2019年第80回応用物理学会秋季学術講演会

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6 薄膜・表面 » 6.4 薄膜新材料

[18p-PA5-1~22] 6.4 薄膜新材料

2019年9月18日(水) 16:00 〜 18:00 PA5 (第一体育館)

16:00 〜 18:00

[18p-PA5-16] One-pot solvent free synthesis of BiOI films via oxidation of BiI3 in air

Anissa Adiwena Putri1,2、Amr Attia Abuelwafa1,3、Shinya Kato1、Naoki Kishi1、Tetsuo Soga1 (1.Nagoya Inst. of Tech.、2.Walisongo State Islamic Univ.、3.South Valley Univ.)

キーワード:BiOI, direct annealing, air oxidation

Bismuth oxyiodide (BiOI) is the promising bismuth-based materials which has been applied as photocatalyst in waste treatment. Since it has good absorption under visible spectral range, BiOI can be used as the component in photovoltaic devices. While BiOI powder could be obtained from direct annealing of BiI3, it is also possible to prepare the BiOI films by this BiI3 powder oxidation. The direct annealing of BiI3 is preferable for our BiOI preparation since it does need the solvent usage. From the vapor deposition, the deposited BiI3 in glass substrates could be obtained. Then, the deposited BiI3 was annealed at 350 oC for 1 h to result in the BiOI layer. To study the structural property, all films were characterized by X-Ray diffraction (XRD) and Raman spectrophotometer. To evaluate the optical character and its morphology, the analysis using UV-Visible spectrophotometer and FESEM were also required. The crystal planes (001); (002); (102); (110); (004); (200); and (122) were confirmed by its XRD patterns. However, only three basic crystal planes appeared in the annealed BiI3 for 45 min, namely (001); (102); and (110). We did not find the BiI3 residue and BiOI derivations peaks in our diffractogram. By the difference in the thickness and crystal planes composition, those BiOI films may show the different optical and photovoltaic properties. To sum up, the deposition time of BiI3 had the effect on the amount of the deposited BiOI onto glass substrates. Due to the different amount of the deposited material, the film thickness changed. It may also change other characters, like its optical and other behaviors.