Laser oscillator
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsHiroko Abe, Satoshi Seo
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Abstract
A laser oscillator is disclosed by means of current excitation by using a light-emitting element containing an organic matter. The present invention is a semiconductor device oscillating laser by current excitation comprising a light-emitting element having a laminated body which is formed by stacking sequentially a first layer made from an organic matter, a second layer containing an organic matter and a metal compound, and a third layer made from an organic matter interposed; and a first electrode and a second electrode formed over a substrate, the electrodes interposing the laminated body therebetween; wherein the organic matter contained in the second layer includes at least a light-emitting material.
Claims22
A laser oscillator comprising:
- a first electrode over a substrate;
- a first layer comprising a first organic material over the first electrode;
- a second layer comprising a second organic material on the first layer, the second organic material comprising at least a light-emitting material;
- a third layer comprising a third organic material on the second layer;
- and
- a second electrode over the third layer;
- wherein the second layer further comprises a metal compound.
A laser oscillator comprising:
- a first electrode over a substrate;
- a first layer comprising a first organic material over the first electrode;
- a second layer comprising a second organic material on the first layer, the second organic material comprising at least a light-emitting material;
- a third layer comprising a third organic material on the second layer;
- and
- a second electrode over the third layer;
- wherein the second layer further comprises a metal compound;
- and
- wherein a thickness de of the second layer fulfills de=mλ/2ne (m is an integer of 1 or more) assuming that a refractive index of the second layer is ne.
A laser oscillator comprising:
- a first electrode over a substrate;
- an electron injecting and transporting layer over the first electrode;
- a light-emitting layer on the electron injecting and transporting layer, the light-emitting layer comprising at least a light-emitting material;
- a hole injecting and transporting layer on the light-emitting layer;
- and
- a second electrode over the hole injecting and transporting layer;
- wherein the light-emitting layer further comprises a metal compound;
- and
- wherein a thickness de of the second layer fulfills de=mλ/2ne (m is an integer of 1 or more) assuming that a refractive index of the second layer is ne.
A laser oscillator comprising:
- a first electrode over a substrate;
- a hole injecting layer over the first electrode;
- a hole transporting layer over the hole injecting layer;
- a light-emitting layer comprising an organic material on the hole transporting layer, the organic material comprising at least a light-emitting material;
- an electron transporting layer on the light-emitting layer;
- an electron injecting layer over the electron transporting layer;
- a second electrode over the electron injecting layer;
- wherein the second layer further comprises a metal compound;
- and
- wherein a thickness de of the second layer fulfills de=mλ/2ne (m is an integer of 1 or more) assuming that a refractive index of the second layer is ne.
Dependencies are inferred from the claim text.