Synthesis of WS2 Ultrathin Films by Magnetron Sputtering Followed by Sulfurization in a Confined Space

被引:2
|
作者
Sava, Florinel [1 ]
Simandan, Iosif-Daniel [1 ]
Buruiana, Angel-Theodor [1 ]
Bocirnea, Amelia Elena [1 ]
El Khouja, Outman [1 ]
Tite, Teddy [1 ]
Zaki, Mohamed Yasssine [1 ]
Mihai, Claudia [1 ]
Velea, Alin [1 ]
机构
[1] Natl Inst Mat Phys, Atomistilor 405A, Magurele 077125, Romania
来源
SURFACES | 2024年 / 7卷 / 01期
关键词
thin film synthesis; tungsten disulfide (WS2); physical vapor deposition; sulfurization; LATTICE-DYNAMICS; TRANSITION; LAYER;
D O I
10.3390/surfaces7010008
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
In the quest for advanced materials suitable for next-generation electronic and optoelectronic applications, tungsten disulfide (WS2) ultrathin films have emerged as promising candidates due to their unique properties. However, obtaining WS2 directly on the desired substrate, eliminating the need for transfer, which produces additional defects, poses many challenges. This paper aims to explore the synthesis of WS2 ultrathin films via physical vapor deposition (PVD) followed by sulfurization in a confined space, addressing the challenge of film formation for practical applications. Precursor layers of tungsten and WS2 were deposited by RF magnetron sputtering. Subsequent sulfurization treatments were conducted in a small, closed, graphite box to produce WS2 films. The physical and chemical properties of these precursor and sulfurized layers were thoroughly characterized using techniques such as X-ray reflectometry (XRR), X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). The findings reveal notable distinctions in film thickness, structural orientation, and chemical composition, attributable to the different precursor used. Particularly, the sulfurized layers from the tungsten precursor exhibited a preferred orientation of WS2 crystallites with their (00L) planes parallel to the substrate surface, along with a deviation from parallelism in a small angular range. This study highlights the necessity of precise control over deposition and sulfurization parameters to tailor the properties of WS2 films for specific technological applications.
引用
收藏
页码:108 / 119
页数:12
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