Novel black bismuth oxide (Bi2O3) with enhanced photocurrent generation, produced by high-pressure torsion straining

Ikuro Fujita, Parisa Edalati, Qing Wang, Motonori Watanabe, Makoto Arita, Shinji Munetoh, Tatsumi Ishihara, Kaveh Edalati

研究成果: Contribution to journalArticle査読

1 被引用数 (Scopus)

抄録

Bismuth oxide (Bi2O3), a yellow semiconductor ceramic, is considered as an advanced photoactive energy material, but its activity still needs further improvement for practical applications. In this study, black Bi2O3 with nanocrystalline structure and large fraction of oxygen vacancies is synthesized by mechanical straining via the high-pressure torsion (HPT) method. The black oxide exhibits enhanced light absorbance under both UV and visible lights. It shows a bipolar photocurrent behavior with up to six times higher photocurrent density compared with the unprocessed yellow Bi2O3. This study shows the high potential of severely-strained black Bi2O3 for photovoltaic, photoconductivity and photocatalytic applications.

本文言語英語
ページ(範囲)366-370
ページ数5
ジャーナルScripta Materialia
187
DOI
出版ステータス出版済み - 10 2020

All Science Journal Classification (ASJC) codes

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学
  • 金属および合金

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