eng Ansari Education and Research Society Journal of Ultra Scientist of Physical Sciences April 2008 20 1 1 4 jusps-B 1352 article R. K. Tyagi 1 B. D. Tyagi 2 Pankaj Pathak 3 Physics Department, Govt. (P.G.) College, Khatima (Uttrakhand) - 262308 (INDIA) CEERI, Pilani - (Rajasthan) INDIA Physics Departmental, S.S.V., College, Hapur, Ghaziabad (U.P,.) 245101 (INDIA) <p style="text-align:justify">Porous silicon is obtained by electrochemical etching of single crystalline silicon with 48% hydrofluoric acid. In this work we calculate energy gap DE for different visible wavelengths in the white light spectrum by treating energy levels in the bands of porous silicon as Bohr levels. This emission of monochromatic visible wavelengths is related to porous density of porous silicon (p-si) material. These visible wavelengths are expected to be emitted from degenerate energy levels above band gap.<br /> &nbsp;</p> https://ultraphysicalsciences.org/paper/1352/ Porous Silicon (PS) Photoluminescence Electroluminescence Porosity Quantum Wires