Abstract: A solar cell module includes a substrate, a plurality of solar cells arranged in a plane on the substrate, a connection member for electrically connecting the plurality of solar cells to each other to form a power generating circuit, and a single transparent cover sheet for covering the plurality of solar cells and the connection member.

Abstract: A solar cell includes a first semiconductor region of a P type, a second semiconductor region of an N type in contact with the first semiconductor region so as to form a PN junction therebetween, and a third semiconductor region of a P.sup.+ type in contact with both the first and second semiconductor regions and having a higher impurity concentration than that of the first semiconductor region.

Abstract: A P-type diffusion layer is formed on an N-type silicon semiconductor wafer to establish a P-N junction in a solar cell, the diffusion layer being exposed to radiation. A pair of electrodes are formed on the surfaces of the diffusion layer and the semiconductor wafer in a desired configuration in order to provide output of electric energy generated by the solar cell. The diffusion layer is formed in such a manner that the layer has a thickness of around 3 .mu.m at areas where the electrode is formed and has a thickness of around or below 0.5 .mu.m at regions on which the electrode is not formed. With such an arrangement, radiation having a wavelength of about or shorter than 400 m.mu.m can be used for performing optoelectric generation.