Study of the effects of soiling on PV devices using the spin-coating technique in accelerated indoor exposures

•We propose a procedure for indoor soiling studies by using spin coating technique.•Dust samples were collected from PV modules installed in the Atacama Desert.•Homogeneous dust deposition was obtained within 25 s using spin coating technique.•Physicochemical characteristics of material allowed understanding the cementation.•As dust amount increased, light attenuation in the UV range became more significant.