ORGANOMETALLIC LIGHT-EMITTING MATERIAL

PROBLEM TO BE SOLVED: To provide new electrophosphorescent materials which can be used in an organic light-emitting device. SOLUTION: New light-emitting materials provided are represented by formulas I and II E is any one of group 16 elements (including sulfur); M is any one of group 10 metals (including platinum); and R1 to R14 are each independently selected from the group consisting of H, halogeno, alkyl, substituted alkyl, aryl, and substituted aryl, with substituents selected from the group consisting of halogeno, lower alkyl and recognized donor and acceptor groups, while R1 can also be selected from (C&equiv C)n R15 (C&equiv C) represents a carbon-carbon triple bond (acetylide group); n is 1 to 10; and R15 is selected from alkyl, aryl, substituted aryl, and tri(alkyl)silyl]}.published_or_final_versio