VHF Plasma CVD Synthesis of Photochromic ZnO Nanoparticle

Hiroshi Kajiyama, Shin Kuboyama, Atsushi Otomo, Hiroki Uyama, Toshihiro Matsuura, Shuhei Inoue, Yukihiko Matsumura, Keiji Takata, Kentaro Tomita, Kiichiro Uchino

Research output: Contribution to journalArticle

Abstract

Photochromic (PC) ZnO nanoparticles are synthesized for the first time by using a VHF plasma enhanced CVD apparatus. The prepared ZnO film changes from transparent to PC state under UV irradiation; on being subjected to heat treatment, it changes back to transparent state. There is a threshold temperature for attaining the PC phase. The Debye-Waller factor of Zn atoms is specifically large for the PC ZnO. The ZnO nanoparticles contain carbon as impurity. The effects of C-O bonds on the ZnO crystal structure and density of states (DOS) are simulated based on density-functional theory. The results reveal that the crystal structure is slightly distorted and a sufficient DOS for PC light absorption is formed in the band gap.

Original languageEnglish
Pages (from-to)1573-1577
Number of pages5
JournalMRS Advances
Volume4
Issue number27
DOIs
Publication statusPublished - 2019

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)
  • Condensed Matter Physics

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  • Cite this

    Kajiyama, H., Kuboyama, S., Otomo, A., Uyama, H., Matsuura, T., Inoue, S., Matsumura, Y., Takata, K., Tomita, K., & Uchino, K. (2019). VHF Plasma CVD Synthesis of Photochromic ZnO Nanoparticle. MRS Advances, 4(27), 1573-1577. https://doi.org/10.1557/adv.2019.80