Effect of Long Selenization Time on Co Films under a Low Temperature of 300 °C to Synthesize a Nanostructure CoSe2 and Optical Properties

International Conference on Nanomaterials and Biomaterials 2017

材料科学;物理学;生物科学

Wu, Po-Feng^1 ; Shi, Jen-Bin^2 ; Cheng, Bo-Ci^2 ; Wu, Cheng-Han^2 ; Lee, Hsuan-Wei^2 ; Lin, Hsien-Sheng^2 ; Cheng, Fu-Chou^3 ; Chen, Kuan-Ping^2

College of General Education, Hung-Kuang University, No. 1018, Taiwan Boulevard, Shalu District, Taichung City

4330, Taiwan^1

Engineering, Feng Chia University, No.100, Wenhwa Rd, Seatwen, Taichung

40724, Taiwan^2

Department of Medical Research, Taichung Veterans General Hospital, No. 160, Taichung Harbor Road, Taichung

40705, Taiwan^3

关键词: Co films;    Crystallinities;    Direct band gap;    Low temperatures;    Non-toxic;    Selenization;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/350/1/012004/pdf
DOI  :  10.1088/1757-899X/350/1/012004

来源: IOP

【 摘 要 】

This work investigates a simple and non-toxic method to transform pre-deposited amorphous Co film into CoSe2 films at a fixed, low temperature of 300 °C. Single CoSe2-phase films having good crystallinity were obtained at a selenisation time24 hours. A nanostructure CoSe2 having two different nano-morphological layers was observed. The CoSe2 films (72 hours) observed a large absorption and a direct band gap.