Solar cell element and solar cell module

摘要

A solar cell element comprising a semiconductor substrate including a first surface to receive light, and a second surface provided on a back side of the first surface, a plurality of base collector electrodes provided on the second surface of the semiconductor substrate, a plurality of collector electrodes provided on the plurality of base collector electrodes, a connector electrode to electrically connect the collector electrodes adjacent to each other across a region between the plurality of base collector electrodes among the plurality of collector electrodes. A first extracting electrode provided between the plurality of base collector electrodes, and a second extracting electrode electrically connected to at least one of the plurality of collector electrodes.

主权项

1. A solar cell element comprising:
a semiconductor substrate including a first surface to receive light, and a second surface provided on a back side of the first surface; a plurality of base collector electrodes provided on the second surface of the semiconductor substrate; a plurality of collector electrodes, at least one collector electrode from amongst the plurality being placed on each of said base collector electrodes in a thickness direction of said substrate, such that each collector electrode is electrically connected to said base collector electrode on which said collector electrode is placed; a connector electrode provided to said second surface and electrically connected to at least one of plurality of said collector electrodes; a first extracting electrode provided between the plurality of said base collector electrodes; and a second extracting electrode provided to said second surface and electrically connected to said connector electrode, wherein a first electrode comprises a light-receiving surface electrode provided on the first surface of the semiconductor substrate, the first extracting electrode, and a conduction part provided so as to penetrate the semiconductor substrate, and electrically connecting the light-receiving surface electrode to the first extracting electrode, and a second electrode having a polarity different from that of the first electrode comprises the plurality of base collector electrodes, the plurality of collector electrodes, the connector electrode, and the second extracting electrode, wherein each electrode of the plurality of base collector electrodes and each electrode of the plurality of collector electrodes comprises a conductive material, and wherein the connector electrode, the first extracting electrode, the second extracting electrode, the first electrode and the second electrode each comprise a conductive material, and wherein each of the plurality of base collector electrodes, the plurality of collector electrodes, the connector electrode, and the second extracting electrode is spaced apart from the first extracting electrode and is not connected to the first extracting electrode.