Tandem Interactive Sensing Display De‐Convoluting Dynamic Pressure and Temperature

• Published in: Advanced functional materials 2021-06, Vol.31 (23), p.n/a
• Main Authors: Jin, Wookyoung, Kim, Eui Hyuk, Lee, Seokyeong, Yu, Seunggun, Han, Hyowon, Kim, Gwangmook, Lee, Seung Won, Jang, Jihye, Lee, Chang Eun, Shim, Wooyoung, Park, Cheolmin
• Format: Article
• Language: English
• Subjects: Alternating current; alternating current electroluminescence; Conducting polymers; Convolution; de‐convolution, pressure, temperature; Displays; Dynamic pressure; Electroluminescence; Luminous intensity; Materials science; Pollution monitoring; Polymers; simultaneous displays; solid‐state cathode luminescence; Stimuli; Substrates; tandem interactive sensing displays; Visualization
• ISSN: 1616-301X; 1616-3028
• DOI: 10.1002/adfm.202010492

Despite great advances in stimuli‐interactive displays, which can directly visualize pressure, temperature, and humidity, a single interactive display platform capable of quantitatively discriminating the dynamic variation of two stimuli has yet to be developed. Here, a tandem interactive sensing display demonstrates not only direct visualization of both pressure and temperature but also the quantitative de‐convolution of these two simultaneously varied stimuli. The tandem display consists of five polymer layers vertically stacked on a transparent substrate: a temperature‐responsive ionic polymer, field‐induced blue light‐emitting unit (1), conductive polymer electrode with a parallel gap, field‐induced orange‐light‐emitting unit (2), and topologically structured pressure‐responsive layer. Impedance change of the responsive layers upon dynamic temperature and pressure is monitored simultaneously, providing stimuli‐interactive electroluminescence of light‐emitting units (1) and (2), respectively, when an alternating current (AC) field is applied between two polymer electrodes. Dynamic and simultaneous variation of temperature, 30–80 °C, and pressure, 0.5–20 kPa, are conveniently mapped in 3D coordinates of light intensity (z‐axis) and color (x‐y plane), producing a 2D contour surface plot. This provides an efficient and quantitative de‐convolution of unknown combinations of temperature and pressure stimuli. Furthermore, arrays of the tandem interactive displays broaden the versatility of dynamic visualization of multiple stimuli. A tandem stimuli‐interactive sensing display is developed, allowing not only direct visualization of both pressure and temperature but also quantitative de‐convolution of the simultaneously varied stimuli, making this simple but multi‐mode sensing display platform with tandem architecture suitable for a variety of human‐interactive and health‐monitoring systems.