High-Performance Piezoelectric Nanogenerators via Imprinted Sol-Gel BaTiO3 Nanopillar Array
Sung-Ho Shin1, Seong-Young Choi2, Min Hyung Lee2
1Department of Electrical Engineering, Chungnam National University , Daejeon 34134, Korea.
ACS Applied Materials & Interfaces
|November 14, 2017
Summary
High-performance piezoelectric nanogenerators (PENGs) using nanoimprinted barium titanate (BTO) show enhanced voltage and current density. This simple, reproducible method yields uniform output for advanced electronic devices.
Area of Science:
- Materials Science
- Nanotechnology
- Energy Harvesting
Background:
- Piezoelectric nanogenerators (PENGs) are crucial for energy harvesting.
- Improving PENG performance and uniformity is an ongoing challenge.
- Sol-gel processed barium titanate (BTO) offers piezoelectric properties.
Purpose of the Study:
- To develop high-performance PENGs using nanoimprinted BTO nanopillars.
- To enhance output voltage and current density of PENGs.
- To achieve uniform device characteristics over a large area.
Main Methods:
- Fabrication of sol-gel BTO nanopillar arrays using nanoimprinting.
- Polarization of BTO nanopillars via high electric field and ultraviolet treatment.
- Characterization of PENG performance, including output voltage and current density.
Main Results:
- Achieved significantly enhanced output voltage (∼10 V) and current density (∼1.2 μA cm⁻²).
- Demonstrated uniform output characteristics across the entire device area.
- Compared favorably against PENGs fabricated on flat surfaces.
Conclusions:
- The nanoimprinting and polarization method is effective for high-performance sol-gel BTO PENGs.
- This approach offers a simple, reliable, and reproducible pathway for advanced piezoelectric devices.
- The developed PENGs show promise for various electronic applications.
