Adhesive transparent electrode and method of fabricating the same

Patent metadata

Field	Value
Publication number	US-11653510-B2
Application number	US-201816169174-A
Country	US
Kind code	B2
Filing date	Oct 24, 2018
Priority date	Jan 5, 2018
Publication date	May 16, 2023
Grant date	May 16, 2023

Abstract

Disclosed are an adhesive transparent electrode and a method of fabricating the same. More particularly, an adhesive transparent electrode according to an embodiment of the present disclosure includes a substrate and an adhesive silicone-based polymer matrix, in which a metal nanowire network is embedded, deposited on the substrate, wherein the adhesive silicone-based polymer matrix includes a silicone-based polymer including a silicone-based polymer base and a silicone-based polymer crosslinker; and a non-ionic surfactant.

First claim

What is claimed is:

1. An adhesiveness transparent electrode comprising an adhesive silicone-based polymer matrix in which a metal nanowire network is embedded,
wherein the adhesive silicone-based polymer matrix comprises a silicone-based polymer comprising a silicone-based polymer base and a silicone-based polymer crosslinker; and a non-ionic surfactant,
wherein a weight ratio of the silicone-based polymer base to the silicone-based polymer crosslinker is 10:1, and a weight ratio of the non-ionic surfactant in the adhesive silicone-based polymer matrix is from 0.3 wt % to 0.4 wt %,
wherein the adhesive silicone-based polymer matrix comprises a heterogeneously crosslinked network composed of crosslinked silicone-based polymer and non-crosslinked silicone-based polymer and formed in the adhesive silicone-based polymer matrix by the non-ionic surfactant,
wherein Young's modulus and adhesion force of the adhesive silicone-based polymer matrix having the heterogeneously crosslinked network formed therein is modulated by adding the non-ionic surfactant, and
wherein Young's modulus of the adhesive silicone-based polymer matrix is in a range of 31.7 kPa to 45 kPa.

2. The adhesiveness transparent electrode according to claim 1 , wherein the adhesive transparent electrode is fabricated by coating a dispersing solution comprising the silicone-based polymer base, the silicone-based polymer crosslinker, and the non-ionic surfactant on a substrate on which the metal nanowire network is formed,
heat-hardening the coated dispersing solution to form the adhesive silicone-based polymer matrix in which the metal nanowire network is embedded, and
separating the adhesive silicone-based polymer matrix from the substrate.

3. The adhesiveness transparent electrode according to claim 1 , wherein crosslinking reaction of the silicone-based polymer is hindered and mechanical characteristics of the adhesive silicone-based polymer matrix are improved, due to interaction between a platinum (Pt) catalyst, present in the silicone-based polymer crosslinker, and polar functional groups, present in the non-ionic surfactant.

4. The adhesiveness transparent electrode according to claim 1 , wherein the metal nanowire network is embedded in the adhesive silicone-based polymer matrix due to interaction between polar functional groups, present in the non-ionic surfactant, and polar functional groups, present in the metal nanowire network.

5. The adhesiveness transparent electrode according to claim 1 , wherein the non-ionic surfactant is 4-(1,1,3,3-tetramethylbutyl)phenyl-polyethylene glycol.

6. The adhesiveness transparent electrode according to claim 1 , wherein the silicone-based polymer is polydimethylsiloxane (PDMS).

7. A method of fabricating an adhesive transparent electrode, the method comprising:
forming a metal nanowire network on a substrate;
coating a dispersing solution comprising a silicone-based polymer base, a silicone-based polymer crosslinker, and a non-ionic surfactant on the substrate on which the metal nanowire network is formed; and
heat-hardening the dispersing solution coated on the substrate, on which the metal nanowire network is formed, to form an adhesive silicone-based polymer matrix in which the metal nanowire network is embedded,
wherein a weight ratio of the silicone-based polymer base to the silicone-based polymer crosslinker is 10:1, and a weight ratio of the non-ionic surfactant in the adhesive silicone-based polymer matrix is from 0.3 wt % to 0.4 wt %,
wherein the adhesive silicone-based polymer matrix comprises a heterogeneously crosslinked network composed of crosslinked silicone-based polymer and non-crosslinked silicone-based polymer and formed in the adhesive silicone-based polymer matrix by the non-ionic surfactant,
wherein Young's modulus and adhesion force of the adhesive silicone-based polymer matrix having the heterogeneously crosslinked network formed therein is modulated by adding the non-ionic surfactant, and
wherein Young's modulus of the adhesive silicone-based polymer matrix is in a range of 31.7 kPa to 45 kPa.

8. The method according to claim 7 , further comprising separating the adhesive silicone-based polymer matrix, in which the metal nanowire network is embedded, from the substrate.

9. The method according to claim 7 , wherein the forming comprises:
coating a metal nanowire solution on the substrate; and
annealing the substrate coated with the metal nanowire solution.

10. The method according to claim 7 , wherein the silicone-based polymer is polydimethylsiloxane, and the metal nanowire network is a silver (Ag) nanowire network.

11. The method according to claim 9 , wherein the annealing is performed at 100° C. to 180° C. for 5 minutes to 20 minutes.

12. The method according to claim 10 , wherein the heat hardening is performed at 40° C. to 80° C. for 8 hours to 12 hours.

13. An optoelectronic device, an electrocardiogram (ECG) sensor, an electromyogram (EMG) sensor and a transparent film heater to which the adhesive transparent electrode according to claim 1 is applied.

Assignees

• Univ Yonsei Iacf

Inventors

• Park Jin Woo
• Kim Jin Hoon

Classifications

• H10D64/0114

  to diamond, semiconducting diamond-like carbon or graphene · CPC title

• H10K30/82 Primary

  Transparent electrodes, e.g. indium tin oxide [ITO] electrodes · CPC title

• A61N1/042 Primary

  Material of the electrode · CPC title

• H10D64/60

  Electrodes characterised by their materials · CPC title

• H10H20/818

  within the light-emitting regions · CPC title