Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8044188 | Vacuum | 2018 | 5 Pages |
Abstract
Nanorod-structured ZnO (NR-ZnO) films were formed on glass substrates by thermal treatment of Zn acetate films in a closed-type tube furnace. The formation mechanism of the NR-ZnO films is proposed as follows: the volatile Zn acetate was vaporized from the top region of the Zn acetate films; the mixture of ZnO and Zn acetate groups in the intermediate region acted as a seed layer; and ZnO NRs were grown in the intermediate region via the vapor-solid process of the volatile groups. The as-formed NR-ZnO films exhibited a wurtzite crystal structure with strong c-axis orientation. The optical bandgap of the film was â¼3.27â¯eV, and photoluminescence emissions centered at 3.10, 2.98, and 2.81â¯eV were observed. The diffuse and specular transmittance values of the film were â¼95% and 59% at 550â¯nm, respectively. This difference originated from the structure of the NRs, which increased the light path length in the films.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Surfaces, Coatings and Films
Authors
Hong Tak Kim, Sung-Youp Lee, Young-Soo Sohn,