Honors College Thesis

 

Optical Characterization of Transparent Conductive Thin Films Public Deposited

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https://ir.library.oregonstate.edu/concern/honors_college_theses/5q47rv18d

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  • The optical characterization of transparent conductive thin films is demonstrated. The basics of transparency and conductivity, as they relate to transparent conductor research, are explained. A functional model of the reflectance and transmittance of a sample film, including interference fringes, is derived from the Fresnel electric field amplitude coefficients. The wavelength-dependent refractive index is determined by analysis of the interference fringes. Two methods for determining the absorption coefficient spectrum have been shown and compared. The absorption coefficient spectrum is used to determine the magnitude and the direct/indirect nature of the energy gap of the material. The significance of the diffuse spectral components of both transmittance and reflectance, with respect to analyzing the energy gap, is also demonstrated.
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