A comparative study of ZnO thin film and nanorod samples prepared by wet-chemical methods

  • 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
  • Ma. Cecilia Moralde Angub 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 Fernandez Empizo Institute of Laser Engineering, Osaka University
  • Keisuke Kawano Institute of Laser Engineering, Osaka University
  • Toshihiko Shimizu Institute of Laser Engineering, Osaka University
  • Nobuhiko Sarukura Institute of Laser Engineering, Osaka University
  • 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 present a comparative study of the optical properties of zinc oxide (ZnO) thin film and nanorods prepared by wet-chemical methods. Crystalline thin film and nanorod samples were successfully fabricated on seeded substrates using spray pyrolysis technique and hydrothermal growth method, respectively. The thin film exhibits flake-like grains, while the nanorods exhibit well-defined hexagonal cross sections. Although both thin film and nanorods show similar optical band gaps of 3.26 eV, intense near-band-edge UV emissions at 380 nm, and broad and weak green emissions around 530 to 560 nm, the thin film exhibits higher visible transparency of 66 to 89% and faster ultraviolet (UV) emission lifetime of 30 ps. These results reveal important insights on selecting and designing ZnO-based optical sensors for future biological applications.

Published
2018-05-24
How to Cite
[1]
E. J. C. Solibet, R. Veloz, M. C. Angub, H. A. Husay, M. J. Empizo, K. Kawano, T. Shimizu, N. Sarukura, A. Salvador, and A. Somintac. A comparative study of ZnO thin film and nanorod samples prepared by wet-chemical methods, Proceedings of the Samahang Pisika ng Pilipinas 36, SPP-2018-PA-07 (2018). URL: https://paperview.spp-online.org/proceedings/article/view/SPP-2018-PA-07.
Section
Poster Session A (Materials Science, Instrumentation, and Photonics)