Patent ID: 11950437
Assignee: CANON KABUSHIKI KAISHA
Field: nan (nan)
Classification: CPC H | IPC H

Claim 0:
1. An organic light emitting device comprising, in sequence, a first electrode, a first charge transport layer, a second charge transport layer in contact with the first charge transport layer, a function layer, and a second electrode,
wherein the first charge transport layer includes a first material and a second material different from the first material,
the second charge transport layer includes the second material and a third material different from the second material, and
the first material, the second material and the third material satisfy a condition (a) as follows:
(a) LUMO (the second material)−LUMO (third material)>LUMO (first material)−LUMO (second material),
where LUMO (first material), LUMO (second material), and LUMO (third material) represent a value of lowest unoccupied molecular orbital (LUMO) energy of the first material, a value of LUMO energy of the second material, and a value of LUMO energy of the third material, respectively.