Lee Hyejin, Kang Dong-Hee, Cho Seungse, Kim Young-Ryul, Lee Youngoh, Na Sangyun, Cho Haryeong, Lee Seungjae, Lim Geumseok, Yeom Jeonghee, Ko Hyunhyub
School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan Metropolitan City 44919, Republic of Korea.
ACS Appl Mater Interfaces. 2023 Mar 29;15(12):16299-16307. doi: 10.1021/acsami.3c00732. Epub 2023 Mar 16.
Stretchable sound-in-displays, which can generate synchronous sound and light directly from the display without a separate speaker, allow immersive audio and visual perception even on curved surfaces. In stretchable sound-in-displays, alternating current electroluminescent (ACEL) devices have been used as light-emitting sources owing to their high brightness and stability. However, stretchable ACEL devices that use low dielectric constant (κ) materials require a high operating voltage for generating light and sound. Herein, we demonstrate a stretchable ACEL loudspeaker with a low operating voltage using stretchable high-κ dielectrics and strain-insensitive electrodes. Our device exhibits 87.7 cd/m of luminance and 79.70 dB of sound pressure level at an operating voltage of 120 V and 10 kHz. As the next platform of wearable devices, the suggested ACEL loudspeaker exhibits high-quality synchronous light and sound generation performance even under various types of mechanical deformation, such as finger flexion and wrist bending.
可拉伸的集成声音显示器能够直接从显示屏产生同步的声光，无需单独的扬声器，即使在曲面上也能实现沉浸式的视听体验。在可拉伸的集成声音显示器中，交流电致发光（ACEL）器件因其高亮度和稳定性而被用作发光源。然而，使用低介电常数（κ）材料的可拉伸ACEL器件在产生光和声音时需要高工作电压。在此，我们展示了一种使用可拉伸的高κ电介质和应变不敏感电极的低工作电压可拉伸ACEL扬声器。我们的器件在120 V和10 kHz的工作电压下，亮度为87.7 cd/m²，声压级为79.70 dB。作为可穿戴设备的下一个平台，所提出的ACEL扬声器即使在各种类型的机械变形（如手指弯曲和手腕弯曲）下，也能展现出高质量的同步光和声音产生性能。
