Visible-Light Photocurrent in Nanostructured High-Pressure TiO2-II (Columbite) Phase

研究成果: Contribution to journalArticle査読

2 被引用数 (Scopus)

抄録

Titanium oxide (TiO2), with the anatase and rutile structures, has been widely studied for photovoltaic and solar cell applications, but its main drawback is large bandgap, which limits its activity to the UV light region. In this study, a high-pressure TiO2-II (columbite) phase, which has already been suggested to have low bandgap with downward-shifted Fermi level, is stabilized by the high-pressure torsion (HPT) method and its photovoltaic activity is examined. The TiO2-II formation by HPT processing leads to photocurrent generation under visible light, while the visible-light photocurrent is enhanced further after the recovery of oxygen vacancies by thermal annealing.

本文言語英語
ページ(範囲)13930-13935
ページ数6
ジャーナルJournal of Physical Chemistry C
124
25
DOI
出版ステータス出版済み - 6 25 2020

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • エネルギー(全般)
  • 物理化学および理論化学
  • 表面、皮膜および薄膜

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