VETRO SMERIGLIATO,PROCEDIMENTO PER PRODURRE VETRO SMERIGLIATO,CELLA FOTOVOLTAICA INCORPORANTE UNA LASTRA DI VETRO,E PROCEDIMENTO PER LA FABBRICAZIONE DI TALE CELLA

摘要

Glass is matted by surface of overlapping etch pits of polyhedral of such small area that at least 30% of normally incident visible light is diffusely transmitted; total luminous transmittance is at least TT-10 and pref. at least TT-5, where TT is transmittance before etching. Prepn. is by etching with soln. of F-salt to form F-contg. crystals which are removed to expose pits. Glass is pref. etched on one face only. Photo-voltaic cell is coated with (1) conductive layer which is light transmi-ting, (2) photo-active layer and (3) 2nd conductive layer. Pref. layers are (1) doped tin oxide, (2) amorphous Si and (3) light reflecting material which is esp. Al; photo-active material (2) is pref. blue sensitive layer which is over-coated with red sensitive layer.