Patent ID: 8759819

Claim:
An organic electroluminescence device, comprising: an anode; a cathode; and an organic thin-film layer interposed between the anode and the cathode, where the organic thin-film layer comprises: a phosphorescent-emitting layer containing a host and a phosphorescent dopant; and an electron transporting layer that is provided closer to the cathode than the phosphorescent layer; the host contains a host compound comprising a substituted or unsubstituted polycyclic fused aromatic skeleton, the host compound is at least one compound selected from the group consisting of phenanthrene derivative, chrysene derivative, fluoranthene derivative and triphenylene derivative, wherein the electron transporting layer contains at least one of the compounds represented by formulae (4) or (5) below, where: X is a fused ring containing a nitrogen atom or sulfur atom; Y is selected from one of or a combination of a single bond, alkyl chain, alkylene chain, cycloalkyl chain, aryl chain, heterocyclic chain, silyl chain, ether chain or thioether chain; and q is an integer of 2 or more, wherein a molecular weight of the compound represented by the formula (4) is 480 or more, and where: A represents a substituent having a phenanthroline skeleton or benzoquinoline skeleton; B is a p-valent organic group having a structure represented by a formula (5A) below; and p is an integer of 2 or more, where: R 4 and R 5 each independently represent an alkyl group or aryl group which includes an aryl group fused to a phenyl group; l and in each independently represent an integer from 0 to 5; and Z is at least one compound selected from compounds represented by a formula (5B) below