The synthesis and opto-electrical chracteristics of Cadmium doped Tin oxide thin films by the Sol-Gel method

Year 2019, Volume: 2 Issue: 1, 18 - 22, 19.07.2019

Handan Aydin

Abstract

In this study,
undoped and Cd doped SnO thin films at different atomic rates (0, 2, 4 and 6%)
were synthesized by the Sol-Gel method. The changes in the opto-electrical
properties of the samples produced with Cd dopant were investigated by means of
the UV-VIS-NIR spectroscopy. The effect of Cd doping on the optical properties of SnO
films was investigated by spectrophotometric measurements. Optical constants
(refractive index, n, and absorption index, k) of the samples were obtained in
the wavelength range of 300-800 nm. Dispersion parameters were determined and
discussed according to the single oscillator model. The
optical band gaps of the samples were calculated using Tuac equation. It was
observed that Eg values of the samples increased from 3.57eV to 3.60 eV
depending on the Cd dopant. As a result of the investigations, it was determined that Cd
doping has significant effects on the optical properties of SnO films and the
produced samples can be used in transparent conductive electrode applications,
optoelectronic devices, and sensor production.

Keywords

Cd doped Tin-oxide, sol-gel, spin coating, optical properties, band gap

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