[19p-PA6-1~28] 3.12 Nanoscale optical science and near-field optics

▲ [19p-PA6-6] Quality evaluation of WS₂ monolayer with Raman scattering

〇(D)Byeong Geun Jeong¹, Chanwoo Lee^1,2, Sung Hyuk Kim¹, Dong Hyun Kim¹, Mun Seok Jeong^1,2 (1.Sungkyunkwan Univ., 2.Inst. for Basic Science)

Keywords:WS2, Confocal Raman Scattering, Tip enhanced Raman Scattering

Two-dimensional transition metal dichalcogenides(TMDs) are known to have remarkable optical and electrical properties which makes them be promising materials for optoelectronic and nanoelectronic devices. The performance of TMDs is expected to be easily affected by the defect density. However, defect-related Raman studies of TMDs are rarely done. In the case of tungsten disulfide(WS₂), recently, a study of the defect-related Raman scattering like D mode of graphene has been reported. Here, we controlled the density of vacancies in monolayer WS₂ and identified the relationship between the amount of vacancy and Raman mode of WS₂. The quantifying of the vacancy through D mode of WS2 can be utilized to characterize the quality of monolayer WS₂