Electrochromic Pressure-Sensitive Device for In Situ and Instantaneous Pressure Visualization.

Area of Science:

• Flexible electronics
• Materials science
• Sensor technology

Background:

• High sensitivity and spatial recognition are crucial for pressure sensors in electronic skins.
• In situ visualization offers a practical method for identifying pressure information.

Purpose of the Study:

• To develop an integrated electrochromic pressure sensor with naked-eye visible, in situ pressure recognition.
• To design a flexible electronic device capable of real-time pressure visualization.

Main Methods:

• Fabrication of a H₃PO₄/PVA film with hemispheric microstructures.
• Integration into an electrochromic pressure sensor for visible pressure feedback.
• Adjustment of microstructure spacing to control pressure sensing range (0-250 kPa).

Main Results:

• The sensor visually displays pressure magnitude, position, shape, and duration.
• The device demonstrates repeatable use via electrical erasing (1 V bias).
• Information display is enhanced under sunlight compared to light-emitting devices.

Conclusions:

• The developed strategy enables in situ, instantaneous, and visible pressure information recognition.
• This approach offers new insights for designing advanced flexible electronics.
• The sensor shows potential for applications requiring real-time visual feedback of mechanical stimuli.