Unfortunately, there is no existing database that organizes OLED materials and their properties. Currently, the thermal stability data of OLED materials are scattered throughout the literature. Therefore, experimental glass transition temperatures (Tg) for a diverse set of 1944 molecules were collected from a large number of literature using the SciFinder database. These Tg values were measured by DSC. For molecules with multiple recorded entries, an average Tg was used as the output if the variation was less than 40 K. Molecules with a Tg variation larger than 40 K were not included in the dataset. Experimental thermal decomposition temperatures (Td, corresponding to 5% weight loss) for a diverse set of 1182 OLED molecules also were collected from the literature. The Td data for these OLED molecules were measured by TGA. For molecules with multiple Td values, we compared the TGA curves in the literature and take the Td measured by the smoother TGA curve as the final value (vide Fig. ). Table lists 13 OLED compounds with multiple recorded entries. As can be seen, the deviation in Tg for compounds reported in different papers is often within 40 K.