TECHNOLOGY FOCUS - CERAMICS AND GLASS - Preferred Components: The glass substrate comprises a soda-lime-silica glass including (wt.%) silica (SiO2) (67-75); sodium oxide (Na2O) (10-20); calcium oxide (CaO) (5-15); magnesium oxide (MgO) (0-7); alumina (Al2O3) (0-5); potassium oxide (K2O) (0-5); lithium oxide (Li2O) (0-1.5); and barium oxide (BaO) (0-1).    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Coating: The anti-reflection coating additionally comprises an overcoat layer containing an oxide of silicon provided directly on and contacting the layer.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Method: The curing occurs at 100-150 degrees C for up to 2 minutes. The heat treating occurs at 600-750 degrees C for up to 5 minutes. Preferred Components: The first and second solvent is n-propanol. The catalyst is an acid (preferably hydrochloric acid). The colloidal silica comprises methyl ethyl ketone. The silica sol gel comprises more than one organic additive. The organic additive is an organic compound having at least one aliphatic or cyclic organic compounds selected from keto group, pyrrolidone, acrylamide and acrylate (preferably acetyl acetone, polyvinyl pyrrolidone, 1-methyl 2-pyrrolidone, N,N'-dimethylacrylamide, ethyl acrylate, triethanolamine and 2,4 pentanedione; especially acetyl acetone, polyvinyl pyrrolidone). The organic additive makes up 5-40 (preferably 10-30, especially 15-25)wt.% of the silica sol gel. The silica sol gel comprises (wt.%): acetyl acetone (10-30), polyvinyl pyrrolidone (10-30). EXAMPLE - A silica sol was prepared as follows. A polymeric component of silica was prepared by mixing n-propanol (64 wt.%), glycycloxypropyltrimethoxysilane (24 wt.%), water (7 wt.%) and hydrochloric acid (5 wt.%) for 24 hours. The coating solution was prepared by using (wt.%) the polymeric solution (21), colloidal silica (7) in methyl ethyl ketone and n-propanol (72). This was stirred for 2 hours to give silica sol. Then N,N-dimethylacrylamide (16 wt.%) was mixed with silica sol (84 wt.%), and stirred for 5 minutes. The silica coating was fabricated using spin coating method with 1000 revolutions per minute (rpm) for 18 seconds. The coating was cured at 130 degrees C for 1 minute, then heat treated in furnace at 625 degrees C for 3 and a half minutes. The obtained coating showed 2.6% increase in transmission; and 3.3% increase in power (W/m2).