Machine Learning Algorithm for Artificial Intelligence-Based Precise Structural Modeling in Organic Light-Emitting Diodes

Developing organic light-emitting diodes (OLEDs) with a desired emission color and efficiency involves complex efforts in material selection and optimizing the device structure due to their multilayered architectures. Notably, the cavity structure in the OLEDs allows for a wide range of emission colors and efficiencies based on the thicknesses and optical constants of the layers, even within a specific material set. Conventional approaches to achieving optimized OLED designs can prove to be financial-, labor-, and time-intensive for researchers, considering the multitude of combinations necessary for the complex, multilayered structure. To address these challenges, this study introduces a novel machine learning (ML) algorithm capable of intelligently predicting the ideal device structure for OLEDs, considering organic layer thicknesses and refractive indexes. The rule-based ML algorithm exhibits impressive accuracy, with an error margin of less than 0.5% for red-, green-, and blue-emitting OLEDs. These findings emphasize the potential of the ML algorithm as an invaluable solution to streamline the process of obtaining optimized OLED designs, offering substantial time and resource savings with high precision.