Author:
Zeng Le-Gui ,Liu Fa-Min ,Zhong Wen-Wu ,Ding Peng ,Cai Lu-Gang ,Zhou Chuan-Cang ,
Abstract
The Nb/SnO2 composite thin films were successfully synthesized by sol-gel spin-coating method on glass substrate. The structures and properties of Nb/SnO2 composite thin films were characterized by X-ray diffraction (XRD), scanning electron microscopey (SEM), ultraviolet visible near-infrared spectrophotometry and four-probe method. The effects of Nb doping on structure and optical-electrical properties of the Nb/SnO2 composite thin films were researched. The results indicate that a tetragonal rutile structure is retained when the Nb content is less than 0.99at%, and the nano-particles are distributed homogeneously in the thin films and their size can be controlled in the range of 5—7 nm. The resistivity of Nb/SnO2 composite thin films decreases and then increases when the Nb content is less than 0.99at%, and reaches a very low value of 9.49×10-2 Ω ·cm at 0.37at% Nb. In the range of 400—700 nm visible region, the transmittance of Nb/SnO2 composite thin films is up to 90% when the Nb content is less than 0.99at%, and the optical band gap of Nb/SnO2 composite thin films are in the range of 3.9—4.1 eV. The visible light transmittance of Nb/SnO2 composite thin films significantly reduce at 1.23at% Nb.
Publisher
Acta Physica Sinica, Chinese Physical Society and Institute of Physics, Chinese Academy of Sciences
Subject
General Physics and Astronomy
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