Kedar Johnson1,2,Clara Jackson2,Elycia Wright2,Selena Coye2,Indika Matara Kankanamge2,Michael Williams2
Morehouse College1,Clark Atlanta University2
Kedar Johnson1,2,Clara Jackson2,Elycia Wright2,Selena Coye2,Indika Matara Kankanamge2,Michael Williams2
Morehouse College1,Clark Atlanta University2
Seeding promoters have been utilized to facilitate the growth of transition metal dichalcogenides via chemical vapor deposition (CVD). The choice of seeding promoter can significantly impact the resulting film's properties, including its crystallization, growth area, phase, and composition. Our study will investigate the effects of different seeding promoters on tungsten disulfide (WS<sub>2</sub>) growth on sapphire, which is known to be challenging to control in terms of layer area, quality, and thickness. The seeding promoters we will be using in our study are sodium chloride (NaCl), zinc oxide/zinc sulfate (ZnO/ZnSO<sub>4</sub>), and sodium sulfate (NaSO<sub>4</sub>). We will analyze the effect of each seeding promoter on the properties of WS<sub>2</sub> to determine their correlation and identify the best promoter for future growth. To analyze the properties of WS<sub>2</sub>films, we will use confocal laser microscopy, photoluminescence spectroscopy (PL), Raman spectroscopy, Fourier transform infrared microscopy (FTIR), and x-ray photoemission spectroscopy (XPS). Our focus will be on studying these films' photoluminescence, absorption, layer thickness, impurity, optical phonon modes, and bandgap.