Femtosecond pulse ablation assisted mg-zno nanoparticles for uv-only emission

Anubhab Sahoo, Muralidhar Miryala, Tejendra Dixit, Alicja Klimkowicz, Bellarmine Francis, Masato Murakami, Mamidanna Sri Ramachandra Rao, Sivarama Krishnan

研究成果: Article

抜粋

The need for improved UV emitting luminescent materials underscored by applications in optical communications, sterilization and medical technologies is often addressed by wide bandgap semiconducting oxides. Among these, the Mg-doped ZnO system is of particular interest as it offers the opportunity to tune the UV emission by engineering its bandgap via doping control. However, both the doped system and its pristine congener, ZnO, suffer from being highly prone to parasitic defect level emissions, compromising their efficiency as light emitters in the ultraviolet region. Here, employing the process of femtosecond pulsed laser ablation in a liquid (fs-PLAL), we demonstrate the systematic control of enhanced UV-only emission in Mg-doped ZnO nanoparticles using both photoluminescence and cathodoluminescence spectroscopies. The ratio of luminescence intensities corresponding to near band edge emission to defect level emission was found to be six-times higher in Mg-doped ZnO nanoparticles as compared to pristine ZnO. Insights from UV-visible absorption and Raman analysis also reaffirm this defect suppression. This work provides a simple and effective single-step methodology to achieve UV-emission and mitigation of defect emissions in the Mg-doped ZnO system. This is a significant step forward in its deployment for UV emitting optoelectronic devices.

元の言語English
記事番号1326
ページ(範囲)1-11
ページ数11
ジャーナルNanomaterials
10
発行部数7
DOI
出版物ステータスPublished - 2020 7

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Materials Science(all)

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    Sahoo, A., Miryala, M., Dixit, T., Klimkowicz, A., Francis, B., Murakami, M., Rao, M. S. R., & Krishnan, S. (2020). Femtosecond pulse ablation assisted mg-zno nanoparticles for uv-only emission. Nanomaterials, 10(7), 1-11. [1326]. https://doi.org/10.3390/nano10071326