NOVELTY - A photovoltaic module (300) comprises: solar cells linearly arranged on substrate (102), and containing two solar cells each having back-electrode (104), semiconductor junction and transparent conductive layer (110), where a layer of semiconductor junction is made by depositing Group IIIA and VIA elements on back-electrode, depositing Group IB and VIA elements on substrate/optional layer, monitoring first deposition state during second depositing by making first measurements of an indicia of the first state, and terminating/attenuating second depositing at a first critical control point.    USE - As photovoltaic module (claimed); and in the fabrication of monolithically integrated solar cells of photovoltaic module.    ADVANTAGE - The photovoltaic module includes monolithically integrated solar cells that have the advantage of reducing current carrying requirements of the integrated solar cells and minimizing material costs.    DETAILED DESCRIPTION - A photovoltaic module (300) comprises substrate (102); and solar cells linearly arranged on the substrate and containing first and second solar cells, each comprising back-electrode (104) disposed on the substrate, semiconductor junction disposed on the back-electrode, and transparent conductive layer (110) disposed on the semiconductor junction, where the transparent conductive layer of the first solar cell in the solar cells is in serial electrical communication with the back-electrode of the second solar cell in the solar cells, and where a layer of the semiconductor junction is constructed by depositing, during first period of time, at least one Group IIIA element and at least one Group VIA element on the back-electrode, depositing, during second period of time, at least one Group IB element and the group VIA element, on the substrate or on the optional layer that is optionally disposed on the substrate, where at least a portion of the Group IB element combines with the Group VIA element to form IB2VIA composition on the back-electrode, monitoring first deposition state, during the depositing second step, by making first measurements of an indicia of the first deposition state; and terminating or attenuating the depositing second step at a first critical control point based on a function of the first measurements of the indicia of the first deposition state. The layer of the semiconductor junction layer is further constructed by depositing, during third period of time, at least one additional Group IIIA element and the Group VIA element, monitoring second deposition state, during the depositing fifth step, by making second measurements of indicia of the second deposition state, and terminating or attenuating the depositing fifth step at a second critical control point based on a function of the second measurements of the indicia of the second deposition state.    DESCRIPTION OF DRAWING(S) - The figure shows solar cell manufactured with the photovoltaic module.    Substrate (102)    Back-electrode (104)    Transparent conductive layer (110)    Photovoltaic module (300)    Optional intrinsic layer (415)