| 초록 |
Output performance of triboelectric devices critically depends on surface charge density on the dielectric materials. The dielectric constant (ε) of materials is known to greatly affect the surface charge density. Fluorinated polymers have superior electron affinity, leading to negative triboelectric materials. However, increasing ε is greatly limited for the pure polymers. Herein, we show that interfacial polarization in bilayer polymer films, consisting of PDMS coated with triboelectric materials, significantly enhance the ε of films, resulting in significant enhancement of triboelectric performances compared to hard single-layer films, which is the first report to introduce interfacial polarization for the enhancement of triboelectric output performance. For proof-of-concept, we demonstrate a temperature sensitive triboelectric sensor and a vibration-based triboelectric nanogenerator. |
