposition (CVD). If reading this article has made you even slightly interested in rarefied gas analysis or gas flow simulation, please feel free to contact us at any time to request materials or for further information.
Organic Electro-Luminescence (OLED) Simulation
The following presents a case study of a simulation of organic luminescence (OLED), which involves the crystallization of organic films. The gas pressure is 3 Pa, which falls within the medium vacuum range. The simulation results shown below demonstrate that DSMC-Neutrals successfully reproduces the experiments conducted by Shtein et al. Although this calculation example omits the calculations for the evaporation cell and the nozzle, DSMC-Neutrals incorporates a deposition model, making it possible to calculate the gas flow within the evaporation cell and the nozzle.
▲ Computational Domain and Boundary Conditions
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▲ Results. (Left) Alq3 density distribution $[/m^3]$. F: Carrier gas flow rate; T: Organic material temperature. (Right) Inverse of the deposition rate $1/r_{dep}$ vs. square root of the carrier gas flow rate $\sqrt{\dot{v}}$. □: DSMC-Neutrals; Others: Experimental.
Reference
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Takao Wada and Noriaki Ueda, J. Appl. Phys. 113, 154503 (2013),
http://dx.doi.org/10.1063/1.4799055
