Optical properties of undoped and Al-doped ZnO thin films deposited via spray pyrolysis technique

  • Erick John Carlo De Guzman Solibet National Institute of Physics, University of the Philippines Diliman
  • Raymund Curioso Veloz Materials Science and Engineering Program, University of the Philippines Diliman
  • Horace Andrew Fernandez Husay National Institute of Physics, University of the Philippines Diliman
  • Melvin John F. Empizo Institute of Laser Engineering, Osaka University
  • Keisuke Kawano Institute of Laser Engineering, Osaka University
  • Kohei Yamanoi Institute of Laser Engineering, Osaka University
  • Nobuhiko Sarukura 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
  • Armando Soriano Somintac National Institute of Physics, University of the Philippines Diliman

Abstract

We report the optical properties of undoped and aluminum (Al)-doped zinc oxide (ZnO) thin films to realize their potential scintillator applications. Hexagonal wurtzite ZnO thin films with varying Al-doping concentrations were successfully fabricated using spray pyrolysis technique on seeded glass substrates. Both undoped and Al-doped thin films exhibit up to 75% transmittances in the visible region and 20 to 30 ps emissions around 381 nm. Increasing the Al-doping, however, results in a slight reduction of the films' visible transmittances by 3 to 15% and an increase of the green emissions by one order of magnitude. At the moment, these observed effects of Al-doping on the optical properties of ZnO thin films are attributed to the presence of Al-related impurities. Nevertheless, our results provide vital insights on the suitability of Al-doped ZnO films as fast ultraviolet (UV) scintillators for molecular dynamics (MD) investigations.

Published
2018-05-28
How to Cite
[1]
E. J. C. Solibet, R. Veloz, H. A. Husay, M. J. Empizo, K. Kawano, K. Yamanoi, N. Sarukura, E. Estacio, A. Salvador, and A. Somintac. Optical properties of undoped and Al-doped ZnO thin films deposited via spray pyrolysis technique, Proceedings of the Samahang Pisika ng Pilipinas 36, SPP-2018-PA-32 (2018). URL: https://paperview.spp-online.org/proceedings/article/view/SPP-2018-PA-32.
Section
Poster Session A (Materials Science, Instrumentation, and Photonics)