COMPOSITION, AND LIGHT-EMITTING ELEMENT USING SAME

摘要

Provided is a composition that contains a dendron-containing phosphorescent compound (DB), which has an emission-spectrum maximum peak wavelength of at least 400 nm but lower than 480 nm, and a dendron-containing phosphorescent compound (DGR), which has an emission-spectrum maximum peak wavelength of at least 480 nm but lower than 680 nm in.