Requirements and applications of accurate modeling of the optical transmission of transparent conducting coatings
Por:
Juarez-Garcia, Benito, Gonzalez-Gutierrez, Jesus, Judith Rivera-Medina, Martha, Garcia-Valenzuela, Augusto, Carlos Alonso-Huitron, Juan
Publicada:
1 jul 2019
Resumen:
A comprehensive model for the optical transmission is constructed and
used to investigate the requirements for fitting accurately the
experimental data of the optical transmittance at normal incidence of
transparent conducting coatings of ZnO:Al deposited on glass substrates
by ultrasonic spray pyrolysis. The model takes into account the Urbach
tail absorption edge at the low wavelength region, the contribution of
free carrier concentration to the weak absorption in the visible and
near-infrared ranges, and the effect of scattering of light originated
by the surface roughness of the films. The carrier concentration of the
ZnO:Al films was measured experimentally by the Hall effect and
dc-electrical conductivity measurements in the Van der Paw
configuration. It is shown that all mentioned physical effects must be
included in order to fit accurately the transmittance spectrum in the
VIS-NIR spectral window. The full expression for the optical
transmittance was used for choosing the optimal thickness of these films
as transparent conductive contacts and the calculation of the figure of
merit. (C) 2019 Optical Society of America
Filiaciones:
Juarez-Garcia, Benito:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Apartado Postal 70-360, Coyoacan 04510, Mexico
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Apartado Postal 70-360, Coyoacán, Distrito Federal 04510, Mexico
Gonzalez-Gutierrez, Jesus:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Apartado Postal 70-360, Coyoacan 04510, Mexico
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Apartado Postal 70-360, Coyoacán, Distrito Federal 04510, Mexico
Judith Rivera-Medina, Martha:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Apartado Postal 70-360, Coyoacan 04510, Mexico
Garcia-Valenzuela, Augusto:
Univ Nacl Autonoma Mexico, Inst Ciencias Aplicadas & Tecnol, Apartado Postal 70-186, Coyoacan 04510, Mexico
Instituto de Ciencias Aplicadas y Tecnología, Universidad Nacional Autónoma de México, Apartado Postal 70-186, Coyoacán, Distrito Federal 04510, Mexico
Carlos Alonso-Huitron, Juan:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Apartado Postal 70-360, Coyoacan 04510, Mexico
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