(FR2741194-A1)      A solar cell of polycrystalline silicon (alloy) has a light-receiving surface containing pit-like holes of 0.1-10 m depth and 0.1-10 m diameter with a depth to diameter ratio of greater than 1, the surface area of the holes occupying more than half the surface area of the silicon. Also claimed is a process for texturing a surface of p-type polycrystalline silicon (alloy) by partial chemical oxidation of the surface with a fluorine ion-containing oxidising solution to form a porous surface layer which is then dissolved to obtain the textured surface.    ADVANTAGE -   The solar cell has greater efficiency (e.g. 6.4% higher photovoltaic conversion yield and 5.4% higher short-circuit current) than conventional cells and the texturing process permits efficient and economic reduction of optical reflectivity and increase of effective absorption.    (JP9167850-A)      A solar cell of polycrystalline silicon (alloy) has a light-receiving surface containing pit-like holes of 0.1-10 m depth and 0.1-10 m diameter with a depth to diameter ratio of greater than 1, the surface area of the holes occupying more than half the surface area of the silicon. Also claimed is a process for texturing a surface of p-type polycrystalline silicon (alloy) by partial chemical oxidation of the surface with a fluorine ion-containing oxidising solution to form a porous surface layer which is then dissolved to obtain the textured surface.    ADVANTAGE -   The solar cell has greater efficiency (e.g. 6.4% higher photovoltaic conversion yield and 5.4% higher short-circuit current) than conventional cells and the texturing process permits efficient and economic reduction of optical reflectivity and increase of effective absorption.    (US5949123-A)      A solar cell of polycrystalline silicon (alloy) has a light-receiving surface containing pit-like holes of 0.1-10 m depth and 0.1-10 m diameter with a depth to diameter ratio of greater than 1, the surface area of the holes occupying more than half the surface area of the silicon. Also claimed is a process for texturing a surface of p-type polycrystalline silicon (alloy) by partial chemical oxidation of the surface with a fluorine ion-containing oxidising solution to form a porous surface layer which is then dissolved to obtain the textured surface.    ADVANTAGE -   The solar cell has greater efficiency (e.g. 6.4% higher photovoltaic conversion yield and 5.4% higher short-circuit current) than conventional cells and the texturing process permits efficient and economic reduction of optical reflectivity and increase of effective absorption.