ORGANIC ELECTROLUMINESCENT ELEMENT AND NOVEL ALCOHOL-SOLUBLE PHOSPHORESCENT MATERIAL

摘要

Provided is an organic electroluminescent element having a light-emitting layer that can be formed by a wet process and has excellent electron-injection properties, electron-transport properties, endurance, and luminous efficacy. Also provided is a novel alcohol-soluble phosphorescent material suitable for use in the manufacture of the aforementioned organic electroluminescent element. The provided organic electroluminescent element (1) has a plurality of organic-compound layers (4, 5, 6) laminated between an anode (3) and a cathode (7). A hole-transport layer (5) comprises an organic compound that is insoluble in alcohol-based solvents. A light-emitting layer (6), which is formed by a wet process so as to contact the hole-transport layer (5) on the side thereof that faces the cathode (7), contains: a host material comprising a phosphine oxide derivative that is soluble in alcohol-based solvents; and a guest material that is soluble in alcohol-based solvents and can emit light upon electrical excitation.