Presentation Information
[11p-E202-1][The 60th Young Scientist Presentation Award Speech] Optotriboelectric: Surface-Photovoltage-Assisted Enhancement of Triboelectric Output
〇Qingyang Zhou1, Masahiro Otsude1, Takashi Ikuno1 (1.Tokyo Univ. of Sci.)
Keywords:
Triboelectric nanogenerator,Surface photovoltage,Photoinduced
We propose an Optotriboelectric approach in which light is utilized not as an independent power source but as an external stimulus for controlling the electrostatic state of dielectric surfaces. A TiO2 nanoparticle-embedded PDMS composite film was employed as the triboelectric layer, and ultraviolet (UV) irradiation was used to induce a surface photovoltage (SPV). Surface-potential measurements revealed the formation of a stable negative surface potential under UV illumination, indicating photoinduced charge accumulation in the composite film. This photoinduced charge state was superimposed on the triboelectrically generated charges and effectively increased the surface charge density contributing to power generation. As a result, the output voltage of the triboelectric nanogenerator (TENG) increased from approximately 4.8 V to 9.1 V. The influence of semiconductor material selection on the Optotriboelectric effect and its underlying mechanism will also be discussed.