Author(s)

M. O. Sid-Ahmed^1*, M. H. Bilal², S. G. Babiker³

¹Department of Physics, Omdurman Ahlia University, Omdurman, Sudan.
²Department of Physics, Faculty of Education, University of Algadarif, Gadaref, Sudan.
³Department of Physics, Red Sea University, Port Sudan, Sudan.

Rigorous coupled-wave analysis has been used to design a glazing for hot climates. The designed glazing is relatively simple and it transmits most of the visible light and reflects most of the infrared radiation. It does not need any external source of energy to control its optical properties. It consists of ITO and four periodic pairs of Si/SiO₂, deposited on a glass sheet. The optimum thicknesses of ITO, Si and SiO₂ are 0.1 μm, 0.15 and 0.4 μm, respectively. The glazing acts as an optically selective filter. It transmits about 80% of the visible light and reflects almost all the infrared radiation. The performance of the glazing is almost independent of the angle of incidence of solar radiation. This makes it suitable for all hours of the day. The fabrication of the glazing and the testing have been performed at the laboratories of the Faculty of Science, University of Witwatersrand, South Africa. Magnetron sputtering technique has been used for the fabrication. ITO, Si and SiO₂ have been used as sputtering targets. The experimental results are almost identical to the simulation results.

Smart Windows, Electrochromic Windows, Thermochromic Windows, Hot Climates

Sid-Ahmed, M. , Bilal, M. and Babiker, S. (2017) A Spectrally Selective Window for Hot Climates. Journal of Electronics Cooling and Thermal Control, 7, 33-44. doi: 10.4236/jectc.2017.72004.