However, the prediction ability of the single ML models in the two previous studies is not reliable and unstable, due to the generalization ability of ML models to unknown compounds depending on the size of the dataset. Unfortunately, a database including the two important properties of Tg and Td of OLED materials has not yet been constructed. However, in the past decade, a significant amount of thermal stability data for OLED materials has been published. While these published data are dispersed across a wide range of literature, they still provide a possible data source for constructing a robust machine learning model.