Luminescence Properties of ZnO Nanowhisker Fabricated by Electric Current Heating Method

• NEZAKI Dai

  Department of Electrical Engineering, Nagaoka University of Technology

• OKAMOTO Tomoichiro

  Department of Electrical Engineering, Nagaoka University of Technology

• TAKATA Masasuke

  Department of Electrical Engineering, Nagaoka University of Technology

• OGAWA Kenji

  Taiheiyo Cement Corporation

Abstract

Zinc oxide nanowhiskers were fabricated by an electric current heating (ECH) method using porous ZnO ceramics under Ar and Ar-0.1%H₂ atmosphere. Nanowhiskers had a size variation with a diameter of a few tens nm to sub-μm and a length of a few μm to a few hundreds μm. Photoluminescence of the nanowhiskers was investigated at room temperature. Clear near band-edge emissions at ultraviolet region and extremely weak deep-level emissions at visible regions were observed from the nanowhiskers, reflecting high-crystalline quality. The intensity of ultraviolet emissions from the nanowhiskers grown under Ar-0.1%H₂ was higher than that from the nanowhiskers grown under Ar. Therefore, ZnO whiskers with high efficiency UV emissions were successfully fabricated by the ECH method using porous ZnO ceramics and ambient atmosphere containing H₂ gas. The results imply the high potential of the ECH method for one-dimensional ZnO nanostructures.

Journal

• Journal of the Ceramic Society of Japan, Supplement

  Journal of the Ceramic Society of Japan, Supplement 112 (0), S958-S960, 2004

  The Ceramic Society of Japan

Keywords

• ZnO
• Electric current heating method
• Nanowhisker
• Photoluminescence
• Ultraviolet emission
• Green emission
• Exciton

Details

• CRID: 1390282680502557696
• NII Article ID: 130004610353
• DOI: 10.14852/jcersjsuppl.112.0.s958.0
• ISSN: 13492756
• Text Lang: en
• Data Source:
  • JaLC
  • CiNii Articles
• Abstract License Flag: Disallowed