CHEMICALLY DEPOSITED HETEROJUNCTION SOLAR CELLS Pb(1-x)Cd(x)S(n)/Si(p)

Abstract

The fimls of Pb (1-x) Cd (x) S have been prepared on glass substrates by chemical method. The optical study of transmission T(λ) and reflexion R(λ) spectra has enabled us to determine the compounds whose gap is close to 1.5 eV. The heterojunction is obtained by the chemical deposition of the Pb (1-x) Cd (x) S films grown on the p-type Silicon substrates (7 Ω cm). The preparation conditions of the ternary compound whose gap is 1.48 eV have been used to achieve the heterojunction Pb (1-x) Cd (x) S - n/Si - p , and we have studied the effect of thermal treatment on the prepared heterojunction. X-ray diffraction has been used to determine the variation of the crystalline parameter, the ratio of cadmium in the compound Pb (1-x) Cd (x) S and the dependence of the gap on the cadmium composition. C–V characteristics were examined to understand the average concentration of impurities in the compound Pb (1-x) Cd (x) S .