A method for quantitatively separating the piezoelectric component from the as-received "Piezoelectric" signal

Area of Science:

• Materials Science
• Electrical Engineering
• Physics

Background:

• Polymer-based piezoelectric devices are key for wearable sensors and nanogenerators.
• Measured signals often combine piezoelectric and triboelectric effects, exaggerating results.
• Accurate assessment of piezoelectric performance is vital for device development.

Purpose of the Study:

• To propose a method for quantitatively distinguishing piezoelectric charge from hybrid signals.
• To differentiate triboelectric and piezoelectric contributions in poly(vinylidene fluoride) devices.
• To enable fair and correct evaluation of piezoelectric material performance.

Main Methods:

• Developing a technique to isolate piezoelectric charge from combined signals.
• Analyzing poly(vinylidene fluoride) devices to differentiate signal origins.
• Characterizing force and charge properties in the time domain for both effects.

Main Results:

• Successfully differentiated triboelectric and piezoelectric components in the hybrid signal.
• Identified distinct force and charge characteristics for each signal type.
• Demonstrated quantitative extraction of the true piezoelectric charge.

Conclusions:

• The proposed method effectively elucidates true piezoelectric performance in practical measurements.
• Accurate signal separation is crucial for fair evaluation of piezoelectric materials.
• This work advances the reliable development of piezoelectric devices.