Sumitomo Chemical has been established in 1913, and since then has been researching and producing industrial chemicals and materials. Sumitomo has been working with CDT on P-OLED materials, and has acquired the company in July 2007.
Sumitomo is focused on OLED materials for lighting (after their partnership with Panasonic for OLED TVs did not take off). In early 2016 the OLED-A published the performance of Sumitomo's soluble OLED materials.
Sumitomo's materials are used by JOLED in its printed monitors, and in 2018 Sumitomo invested in JOLED.