Blue-shifted and picosecond amplified UV emission from aqueous chemical grown ZnO microrods

Creator

Melvin John F. Empizo, Osaka University
Kohei Yamanoi, Osaka University
Alexandra B. Santos-Putungan, University of the Philippines Los Banos
Ren Arita, Osaka University
Yuki Minami, Osaka University
Mui Viet Luong, Osaka University
Toshihiko Shimizu, Osaka University
Elmer S. Estacio, University of the Philippines Diliman
Armando S. Somintac, University of the Philippines Diliman

Issue Date

10-2015

Abstract

Room-temperature amplified spontaneous emission (ASE) has been observed from aqueous chemical grown zinc oxide (ZnO) microrods. The well-faceted microrods have only a single narrow ultraviolet (UV) emission at 390 nm (3.2 eV) with average lifetimes as fast as 85-100 ps. The characteristic ASE also exhibits blue-shifted peaks and shortened lifetimes. At present, the peak shifting and the lifetime shortening are attributed to the band filling and photo-induced screening effects and to the nonradiative relaxation process, respectively. Results indicate that the ZnO microrods have good structural and optical quality which leads to their suitable use for optoelectronic applications.

Source or Periodical Title

Optical Materials

ISSN

0925-3467

Volume

48

Page

179-184

Document Type

Article

Physical Description

illustrations, graphs

Language

English

Subject

II-VI semiconductor, Microrods, Photoluminescence, Solution growth, ZnO

Recommended Citation

Empizo, M.J.F., Yamanoi, K., Santos-Putungan, A.B., Arita, R., Minami, Y., Luong, M.V., Shimizu, T., Estacio, E.S., Somintac, A.S., Salvador, A.A., Sarmago, R.V., Sarukura, N. (2015). Blue-shifted and picosecond amplified UV emission from aqueous chemical grown ZnO microrods. Optical Materials, 48, 179-184. https://doi.org/10.1016/j.optmat.2015.07.041.

Identifier

https://doi.org/10.1016/j.optmat.2015.07.041.

Digital Copy

yes