Spectroscopic studies on ultra-thin films of indium tin oxide under electro-chemical modulation

Han Xue; Sergio B. Mendes

doi:10.1117/12.2000142

27 September 2012 Spectroscopic studies on ultra-thin films of indium tin oxide under electro-chemical modulation

Han Xue, Sergio B. Mendes

Author Affiliations +

Proceedings Volume 8459, Physical Chemistry of Interfaces and Nanomaterials XI; 845911 (2012) https://doi.org/10.1117/12.2000142
Event: SPIE NanoScience + Engineering, 2012, San Diego, California, United States

Abstract

Indium tin oxide (ITO) is one of the most used conductive transparent oxide (CTO). Its electrical and optical properties under different environments are crucial to several applications. In this study, single-mode, broadband, integrated optical waveguide (IOW) technique was used to investigate the spectroscopic properties of ultra-thin (~ 13 nm) ITO films under electrical potential modulation. Optical absorbance changes under cyclic voltammetry at various probing wavelengths were measured. Electric potential for minimum absorbance against wavelength was analyzed, and we observed a clear linear correlation between them. Understanding the mechanisms behind this unusual spectroscopic change under potential modulation may have an important impact on several technological applications of ITO.

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Han Xue and Sergio B. Mendes "Spectroscopic studies on ultra-thin films of indium tin oxide under electro-chemical modulation", Proc. SPIE 8459, Physical Chemistry of Interfaces and Nanomaterials XI, 845911 (27 September 2012); https://doi.org/10.1117/12.2000142

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KEYWORDS

Modulation

Transparency

Refractive index

Waveguides

Absorbance

Annealing

Oxides

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