Structural and optical properties of ZnO microrods as fast and efficient UV scintillator materials

Authors

Hernanie T. Salazar National Institute of Physics, University of the Philippines Diliman
Alexandra Santos Putungan National Institute of Physics, University of the Philippines Diliman
Arnel A. Salvador National Institute of Physics, University of the Philippines Diliman
Roland V. Sarmago National Institute of Physics, University of the Philippines Diliman
Melvin John F. Empizo Institute of Laser Engineering, Osaka University
Kohei Yamanoi Institute of Laser Engineering, Osaka University
Ren Arita Institute of Laser Engineering, Osaka University
Toshihiko Shimizu Institute of Laser Engineering, Osaka University
Nobuhiko Sarukura Institute of Laser Engineering, Osaka University

Abstract

Aqueous chemical grown zinc oxide (ZnO) microrods are found to be crystalline, uniform and well-faceted in terms of structure and morphology. From photoluminescence spectroscopy, these microrods interestingly exhibit ultraviolet (UV) near-band-edge emission at 392 nm (3.16 eV) without any visible or defect-related emission. The UV emission also intensifies with increasing excitation energy. Spectral narrowing is not observed indicating the non-existence of lasing nor stimulated emission from these structures. Having fast luminescence lifetimes less than 100 ps, these ZnO microrods then hold a promise as potential candidates for fast and efficient scintillator materials.

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Issue

2015: Proceedings of the 33rd Samahang Pisika ng Pilipinas Physics Congress

Article ID

SPP-2015-5B-07

Section

Condensed Matter Physics and Materials Science

Published

2015-06-03

How to Cite

[1]

HT Salazar, AS Putungan, AA Salvador, RV Sarmago, MJF Empizo, K Yamanoi, R Arita, T Shimizu, and N Sarukura, Structural and optical properties of ZnO microrods as fast and efficient UV scintillator materials, Proceedings of the Samahang Pisika ng Pilipinas 33, SPP-2015-5B-07 (2015). URL: https://proceedings.spp-online.org/article/view/1109.