Highly-transparent Perovskite Thin Films Obtained by a Wet Chemical Processing Method

• 作者: Rouholah Ashiri
• 来源期刊: 非金属材料科学(英文)
• 学科: 工学
• 关键词: BARIUM titatate High TRANSMITTANCE Nanothin films Sol-gel DIP-COATING
• 年，卷（期）: 2019,（1）
• 页码范围: 22-27
• 页数: 6页
• 分类号: TD

摘要

Barium titanate thin films are widely used for making the multilayer capacitors. High transmittance barium titanate thin films are rarely reported in the literature. This work reports a new sol-gel routine for obtaining high transmittance BaTiO3 (BTO) thin films, then the optical responses of the products are evaluated. Experimental results show that the topography and morphology of BTO coating are improved using our established method and thus the better optical responses have BTO obtained. It is seen that the optical losses of BTO thin coating are lower in contrast to similar works. Results also indicate that increment of the calcination temperature reduces the thin films transparency and thickness. Other results show that an increase in the withdrawal rate of the substrate from the sol results in an increase in the BTO coating thickness and a decrease in transparency of the BTO coating. The prepared highly transparent nanothin films are amorphous due to the maximum temperature experienced and are as thin as 30 nm. We think that obtained BTO thin coatings are desired for optical and electro-optical applications.