Back to results
US 12,114,520 B2Granted
Organic light emitting device, and display apparatus, photoelectric conversion apparatus, electronic apparatus, illumination apparatus, and moving object including the same
AssigneeCanon Kabushiki Kaisha
InventorsNaoki Yamada, Satoru Shiobara, Jun Kamatani
Life of this patent
Estimating the term…
Abstract
An organic light emitting device including, in sequence, an anode, a light emitting layer, a first electron transport layer, a second electron transport layer, and a cathode, wherein the second electron transport layer includes a first material and a second material different from the first material, and the first electron transport layer includes a third material and a fourth material different from the third material.
Claims25
An organic light emitting device comprising, in sequence, an anode, a light emitting layer, a first electron transport layer, a second electron transport layer, and a cathode,
- wherein the second electron transport layer includes a first material and a second material different from the first material, and the first electron transport layer includes a third material and a fourth material different from the third material,
- wherein the first material, the second material, the third material, and the fourth material satisfy the following conditions (a) and (b):
- (a) |HOMO (first material)|>|HOMO (second material)|>|HOMO (fourth material)|
- (b) |HOMO (first material)|>|HOMO (third material)|>|HOMO (fourth material)|
- where HOMO (first material), HOMO (second material), HOMO (third material), and HOMO (fourth material) represent a value of highest occupied molecular orbital (HOMO) energy of the first material, a value of HOMO energy of the second material, a value of HOMO energy of the third material, and a value of HOMO energy of the fourth material, respectively.
2 more elements
Dependencies are inferred from the claim text.