Nano-ZnO film preparation at low temperature and the optical indices calculation

Autor: Liang Sun, Ting Wang, Shun-pin Li, Xichang Bao, Ailing Yang, Yu-jin Wang, Renqiang Yang
Rok vydání: 2014
Předmět:
Zdroj: Optoelectronics Letters. 10:216-220
ISSN: 1993-5013
1673-1905
DOI: 10.1007/s11801-014-4034-6
Popis: The refractive indices of thin films based on Kramers-Kronig theory are corrected. And the correction theory is used to determine the optical indices of nano-ZnO thin films prepared by low temperature sol-gel method. The calculated results indicate that in the visible (Vis) range, the refractive indices of nano-ZnO thin films exhibit a slight abnormal dispersion, while in the ultraviolet (UV) region, the refractive indices increase with wavelengths increasing (normal dispersion). But the refractive indices show complex change near the absorption edge. The maximum refractive index (1.95) of nano-ZnO thin films within UV range at low temperature annealing is much lower than that of the films annealed at high temperature. The absorption and refractive indices are closely related to the defects in nano-ZnO thin films.
Databáze: OpenAIRE