Surface Engineered MoS₂-Based Novel Vertical Triboelectric Nanogenerator (V-TENG) for Wireless Information Processing

Area of Science:

• Materials Science
• Energy Harvesting
• Nanotechnology

Background:

• Self-sustaining mechanical energy harvesting is crucial for energy-efficient systems and wearable technology.
• Triboelectric nanogenerators (TENGs) convert ambient mechanical energy into electrical power for electronics.
• Surface and structural engineering can enhance TENG performance by optimizing charge transfer.

Purpose of the Study:

• To boost TENG energy harvesting through dielectric engineering and surface modification.
• To explore the use of a Polyethylene Terephthalate (PET) transition layer alongside kapton.
• To investigate the impact of aromatic carboxylic acid modification on molybdenum sulfide (MoS2) surfaces.

Main Methods:

• Incorporated a PET transition layer for enhanced charge storage.
• Modified the MoS2 surface with aromatic carboxylic acids, specifically [4,4 omino-Oxybis (Benzoic acid)].
• Fabricated and tested a vertical TENG device with the engineered layers.

Main Results:

• The "PET-Kapton@4,4 omino-MoS2" TENG showed increased output open-circuit voltage (VOC) from 6 to 30 V and short-circuit current (ISC) from 65 to 202 nA.
• Achieved a maximum power density of 399 mW m⁻² after surface modification and transition layer insertion.
• Demonstrated the TENG's capability to power LEDs, a calculator, and generate Morse code, which was wirelessly transmitted via Wi-Fi.

Conclusions:

• Dielectric and surface engineering significantly enhances TENG performance.
• The developed TENG offers a scalable solution for powering small electronic devices and wireless data transmission.
• This approach paves the way for more efficient and durable self-sustaining energy harvesting systems.