Light-emitting element including first layer, second layer, third layer and fourth layer
First Claim
1. A light-emitting element comprising:
- an anode;
a cathode;
a hole-transporting layer and an electron-transporting layer between the anode and the cathode; and
a layer including an organic compound between the hole-transporting layer and the electron-transporting layer,wherein the layer including an organic compound at least includes a layer serving as a light-emitting layer in which a first layer, a second layer, a third layer, and a fourth layer are stacked in that order over the anode,wherein the first layer includes a first light-emitting substance,wherein the second layer includes a second organic compound and a second light-emitting substance,wherein the third layer includes a third organic compound and a third light-emitting substance,wherein the fourth layer includes a fourth organic compound and a fourth light-emitting substance,wherein emission peak wavelengths of the first light-emitting substance and the fourth light-emitting substance are shorter than an emission peak wavelength of the third light-emitting substance,wherein the emission peak wavelength of the third light-emitting substance is shorter than an emission peak wavelength of the second light-emitting substance,wherein the fourth organic compound includes 9−
[4−
(10-phenyl-9-anthryl)phenyl]−
9H-carbazole (CzPA), andwherein the first layer does not include the 9−
[4−
(10-phenyl-9-anthryl)phenyl]−
9H-carbazole (CzPA).
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Accused Products
Abstract
A layer including an organic compound at least includes a layer serving as a light-emitting layer in which a first layer, a second layer, a third layer, and a fourth layer are stacked in that order over an anode. The first layer includes a first light-emitting substance, the second layer includes a second light-emitting substance, the third layer includes a third light-emitting substance, and the fourth layer includes a fourth light-emitting substance. Emission peak wavelengths of the first light-emitting substance and the fourth light-emitting substance are shorter than an emission peak wavelength of the third light-emitting substance, and the emission peak wavelength of the third light-emitting substance is shorter than an emission peak wavelength of the second light-emitting substance. Each of the first layer, the second layer, and the third layer has a hole-transporting property, and the fourth layer has an electron-transporting property.
25 Citations
20 Claims
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1. A light-emitting element comprising:
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an anode; a cathode; a hole-transporting layer and an electron-transporting layer between the anode and the cathode; and a layer including an organic compound between the hole-transporting layer and the electron-transporting layer, wherein the layer including an organic compound at least includes a layer serving as a light-emitting layer in which a first layer, a second layer, a third layer, and a fourth layer are stacked in that order over the anode, wherein the first layer includes a first light-emitting substance, wherein the second layer includes a second organic compound and a second light-emitting substance, wherein the third layer includes a third organic compound and a third light-emitting substance, wherein the fourth layer includes a fourth organic compound and a fourth light-emitting substance, wherein emission peak wavelengths of the first light-emitting substance and the fourth light-emitting substance are shorter than an emission peak wavelength of the third light-emitting substance, wherein the emission peak wavelength of the third light-emitting substance is shorter than an emission peak wavelength of the second light-emitting substance, wherein the fourth organic compound includes 9−
[4−
(10-phenyl-9-anthryl)phenyl]−
9H-carbazole (CzPA), andwherein the first layer does not include the 9−
[4−
(10-phenyl-9-anthryl)phenyl]−
9H-carbazole (CzPA). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A light-emitting element comprising:
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an anode; a cathode; a hole-transporting layer and an electron-transporting layer between the anode and the cathode; and a layer including an organic compound between the hole-transporting layer and the electron-transporting layer, wherein the layer including an organic compound at least includes a layer serving as a light-emitting layer in which a first layer, a second layer, a third layer, and a fourth layer are stacked in that order over the anode, wherein the first layer includes a first light-emitting substance, wherein the second layer includes a second organic compound and a second light-emitting substance, wherein the third layer includes a third organic compound and a third light-emitting substance, wherein the fourth layer includes a fourth organic compound and a fourth light-emitting substance, wherein a rate of the first light-emitting substance in the first layer is equal to or greater than 0.1 wt % and less than 50 wt %, wherein a rate of the second light-emitting substance in the second layer is equal to or greater than 0.1 wt % and less than 50 wt %, wherein a rate of the third light-emitting substance in the third layer is equal to or greater than 0.1 wt % and less than 50 wt %, wherein a rate of the fourth light-emitting substance in the fourth layer is equal to or greater than 0.1 wt % and less than 50 wt %, wherein emission peak wavelengths of the first light-emitting substance and the fourth light-emitting substance are shorter than an emission peak wavelength of the third light-emitting substance, wherein the emission peak wavelength of the third light-emitting substance is shorter than an emission peak wavelength of the second light-emitting substance, wherein the fourth organic compound includes 9−
[4−
(10-phenyl-9-anthryl)phenyl]−
9H-carbazole (CzPA), andwherein the first layer does not include the 9−
[4−
(10-phenyl-9-anthryl)phenyl]−
9H-carbazole (CzPA). - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification