고기능성 파장 제어 기능을 가지는 ITO/Ag/ITO/Ag/ITO 다층구조의 설계와 응용 방안
Design and Application of ITO/Ag/ITO/Ag/ITO Multilayer Structure with Effective Control of Electromagnetic Wave Function
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Effective control of electromagnetic waves is critical for efficient energy utilization and other relevant applications. In particular, the active management of long-wavelength infrared (IR) radiation would be useful in energy conservation and military defense. Herein, we propose an efficient approach to control the electromagnetic waves of light by suppressing the short wavelength range of UV light and long wavelength range of IR light while maintaining visual transparency to human eyes. For effective infrared control, we propose an OMOMO (oxide/metal/oxide/metal/oxide) structure in which metal oxides and metal layers are deposited on an OMO (oxide/metal/oxide) structure. The novel hybrid structure of metal and metal-oxide films are alternated to form multiple ITO/Ag/ITO/Ag/ITO interfaces. To confirm the features of the IR control interface, the optical and electrical properties were investigated in terms of transmittance, reflectance resistance, and electromagnetic interface (EMI) shielding efficiency. The ITO/Ag/ITO/Ag/ITO multilayer structure exhibited an excellent optical transmittance of 65.43% and substantial reflectance of 94.02% at long wavelengths. The overall EMI shielding was highly effective, reaching 40.59 dB. This suggests that functional transparent films can be adopted in military, energy, and transparent device applications.
Abstract
Effective control of electromagnetic waves is critical for efficient energy utilization and other relevant applications. In particular, the active management of long-wavelength infrared (IR) radiation would be useful in energy conservation and military defense. Herein, we propose an efficient approach to control the electromagnetic waves of light by suppressing the short wavelength range of UV light and long wavelength range of IR light while maintaining visual transparency to human eyes. For effective infrared control, we propose an OMOMO (oxide/metal/oxide/metal/oxide) structure in which metal oxides and metal layers are deposited on an OMO (oxide/metal/oxide) structure. The novel hybrid structure of metal and metal-oxide films are alternated to form multiple ITO/Ag/ITO/Ag/ITO interfaces. To confirm the features of the IR control interface, the optical and electrical properties were investigated in terms of transmittance, reflectance resistance, and electromagnetic interface (EMI) shielding efficiency. The ITO/Ag/ITO/Ag/ITO multilayer structure exhibited an excellent optical transmittance of 65.43% and substantial reflectance of 94.02% at long wavelengths. The overall EMI shielding was highly effective, reaching 40.59 dB. This suggests that functional transparent films can be adopted in military, energy, and transparent device applications.
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