Optical properties analysis of the new (C9H14N)3BiCl6 compound by UV-visible measurements

In this report, an investigation of the optical properties of the (C9H14N)(3)BiCl6 hybrid compound by UV-Visible spectroscopy was detailed. The measurements were taken at room temperature in the range 200 to 2400 nm. The optical direct band-gap E-g, determined by means of reflectance data, by absorbance data or by Tauc's method, was evaluated at (3.391 +/- 0.009) eV, (3.409 +/- 0.009) eV and (3.422 +/- 0.102) eV, respectively. Furthermore, the estimated Urbach energy (290 +/- 7) meV proves the high disordered system. The dependence of optical constants such as the extinction coefficient k and the optical conductivity on the incident wavelength was analyzed. Besides, the skin depth shows that this sample has a screen effect for UV radiation. The refractive index, estimated around 1.52 in the visible domain, submits to the Cauchy relation. The dielectric study portrays the low values of the imaginary part of the complex dielectric constant. These losses are mainly in the bulk rather than the surface of the material. Based on the Wemple Di-Domenico model, the dispersion parameters E-0 and E-d relative to the (C9H14N)(3)BiCl6 sample were calculated. These encouraging results prompt us to propose this compound as a basic material for optoelectronic devices.

Automated summary

This study investigated the optical properties of the (C9H14N)(3)BiCl6 hybrid compound through UV-Visible spectroscopy, revealing its band gap energy and reflectance characteristics that make it a suitable material for optoelectronic devices.