the pingroject is aimed at develop a process for fabrication of reproducible, stable silicon solar cells with high efficiency. a cheap and simple technology should substitute the present one without deterioration of the cell performance. the process here developed has used a spin-on doping, belt furnace instead of a quartz furnace tube, serigraphy instead of photolitography and surface treatment with a special edge protection techniques instead of various unstable methods for pn-transition isolating. the cell area has been enlarged from 5 cm sup 2 to 20 cm sup 2 and a procedure for p sup + nn sup + cells and n sup + pp sup + cells is developed. the best textured p sup + nn sup + had jsub(sc) = ma/cm sup 2 , vsub(oc) = 603 mv, ff = 0.78, itasub(am) sub 1 = 11.8. typical values for n sup + pp sup + cells inclusive ar layer was jsub(sc)= 23.9 ma/cm sup 2 , vsub(oc) = 592 mv, ff = 0.77, itasub(am) sub 1 = 11.0. a solar cell panel with 6 n sup + pp sup + cells gave isub(sc) = 440 ma, vsub(oc) - 3.5 v commercial monocrystalline solar cells are now generally of n sup + pp sup + type and have coefficient of performance from 12 to 15 while cell area is varying from 20 to 80 cm sup 2 . (era citation 11: 025465)