Applied Solar Energy. Vol. 60, No. 6, Pages 829-834, 2025

R. A. Muminov^{a, b}, V. G. Dyskin^{a, c}, O. F. Tukfatullin^a^,*, B. N. Butunbaev^b, and K. A. Djumamuratov^a

^aResearch Institute of Semiconductor Physics and Microelectronics, National University of Uzbekistan, Tashkent, 100057 Uzbekistan

^bPhysical-Technical Institute, Academy of Sciences of the Republic of Uzbekistan, Tashkent, 100084 Uzbekistan

^cInstitute of Material Science, Academy of Sciences of the Republic of Uzbekistan, Tashkent, 100084 Uzbekistan

Abstract— To study the influence of optical constants of the polluting film on the efficiency of the photovoltaic module, a fractal model, and a complex medium model are proposed. The fractal dimension of the dust film is determined using images of the surface of the photovoltaic module and solar collector. It is shown that up to the percolation threshold, the calculations of optical constants according to the fractal model and the complex medium model differ by less than 1%. In the process of sedimentation of non-absorbing dust particles on the surface of the photovoltaic module, a clearing effect is possible: an increase in the transmittance of the glass.

Keywords: dust film, complex medium, fractal, reflectivity, transmittance, antireflective coating, solar cell

Study of the Effect of Optical Constants of Dust Film on the Efficiency of Photovoltaic Modules