期刊
MATERIALS RESEARCH BULLETIN
卷 93, 期 -, 页码 47-55出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2017.04.037
关键词
OFT; Gas sensing; Photoluminescence; CCTO/CTO composites; Screen-printing technique
资金
- Brazilian agency: FAPESP [2013/07296-2, 2016/07476-9]
- Brazilian agency: CNPq [573636/2008-7]
- Brazilian agency: CAPES/PROCAD
Combined experimental and theoretical investigations were conducted on the electronic structure, as well as the optical and gas-sensing properties of mixed-phase CaCu3Ti4O12/CaTiO3 (CCTO/CTO) composites, which were synthesized by a solid-state reaction using various milling durations. Our results revealed that these CCTO/CTO composites have a broad photoluminescence (PL) emission band located at 450 nm, which is strongly influenced by the milling process duration. Scanning electron microscopy images confirmed that the use of longer milling durations favored the formation of pores and increased the active surface area of the CCTO/CTO thick films. The thick films were prepared using the screen printing technique, and hence, could be structured for gas-sensing applications. Our theoretical findings may further elucidate the electronic structure associated with the interfacial band alignment (type I straddling gap) of the CCTO/CTO composite systems. (C) 2017 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据