Granted Patent B2

US 12,225,749 · App. 17/526,347 · Granted Feb 11, 2025

Inventors: Jingwen Tian (Kunshan, CN); Bing Wang (Kunshan, CN); Yin Zhang (Kunshan, CN)

Assignee: KUNSHAN GO-VISIONOX OPTO-ELECTRONICS CO., LTD

H10K50/18H10K85/631H10K2101/30H10K2102/351

Abstract

Claims (21)

1. A display panel, comprising:

a blue light-emitting device,

wherein the blue light-emitting device comprises a first electrode, an electron blocking layer, a light-emitting layer and a second electrode which are stacked; and

wherein hole mobility of the electron blocking layer is not greater than 5×10 −4 cm 2 /VS, the electron blocking layer comprises a biased electron-type material, and a mass ratio of the biased electron-type material to the electron blocking layer is 1:20 to 1:5.

2. The display panel of claim 1 , wherein a range of a thickness of the electron blocking layer is 3 to 20 nm.

3. The display panel of claim 2 , wherein a thickness of the electron blocking layer is 5 nm.

4. The display panel of claim 1 , wherein the material of the electron blocking layer is at least one of BPD or TDATA: R=H.

5. The display panel of claim 1 , wherein the biased electron-type material is at least one of PBD, 2PSP or OXD-7.

6. The display panel of claim 1 , wherein a range of the hole mobility of the electron blocking layer is 1×10 −8 to 5×10 −4 cm 2 /VS.

7. The display panel of claim 6 , wherein the hole mobility of the electron blocking layer is 5.5×10 −7 cm 2 /VS.

8. The display panel of claim 1 , wherein the blue light-emitting device further comprises a plurality of electron-transport layers, and lowest unoccupied molecular orbital energy levels of the plurality of electron-transport layers increase sequentially in a direction in which the second electrode points to the light-emitting layer.

9. The display panel of claim 1 , wherein a difference value between a lowest unoccupied molecular orbital energy level of the electron-transport layer and a lowest unoccupied molecular orbital energy level of the light-emitting layer is greater than 0.2 eV.

10. The display panel of claim 1 , wherein the first electrode is an anode, which is configured to inject electrons into the blue light-emitting device in a case where the blue light-emitting device emits light.

11. The display panel of claim 1 , wherein the second electrode is a cathode, which is configured to inject holes into the blue light-emitting device in a case where the blue light-emitting device emits light.

12. The display panel of claim 1 , wherein the light-emitting layer is an organic light-emitting layer.

13. A display apparatus, comprising the display panel of claim 1 .

14. The display apparatus of claim 13 , wherein the display apparatus is a mobile phone, a table PC or a wearable device.

15. The display apparatus of claim 13 , wherein a range of a thickness of the electron blocking layer is 3 to 20 nm.

16. The display apparatus of claim 15 , wherein a thickness of the electron blocking layer is 5 nm.

17. The display apparatus of claim 13 , wherein the material of the electron blocking layer is at least one of BPD or TDATA: R=H.

18. The display apparatus of claim 13 , wherein the biased electron-type material is at least one of PBD, 2PSP or OXD-7.

Assignments (3)

Priority Claims (1)

Continuity (2)

References Cited (21)