| 摘要 |
PURPOSE:To decrease light reflected from the surface of a solar cell and the solar cell in current collection resistance by a method wherein a large number of recesses are provided to the photodetective surface of a substrate, and a photodetective surface conductive layer is formed covering the surfaces of the recesses concerned. CONSTITUTION:Straight-line grooves 21 are formed on the photodetective faces of a cast substrate 11, and a large number of straight-ling grooves 22 having the same depth and width as those of the grooves 21 are formed at a constant interval vertical to the grooves 21. A photodetective face finger electrode 61 serving as a part of the photodetective face electrode is formed through printing and burning of Ag paste so as to be nearly filled into each of the grooves 22, and a photodetective face bus bar electrode 62 serving as a part of the photodetective face electrode the same as the finger electrode 61 is formed. By this setup, a part between an N<+>-type conductive layer 3 and the photodetective face finger electrode 61 can be lessened in current collection resistance. Light reflected outside of an element can be decreased in volume, and a solar cell can be improved in photoelectric conversion efficiency. |
