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US-20260126674-A1 - ELECTRO-OPTO-ACOUSTIC COMPOSITION AND ELECTRO-OPTO-ACOUSTIC DEVICE

US20260126674A1US 20260126674 A1US20260126674 A1US 20260126674A1US-20260126674-A1

Abstract

The present disclosure relates to an electro-opto-acoustic composition and an electro-opto-acoustic device, wherein, by adding a non-ionic surfactant, it is possible to improve a dielectric constant while simultaneously improving electroluminescence performance, and the electro-opto-acoustic composition according to an embodiment of the present disclosure includes a stretchable silicone rubber, a non-ionic surfactant, and copper-doped zinc sulfide (ZnS:Cu).

Inventors

  • Jin Woo Bae
  • Seung Ju Oh
  • Seungeun CHOI

Assignees

  • KOREA UNIVERSITY OF TECHNOLOGY AND EDUCATION INDUSTRY-UNIVERSITY COOPERATION FOUNDATION

Dates

Publication Date
20260507
Application Date
20250722
Priority Date
20241104

Claims (12)

  1. 1 . An electro-opto-acoustic composition comprising: a stretchable silicone rubber; a non-ionic surfactant; and copper-doped zinc sulfide.
  2. 2 . The electro-opto-acoustic composition of claim 1 , wherein the stretchable silicone rubber is Ecoflex silicone rubber.
  3. 3 . The electro-opto-acoustic composition of claim 1 , wherein the non-ionic surfactant comprises octylphenol ethoxylate.
  4. 4 . The electro-opto-acoustic composition of claim 1 , wherein the content of the non-ionic surfactant is 0.5 parts by weight to 1.5 parts by weight based on 100 parts by weight of the stretchable silicone rubber.
  5. 5 . The electro-opto-acoustic composition of claim 1 , wherein the content of the copper-doped zinc sulfide is 150 parts by weight to 250 parts by weight based on 100 parts by weight of the stretchable silicone rubber.
  6. 6 . A method for manufacturing an electro-opto-acoustic layer, the method comprising: mixing a stretchable silicone rubber (Ecoflex), a non-ionic surfactant (Triton X), and copper-doped zinc sulfide (ZnS:Cu) to prepare a mixture; coating the mixture to form a coating layer; and drying the coating layer.
  7. 7 . The method of claim 6 , wherein in the mixture, the content of the non-ionic surfactant is 0.5 parts by weight to 1.5 parts by weight based on 100 parts by weight of the stretchable silicone rubber.
  8. 8 . The method of claim 6 , wherein in the mixture, the content of the copper-doped zinc sulfide is 150 parts by weight to 250 parts by weight based on 100 parts by weight of the stretchable silicone rubber.
  9. 9 . An electro-opto-acoustic device comprising: a first electro-opto-acoustic layer disposed in one direction; a second electro-opto-acoustic layer disposed in the other direction perpendicular to the one direction and disposed to be woven with the first electro-opto-acoustic layer; first electrodes respectively disposed at one end and the other end of the first electro-opto-acoustic layer; and second electrodes respectively disposed at one end and the other end of the second electro-opto-acoustic layer, wherein the first and second electro-opto-acoustic layers are as described in claim 6 .
  10. 10 . A method for manufacturing an electro-opto-acoustic device, the method comprising: preparing a first electrode; coating an electro-opto-acoustic composition on the first electrode to form a coating layer; disposing a second electrode on the coating layer; and curing the structure in which the first electrode, the coating layer, and the second electrode are stacked, wherein the electro-opto-acoustic composition is as described in claim 1 .
  11. 11 . The method of claim 10 , wherein in the electro-opto-acoustic composition, the content of the non-ionic surfactant is 0.5 parts by weight to 1.5 parts by weight based on 100 parts by weight of the stretchable silicone rubber.
  12. 12 . The method of claim 10 , wherein in the electro-opto-acoustic composition, the content of the copper-doped zinc sulfide is 150 parts by weight to 250 parts by weight based on 100 parts by weight of the stretchable silicone rubber.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application claims priority to Korean Patent Application No. 10-2024-0154324 filed on Nov. 4, 2024 and all the benefits accruing therefrom under 35 U.S.C. § 119, the contents of which are incorporated by reference in their entirety. BACKGROUND The present disclosure relates to an electro-opto-acoustic composition and an electro-opto-acoustic device. By adding a non-ionic surfactant, it is possible to improve a dielectric constant while simultaneously improving electroluminescence performance. The present disclosure is the result (RS-2024-00348475) of research conducted with the support of the National Research Foundation of Korea with the funding from the government (Ministry of Science and ICT). With the recent development of wearable electronic devices, electro-opto-acoustic devices have attracted attention as a new type of display. Since typical displays have been limited to a function of transferring primarily visual information, there has been an emerging need for multi-functional displays that combine sound and emission functions to enrich interaction with users. Typical electroluminescent (EL) devices have attracted considerable attention as devices having a simple structure, being lightweight, having a long lifespan, and having excellent deformability. Such devices are primarily based on silver nanowires and highly conductive materials, thereby showing high luminance when a voltage is applied, but have limitations in terms of stretchability. In addition, hydrogel electrodes, which are typical flexible electrodes, provide high stretchability, but are sensitive to changes in humidity and temperature, and thus, have a problem in that the performance is unstable. Accordingly, research has been conducted to develop an electro-opto-acoustic device which simultaneously satisfies flexibility and emission performance. However, it has been difficult for typical electro-opto-acoustic devices to have both emission performance and flexibility. PRIOR ART DOCUMENT Patent Literature Korean Registered Patent Publication No. 10-2419272 SUMMARY The present disclosure provides an electro-opto-acoustic composition and an electro-opto-acoustic device, both having a high dielectric constant and excellent electroluminescence performance. The present disclosure also provides reduced sensitivity to humidity and temperature, and provides electrical stability. The present disclosure also provides a stable operation without degradation in emission and acoustic performance even at a stretchability of 200% or greater. In accordance with an exemplary embodiment of the present disclosure, an electro-opto-acoustic composition includes a stretchable silicone rubber, a non-ionic surfactant, and copper-doped zinc sulfide (ZnS:Cu). The stretchable silicone rubber may be Ecoflex silicone rubber. The non-ionic surfactant may include octylphenol ethoxylate. The content of the non-ionic surfactant may be 0.5 parts by weight to 1.5 parts by weight based on 100 parts by weight of the stretchable silicone rubber. The content of the copper-doped zinc sulfide may be 150 parts by weight to 250 parts by weight based on 100 parts by weight of the stretchable silicone rubber. In accordance with another exemplary embodiment of the present disclosure, a method for manufacturing an electro-opto-acoustic layer includes mixing a stretchable silicone rubber (Ecoflex), a non-ionic surfactant (Triton X), and copper-doped zinc sulfide (ZnS:Cu) to prepare a mixture, coating the mixture to form a coating layer, and drying the coating layer. In the mixture, the content of the non-ionic surfactant may be 0.5 parts by weight to 1.5 parts by weight based on 100 parts by weight of the stretchable silicone rubber. In the mixture, the content of the copper-doped zinc sulfide may be 150 parts by weight to 250 parts by weight based on 100 parts by weight of the stretchable silicone rubber. In accordance with another exemplary embodiment of the present disclosure, an electro-opto-acoustic device includes a first electro-opto-acoustic layer disposed in one direction, a second electro-opto-acoustic layer disposed in the other direction perpendicular to the one direction and disposed to be woven with the first electro-opto-acoustic layer, first electrodes respectively disposed at one end and the other end of the first electro-opto-acoustic layer, and second electrodes respectively disposed at one end and the other end of the second electro-opto-acoustic layer. The first and second electro-opto-acoustic layers may be as described above. In accordance with still another exemplary embodiment of the present disclosure, a method for manufacturing an electro-opto-acoustic device includes preparing a first electrode, coating an electro-opto-acoustic composition on the first electrode to form a coating layer, disposing a second electrode on the coating layer, and curing the structure in which the first electrode, the coating layer, and t