Combining triboelectric nanogenerator with piezoelectric effect for optimizing Schottky barrier height modulation

Area of Science:

• Materials Science
• Electrical Engineering
• Nanotechnology

Background:

• Schottky-contacted sensors offer high sensitivity and fast response.
• Optimizing Schottky barrier height (SBH) is crucial for sensor performance, as excessively high or low SBH leads to poor output or sensitivity.
• Current methods for SBH tuning are limited.

Purpose of the Study:

• To propose a simple and effective method for tuning SBH in Schottky-contacted sensors.
• To investigate the synergistic effect of triboelectric generator (TENG) and piezotronic effect on SBH.
• To enhance the sensitivity and response time of Schottky-contact sensors.

Main Methods:

• Utilized a triboelectric generator (TENG) to generate voltage pulses for lowering SBH.
• Applied the piezotronic effect in conjunction with TENG treatment for synergistic SBH modulation.
• Quantified the changes in SBH and its recovery time under different treatment conditions.

Main Results:

• TENG treatment effectively lowered SBH, which gradually recovered over time.
• A synergistic effect between TENG and piezotronic effect significantly enhanced SBH reduction (3.8 to 12.8 times increase).
• Piezotronic effect drastically reduced the recovery time of TENG-lowered SBH from 1.5 hours to 40 seconds.

Conclusions:

• Demonstrated a flexible and feasible method for tuning SBH using TENG and piezotronic effects.
• The proposed method effectively improves the sensitivity of Schottky-contact sensors and sensing systems.
• This approach holds significant potential for advancing Schottky-contacted electronic devices and their applications.