Low-Voltage Stretchable Electroluminescent Devices for Sound-in-Display Electronics
발표자
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초록
내용
Interactive displays attract great attention for visualization of external stimuli that can improve human life quality through intuitive perception. Although there are many researches about visualizing mechanical stimuli, a few have studied visualizing sound waves. For sound-in-display, alternating-current electroluminescent (ACEL) devices have been used as light-emitting sources due to high brightness and stability. However, previously reported ACEL loudspeakers generated insufficient light and sound due to the low-k dielectrics. We suggest a stretchable ACEL loudspeaker that can emit high luminance and sound pressure level (SPL) at low voltage by using high-k material. The stretchable ACEL loudspeaker consists of copper-doped zinc sulfide and poly(vinylidene fluoride-co-hexafluoropropylene) composite between stretchable electrodes. Our stretchable ACEL loudspeaker shows enhanced luminance(＞ 90 cd/m2) and SPL (＞ 100 dB) at low voltage (＜ 120 V) even under stretched conditions.