Electroluminescent device and manufacturing method thereof and display device

1. An electroluminescent device, comprising:

a base substrate; and

an electron transport layer, disposed on the base substrate,

wherein the electron transport layer includes a first film layer for transporting electrons and a regulating structure arranged in contact with the first film layer, and the regulating structure is configured to regulate an electron mobility of the electron transport layer, and a material of the regulating structure includes graphene oxide.

2. The electroluminescent device according to claim 1 , wherein the regulating structure includes:

a second film layer, arranged in contact with the first film layer;

wherein the second film layer has an electron mobility less than that of the first film layer.

3. The electroluminescent device according to claim 2 , wherein the electron transport layer includes at least two first film layers, and the second film layer is disposed between the two first film layers.

4. The electroluminescent device according to claim 2 , wherein the second film layer has a thickness of 1-2 nm.

5. The electroluminescent device according to claim 1 , wherein a material of the second film layer includes graphene oxide.

6. The electroluminescent device according to claim 1 , wherein the regulating structure includes a regulator doped in the first film layer.

7. The electroluminescent device according to claim 6 , wherein a material of the regulator includes graphene oxide.

8. The electroluminescent device according to claim 1 , wherein a material of the first film layer includes an inorganic material.

9. The electroluminescent device according to claim 7 , wherein a material of the first film layer includes zinc oxide (ZnO) quantum dots or magnesium zinc oxide (ZnMgO) quantum dots.

10. The electroluminescent device according to claim 1 , further comprising:

an anode disposed on the base substrate;

a hole transport layer disposed on the anode;

a light-emitting layer disposed on the hole transport layer; and

a cathode disposed on the electron transport layer,

wherein the electron transport layer is located between the light-emitting layer and the cathode.

11. The electroluminescent device according to claim 10 , wherein a material of the light-emitting layer includes quantum dots.

12. A display apparatus, comprising the electroluminescent device according to claim 1 .

13. A manufacturing method for an electroluminescent device, comprising:

forming an electron transport layer on a base substrate,

wherein the electron transport layer includes a first film layer for transporting electrons and a regulating structure arranged in contact with the first film layer, and the regulating structure is configured to regulate an electron mobility of the electron transport layer, and the regulating structure is formed by using graphene oxide.

14. The manufacturing method according to claim 13 , further comprising:

forming a second film layer in contact with the first film layer, wherein the regulating structure includes the second film layer.

15. The manufacturing method according to claim 14 , wherein the electron transport layer includes at least two first film layers, the manufacturing method comprising:

forming the second film layer between two adjacent first film layers.

16. The manufacturing method according to claim 13 , further comprising:

doping a regulator into the first film layer, wherein the regulating structure includes the regulator doped into the first film layer.

17. The manufacturing method according to claim 16 , further comprising:

dissolving a conductive material to prepare a conductive solution, for forming the first film layer;

dissolving the regulator to prepare a regulating solution;

adding the regulating solution into the conductive solution to form a mixed solution; and

using the mixed solution to form the electron transport layer.

18. The manufacturing method according to claim 13 , further comprising:

mixing graphite powder, sodium nitrate and concentrated sulfuric acid;

adding a catalyst;

separating graphite oxide out after reaction is finished; and

using the graphite oxide to prepare a graphene oxide solution and adding the graphene oxide solution into the conductive solution to form the mixed solution.

19. The manufacturing method according to claim 18 , wherein the catalyst is potassium permanganate, and after the reaction is finished, hydrogen peroxide is added to reduce the residual potassium permanganate into manganese dioxide; and the graphite oxide is separated out after filtering and washing for many times.