[15p-K503-1~15] 6.1 Ferroelectric thin films

2:00 PM - 2:15 PM JST(5:00 AM - 5:15 AM UTC)

[15p-K503-5] Theoretical analysis of negative charge accumulation mechanism and detection method in charged material potassium ion electret with SiO₅ structure.

〇(M2)Taiki Kirikoshi¹, Yoshiki Ohata¹, Masaki Araidai^1,2, Takuma Ishiguro³, Hiroyuki Mitsuya³, Hiroshi Toshiyoshi⁴, Gen Hashiguchi⁵, Kenji Shiraishi^1,2 (1.Graduate School of Engineering, Nagoya Univ., 2.IMaSS, Nagoya Univ., 3.Saginomiya Seisakusho INC., 4.IIS, University of Tokyo., 5.Graduate School of Engineering, Shizuoka Univ.)

Keywords:

electret,vibration power generation,energy harvesting

Potassium ion electrets (KiE) have attracted attention as a material for stable vibration power generation. KiE is a negatively charged material, and we have discovered through theoretical calculations that the origin of this negative charge accumulation may be the SiO₅ structure formed by five-coordinated Si, and have confirmed the possibility of the existence of the SiO₅ structure many times through theoretical calculations. However, the SiO₅ structure is not easily observed experimentally. In this study, we explore the characteristic properties of the SiO₅ structure using first-principles calculations and discuss the confirmation of the SiO₅ structure through experiments.