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Optical Analysis of Ag-NPs Containing Methyl Ammonium Lead Tri-Iodide Thin Films

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Mosiori C. O., Njoroge W. K., Ochoo L. O.
Path of Science
|
2017
|
vol. 3
|
issue 9
2007-2015
EN
Methyl ammonium lead tri-iodide hybrid thin films were grown using solution technique. They were doped with silver nano-particles at different concentrations at concentrations of 0.05, 0.06, 0.07, 0.08, and 0.09 mM. Their reflectance and transmittance were recorded in the wavelength range 300–900 using UV-Vis double - beam spectrophotometer. Using these measurements, other optical parameters were simulated using scout software. The effect of silver nanoparticles was investigated. Results revealed that the thin films had highest transmittance of about 79 % as their band gap varied from 1.921–1.832 eV. Electrical conductivity varied from 1.4–1.6×105 S cm–1 while optical conductivity varied in the range of 0.3–0.6×1010 sec-1. They had a significantly low refractive index, suitable for optical applications within the range of 1.6–1.8. The extinction coefficient varied in the range as 1.0–1.7×10-5 while the absorption coefficient varied varies in the range of 2.1-4.2 cm- 1. It was concluded that the thin films were suitable for photonic device applications.
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