Room-temperature optical emission properties of hydrothermal grown zinc oxide nanostructures

Authors

  • Erick John Carlo D Solibet National Institute of Physics, University of the Philippines Diliman
  • Melvin John Fernandez Empizo Institute of Laser Engineering, Osaka University
  • Maria Cecilia Moralde Angub Materials Science and Engineering Program, College of Science, University of the Philippines Diliman
  • Christopher Jude Tan Vergara Materials Science and Engineering Program, College of Science, University of the Philippines Diliman
  • Horace Andrew Fernandez Husay National Institute of Physics, University of the Philippines Diliman, Diliman, Quezon City 1101, Philippines
  • Verdad Canila Agulto Institute of Laser Engineering, Osaka University
  • Kohei Yamanoi Institute of Laser Engineering, Osaka University
  • Toshihiko Shimizu Institute of Laser Engineering, Osaka University
  • Elmer Surat Estacio National Institute of Physics, University of the Philippines Diliman
  • Arnel Angud Salvador National Institute of Physics, University of the Philippines Diliman
  • Nobuhiko Sarukura Institute of Laser Engineering, Osaka University
  • Armando Soriano Somintac National Institute of Physics, University of the Philippines Diliman

Abstract

We report on the room-temperature optical emissions of hydrothermal-grown zinc oxide (ZnO) nanostructures. The nanostructures were fabricated on seeded silicon (Si) substrates by hydrothermal growth method using different zinc acetate dihydrate [Zn(CH3COO)ยท2H2O, ZnAc] concentrations. Regardless of the ZnAc concentration, all nanostructures exhibit well-defined hexagonal facets and intense near-band-edge ultraviolet (UV) emissions. However, increasing the ZnAc concentration leads ZnO nanostructures which exhibit longer emission lifetimes and a secondary red-shifted UV emission around 392 nm. These changes in the nanostructures' UV emission properties are attributed to the multiple excitation/absorption and emission processes of coalescent structures and/or structures sharing common sides or boundaries. Our results suggest that for UV scintillator applications, this phenomenon in ZnO nanostructures can be reduced by using lower (< 100 mM) ZnAc concentrations during hydrothermal growth.

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Published

2020-10-19

How to Cite

[1]
EJCD Solibet, MJF Empizo, MCM Angub, CJT Vergara, HAF Husay, VC Agulto, K Yamanoi, T Shimizu, ES Estacio, AA Salvador, N Sarukura, and AS Somintac, Room-temperature optical emission properties of hydrothermal grown zinc oxide nanostructures, Proceedings of the Samahang Pisika ng Pilipinas 38, SPP-2020-2C-02 (2020). URL: https://proceedings.spp-online.org/article/view/SPP-2020-2C-02.

Issue

Section

Condensed Matter and Materials Science