Patent ID: 6617051
Filing Date: 2003-09-09
Classification: C07C,C09K,H01L,Y10S

Abstract:
An organic electroluminescent device that comprises organic compound layer(s) including at least one organic emitting layer sandwiched between a pair of electrodes, wherein at least one organic compound layer is formed from an organic compound material having an impurity concentration of lower than 1000 ppm,and wherein said organic emitting layer comprises at least one light emitting material selected from the group consisting of (a), (b), (c), (d), (e), (f) and combinations thereof: wherein in (a), R1 and R2 may be the same or different and each independently represents an alkyl group, a cycloalkyl group, an aryl group, an alkenyl group, an alkoxy group, an aryloxy group, an amino group, or a heterocyclic group; r1 and r2 each is 0 or an integer of from 1 to 5; wherein when r1 and r2 each are an integer of 2 or more, the groups of R1's and R2's each may be the same or different, and R1's and R2's may be bonded to each other to form a ring; L1 represents a single bond or an arylene group, and the arylene group may be interrupted by an alkylene group, â€”Oâ€”, â€”Sâ€” or â€”NRâ€”, wherein R is an alkyl or aryl group; wherein in (b), R3 and R4 may be the same or different, and each independently represents an alkyl group, a cycloalkyl group, an aryl group, an alkenyl group, an alkoxy group, an aryloxy group, an amino group, or a heterocyclic group; r3 and r4 each is 0 or an integer of from 1 to 5; wherein when r3 and r4 each are an integer of 2 or more, the groups of R3's and R4's each may be the same or different, and R3's and R4's may be bonded to each other to form a ring; L2 represents a single bond or an arylene group, and the arylene group may be interrupted by an alkylene group, â€”Oâ€”, â€”Sâ€” or â€”NRâ€”, wherein R indicates an alkyl or aryl group; wherein in (c), A1 to A4 each independently represent an aryl group having from 6 to 16 carbon atoms, which aryl group may be substituted with a hydrogen atom, an alkyl group, an alkoxy group, an aryl group or an amino group; and A represents a single bond or an optionally-substituted arylene or polyarylene group; wherein in (d), Ar represents an arylene or polyarylene group; R1 to R3 each represent a hydrogen atom, an alkyl group or an aryl group; and n is an integer of from 1 to 6; wherein in (e), Ar1 to Ar4 each represent an aryl group, at least one of which is substituted with the following group: wherein R1 to R3 each represent a hydrogen atom, an alkyl group, or an aryl group; and wherein in (f), Arâ€², Arâ€³, X and Y each represent an aryl group.