エハラ　タカシ   Takashi Ehara   惠原　貴志    所属   石巻専修大学  人間学部    職種   教授
言語種別	英語
発行・発表の年月	2016/02
形態種別	研究論文（学術雑誌）
査読	査読あり
標題	Preparation of CuYO2 Thin Films by Sol-Gel Method Using Copper Acetate and Yttrium Acetate as Metal Sources
執筆形態	単著
掲載誌名	Thin Film Technology and Applications, Scientific research publishing
巻・号・頁	4,pp.24-28
総ページ数	5
概要	Delafossite structured p-type wide bandgap semiconductor, CuYO2 thin films were prepared on SiO2 substrate by sol-gel method using copper (II) acetate and yttrium (III) acetate as source materials. The films preparation process was studied by varying annealing temperature after the preparation of gel films by spin coating, followed by thermal annealing at higher temperature. In the present work, one step annealing directly from Cu-Y-gel under nitrogen flow was used. X-ray diffraction (XRD) revealed that the film annealed at 800 ̊C is significantly c-axis oriented, shows only (002) and (004) peaks at 15.6 ̊ and 31.5 ̊, respectively. The optical bandgap of 3.7 - 3.8 eV is estimated by (αhν)2 plot which is higher than previous works. In addition, the films with highly c-axis orientation showed photoluminescence (PL) at room temperature with very broad peak at 2.3 eV. The films annealed at different temperature showed different structural properties.
DOI	http://dx.doi.org/10.4236/msce.2016.41005