Patent ID: 7807494

Claim:
A method of producing a chalcogenide semiconductor layer of the ABC 2 type, comprising the steps of: sequentially depositing two metallic precursor layers from elements A and B; chalcogenizing the deposited layers; simultaneously irradiating the layers with light from at least one source of coherent light; detecting measuring scattered light reflected from the layers; evaluating the measured scattered light as a function of time; and assigning precursor transformation of the compound AB 2 to A 11 B 9 to a first point; assigning surface chalcogenation of the formed layer in which formation of the phase ABC 2 has been initiated to a second point; assigning the complete formation of ABC 2 in the case of a precursor layer without excess A or the complete phase separation of ABC 2 and the foreign phase A x C y in the case of a precursor layer with excess A to a third point; and assigning the transformation of the foreign phase A x C y to foreign phase A C to a fourth point.