Patent ID: 8026664

Claim:
An organic light emitting device comprising: a pair of electrodes; and an organic compound layer interposed between the pair of electrodes, wherein the organic compound layer is a light emitting layer which comprises a host material and a guest material, and wherein the guest material is a compound of formula (2): where R 1 , R 2 , and R 3 each represent a group selected from the group consisting of a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryl group, and a substituted or unsubstituted heterocyclic group, R 1 's are identical to or different from each other, R 2 's are identical to or different from each other, R 3 's are identical to or different from each other, and R 1 , R 2 , and R 3 are identical to or different from one another, a and b each represent an integer of 1 to 9, and c represents an integer of 1 to 8; and wherein the host material is selected from the group consisting of: