Optoelectronic device including a light transmissive region

Patent metadata

Field	Value
Publication number	US-2022013594-A1
Application number	US-201917296188-A
Country	US
Kind code	A1
Filing date	Nov 23, 2019
Priority date	Nov 23, 2018
Publication date	Jan 13, 2022
Grant date	—

Abstract

An electroluminescent device includes: (1) a first region, a second region, and an intermediate region arranged between the first region and the second region; (2) a conductive coating disposed in the second region; and (3) a nucleation inhibiting coating disposed in the first region, the nucleation inhibiting coating extending to cover at least a portion of the intermediate region, wherein a thickness of the nucleation inhibiting coating in the intermediate region is less than a thickness of the nucleation inhibiting coating in the first region, and wherein a surface of the nucleation inhibiting coating in the first region is substantially free of the conductive coating.

First claim

1 . An electroluminescent device comprising:
a first region, a second region, and an intermediate region arranged between the first region and the second region; a conductive coating disposed in the second region; and a nucleation inhibiting coating disposed in the first region, the nucleation inhibiting coating extending to cover at least a portion of the intermediate region, wherein a thickness of the nucleation inhibiting coating in the intermediate region is less than a thickness of the nucleation inhibiting coating in the first region, and wherein a surface of the nucleation inhibiting coating in the first region is substantially free of the conductive coating.

2 . The electroluminescent device of claim 1 , wherein the conductive coating extends to cover at least a portion of the intermediate region.

3 . The electroluminescent device of claim 2 , wherein the conductive coating has a first thickness in the intermediate region, and a second thickness in the second region, the second thickness being greater than the first thickness.

4 . The electroluminescent device of claim 3 , wherein the first thickness is less than or equal to about 10% of the second thickness.

5 . The electroluminescent device of claim 3 , wherein the second thickness is from about 5 nm to about 40 nm.

6 . The electroluminescent device of claim 1 , wherein the thickness of the nucleation inhibiting coating in the intermediate region is less than about 20% of the thickness of the nucleation inhibiting coating in the first region.

7 . The electroluminescent device of claim 1 , wherein the second region is substantially free of the nucleation inhibiting coating.

8 . The electroluminescent device of claim 1 , wherein the first region includes a light transmissive region.

9 . The electroluminescent device of claim 8 , wherein the light transmittance in the light transmissive region is greater than about 50%.

10 . The electroluminescent device of claim 1 , wherein the second region includes an emissive region.

11 . The electroluminescent device of claim 1 , wherein the intermediate region is arranged to extend laterally from a perimeter of the second region towards the first region.

12 . The electroluminescent device of claim 11 , wherein the intermediate region extends laterally from about 100 nm to about 4 μm from the perimeter.

13 . The electroluminescent device of claim 11 , wherein the intermediate region extends laterally from about 300 nm and about 3 μm from the perimeter.

14 . The electroluminescent device of claim 11 , wherein the intermediate region extends laterally from the perimeter a distance of from about 10 times to about 250 times the thickness of the conductive coating in the second region.

15 . The electroluminescent device of claim 1 , wherein a surface coverage of the conductive coating in the intermediate region is less than a surface coverage of the conductive coating in the second region.

16 . The electroluminescent device of claim 15 , wherein the surface coverage of the conductive coating in the intermediate region is from about 5% to about 95%.

17 . The electroluminescent device of claim 1 , wherein the conductive coating in the intermediate region includes disconnected clusters.

18 . The electroluminescent device of claim 1 , wherein an average grain size of the conductive coating in the intermediate region is less than an average grain size of the conductive coating in the second region.

19 . The electroluminescent device of claim 18 , wherein the average grain size of the conductive coating in the intermediate region is from about 10 nm to about 50 nm.

20 . The electroluminescent device of claim 18 , wherein the average grain size of the conductive coating in the second region is greater than about 30 nm.

21 . The electroluminescent device of claim 1 , further comprising an interfacial coating disposed beneath and in direct contact with the conductive coating in the second region.

22 . The electroluminescent device of claim 21 , wherein the interfacial coating extends laterally to be disposed beneath the conductive coating in the intermediate region.

23 . The electroluminescent device of claim 22 , wherein the interfacial coating is in direct contact with the conductive coating in the intermediate region.

24 . The electroluminescent device of claim 21 , wherein the interfacial coating includes a nucleation promoting material.

25 . The electroluminescent device of claim 21 , wherein the interfacial coating is arranged under the nucleation inhibiting coating in the intermediate region.

26 . The electroluminescent device of claim 1 , wherein the conductive coating has a first light transmittance in the intermediate region, and a second light transmittance in the second region, the first light transmittance being greater than the second light transmittance.

27 . The electroluminescent device of claim 1 , wherein the conductive coating has a first light reflectance in the intermediate region, and a second light reflectance in the second region, the second light reflectance being greater than the first light reflectance.

28 . The electroluminescent device of claim 1 , wherein the conductive coating forms at least a portion of an electrode of the electroluminescent device.

29 . The electroluminescent device of claim 28 , wherein the electrode is a cathode.

30 . The electroluminescent device of claim 1 , wherein the conductive coating includes magnesium.

31 . The electroluminescent device of claim 1 , wherein the nucleation inhibiting coating extends laterally to be disposed beneath the conductive coating in the intermediate region.

32 . The electroluminescent device of claim 1 , wherein the nucleation inhibiting coating is characterized as having an initial sticking probability for a material of the conductive coating of no greater than about 0.3.

33 . The electroluminescent device of claim 1 , further comprising an auxiliary electrode, the auxiliary electrode being electrically connected to the conductive coating.

34 . An electroluminescent device comprising:
a plurality of electrodes; a bank disposed over the plurality of electrodes, the bank defining a plurality of first well regions and a plurality of second well regions, the plurality of second well regions exposing surfaces of the plurality of electrodes through the bank; a semiconducting layer disposed in the plurality of second well regions, the semiconducting layer covering the surfaces of the plurality of electrodes; a nucleation inhibiting coating disposed in the plurality of first well regions; and a conductive coating disposed over the semiconducting layer in the plurality of second well regions, wherein a surface of the nucleation inhibiting coating is substantially free of the conductive coating.

35 . The electroluminescent device of claim 34 , wherein the plurality of second well regions correspond to emissive regions, and the plurality of first well regions correspond to non-emissive regions of the electroluminescent device.

36 . The electroluminescent device of claim 34 , wherein the plurality of first well regions comprise apertures extending through the bank.

Assignees

• Oti Lumionics Inc

Inventors

• Wang Zhibin
• Chang Yi-Lu
• Wang Qi
• Helander Michael

Classifications

• H10K59/121

  characterised by the geometry or disposition of pixel elements · CPC title

• H10K59/1201 Primary

  Manufacture or treatment · CPC title

• H10K59/122

  Pixel-defining structures or layers, e.g. banks · CPC title

• H10K59/80522

  combined with auxiliary electrodes · CPC title

• H01L2251/301

  Electricity · mapped topic