| 摘要 |
<p>An OECO solar cell (1) of a first mode using a silicon single crystal substrate having grooves, wherein the minimum groove depth h of the groove (2) having the maximum depth determined in a cross section perpendicular to the longitudinal direction of the groove (2) by observation satisfies the inequality h ≥ W1tanυwhere υ is the angle between the line connecting the lowest part of a formed electrode (6) in the direction of the thickness of the substrate and the top part of the inner side face of the groove (2) where no electrode is formed and the reference line perpendicular to the direction of the thickness of the substrate and W1 is the width of the groove (2) defined as the distance between the edges of the opening of the groove (2). A method for manufacturing a solar cell of a second mode comprising a p-type silicon single crystal substrate (3) cut from a silicon single crystal ingot and having plural grooves in its first major surface, wherein the grooves are formed by the edge of the grooving blade which is projected by a predetermined height from the flat substrate feed surface of a machining table, bringing the first major surface of the p-type silicon single crystal substrate into close contact with the substrate feed surface, moving this substrate toward the rotating grooving blade along the substrate feed surface. An electrode for taking out the output is provided on one inner face of each thus formed groove in the direction of the width of the groove.</p> |
