Light-emitting device, display device, and electronic device

1. A light-emitting device comprising:

a first pixel comprising a first light-emitting element and a light-scattering layer; and

a second pixel comprising a second light-emitting element and a first color conversion layer,

wherein an emission center substance in each of the first light-emitting element and the second light-emitting element is an organic compound,

wherein the light-scattering layer comprises a first substance that scatters light emitted from the first light-emitting element,

wherein the first color conversion layer comprises a second substance that emits light by absorbing light emitted from the second light-emitting element,

wherein the first light-emitting element and the second light-emitting element have a microcavity structure,

wherein light emitted from the first pixel has a first color,

wherein light emitted from the second pixel has a second color,

wherein a third color is different from the first color and the second color,

wherein light with the first color is extracted from the first pixel via the light-scattering layer, and

wherein light with the third color is extracted from the second pixel without going through the light-scattering layer.

2. The light-emitting device according to claim 1 , wherein a peak wavelength of light emitted from the emission center substance is 420 nm to 480 nm.

3. The light-emitting device according to claim 1 wherein the emission center substance is a common substance in the first light-emitting element and the second light-emitting element.

4. The light-emitting device according to claim 1 wherein the first light-emitting element and the second light-emitting element have the same structure.

5. The light-emitting device according to claim 1 wherein the first substance is a microparticle of titanium oxide.

6. The light-emitting device according to claim 1 , wherein the second substance is a quantum dot.

7. The light-emitting device according to claim 1 ,

wherein the first color is blue, and

wherein the third color is green or red.

8. The light-emitting device according to claim 1 , further comprising:

a third pixel,

wherein the third pixel comprises a third light-emitting element and a second color conversion layer,

wherein the second color conversion layer comprises a third substance that emits light by absorbing light emitted from the third light-emitting element, and

wherein the third light-emitting element has a microcavity structure.

9. The light-emitting device according to claim 8 , wherein the third substance is a quantum dot.

10. The light-emitting device according to claim 8 , wherein the emission center substance is a common substance in the first light-emitting element, the second light-emitting element, and the third light-emitting element.

11. The light-emitting device according to claim 8 , wherein each of the first pixel, the second pixel and the third pixel exhibits light with a different wavelength from each other.

12. The light-emitting device according to claim 1 , wherein the light-scattering layer also serves as a blue color filter.

13. The light-emitting device according to claim 1 , wherein the first pixel further comprises a color filter.

14. An electronic device comprising:

the light-emitting device according to claim 1 ; and

one of a sensor, an operation button, a speaker and a microphone.

15. A display device comprising the light-emitting device according to claim 1 .

16. A light-emitting device comprising:

a first pixel comprising a first light-emitting element; and

a second pixel comprising a second light-emitting element and a first color conversion layer,

wherein an emission center substance in each of the first light-emitting element and the second light-emitting element is an organic compound,

wherein the first color conversion layer comprises a substance that emits light by absorbing light emitted from the second light-emitting element,

wherein each of the first light-emitting element and the second light-emitting element has a semi-transmissive and semi-reflective electrode,

wherein the first color conversion layer is interposed between the semi-transmissive and semi-reflective electrode and a semi-transmissive and semi-reflective layer,

wherein light emitted from the first light-emitting element has a first color,

wherein the first color conversion layer comprises a quantum-dot material,

wherein light with the first color is extracted from the first pixel,

wherein light with a second color is extracted from the second pixel, and

wherein the second color is different from the first color.

17. The light-emitting device according to claim 16 , wherein the semi-transmissive and semi-reflective layer has a reflectivity higher than or equal to 20% and lower than or equal to 80% with respect to light emitted from the first color conversion layer.

18. The light-emitting device according to claim 16 , further comprising a third pixel,

wherein the third pixel comprises a third light-emitting element and a second color conversion layer,

wherein λ is a peak wavelength of light emitted from the first color conversion layer, and

wherein the optical distance of a portion interposed between the semi-transmissive and semi-reflective electrode and the semi-transmissive and semi-reflective layer is the integral multiple of λ/4.