Growth and optical studies of tungsten disulphide single crystals doped with gold

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• 作者：M.N. Nasruddin^a ; Mula Sigiro^b ; ^{mulasigiro@gmail.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Layered crystals ; Surface photovoltage spectroscopy ; Piezoreflectance
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：127
• 期：4
• 页码：1599-1602
• 全文大小：819 K

文摘

Tungsten disulphide single crystals doped with gold (WS₂:Au) have been grown by the chemical vapor transport method using iodine as a transporting agent. The structure of the materials was characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), and Raman measurements. The doping effects of the materials are characterized by surface photovoltage (SPV) and piezoreflectance (PzR) measurements. The SPV spectrum reveals an impurity level located below the A exciton. The direct band-edge excitonic transition energies for WS₂:Au show redshifts and the broadening parameters of the excitonic transition features increase due to impurity scattering.