Patent ID: 7750340

Claim:
A light-emitting device comprising an anode, a cathode and an organic compound layer sandwiched between the anode and cathode, wherein the organic compound layer electrically contacting with the cathode contains: at least one phenanthroline compound represented by the following general formula [I]; and cesium carbonate (In the formula, R1, R2, R3, R4, R5, and R6 each represent a hydrogen atom, an alkyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocyclic group, or a halogen atom, R1, R2, R3, R4, R5, and R6 may be identical to or different from one another, Ar1 and Ar2 each represent a substituted or unsubstituted condensed polycyclic aromatic or condensed polyheterocyclic group, and Ar1 and Ar2 may be identical to or different from each other.)