NOVELTY - A polycrystalline film of silicon comprises silicon grains with an aspect ratio, d/t, of more than 1:1, where d is the grain diameter and t is grain thickness.    USE - For forming an electronic device, e.g. monolithically integrated solar cell.    ADVANTAGE - Manufacturing cost is reduced by forming polycrystalline film of silicon having silicon grains with high aspect ratio that allows the formation of thin, electronically effective active layers for devices such as solar cells. Monolithically integrated solar cell is easy and inexpensive to manufacture on a mass-production scale. The solar module exhibits superior reliability and performance.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following:    (A) a method of making a thin polycrystalline film of silicon comprising (i) forming a layer of polycrystalline silicon on a substrate using a thin-film deposition technique; and (ii) subjecting the layer to a treatment to form silicon crystals with an aspect ratio, d/t of more than 1:1, where d is grain diameter and t is grain thickness;    (B) an electronic device comprising (a) substrate; (b) layer of polycrystalline silicon formed on the substrate; and (c) electrodes formed in electrical communication with silicon layer;    (C) a method of making an electronic device comprising (i), (ii); and (iii) forming electrodes in electrical communication with polycrystalline silicon layer;    (D) a solar cell comprising (a) an electrically insulating substrate; (b) first and second ohmic contacts carried by substrate, the second being spaced from the first; and (c) layer of polycrystalline silicon; and    (E) a method of making a solar cell comprising (a) forming first and second ohmic contacts on an electrically insulating substrate; (b) forming a layer of polycrystalline silicon, including p-n junction, in electronic communication with the ohmic contacts; and (c) subjecting the polycrystalline layer to treatment to form silicon crystals.    DESCRIPTION OF DRAWING(S) - The figure shows a cross-sectional view of a monolithically integrated solar cell.    Substrate (1)    First and second ohmic contact layers (2, 8)    P-N junction (7)