| 摘要 |
PURPOSE:To obtain a low cost electrode having the same efficiency as one in which Ag and Au are used by a method wherein paste having Ni as the main ingredient of conductive material is used, and said paste is applied to the electrode forming part of a silicon solar battery substrate whereon a P-N junction is formed. CONSTITUTION:A P type layer 2 is formed by diffusing trivalent impurities such as boron and the like on an N type silicon substrate 1. Then, paste layers 3 and 4 are applied on the surface of the N type layer 1 and the P type layer 2 respectively by performing a screen printing method and the like. The paste used here consists of nickel powder, glass frit powder, and an organic solvent, with which said powder is dispersed, are the main ingredients. Then, after the paste layers 3 and 4 have been dried up at the temperature range of 80-150 deg.C for 20min, a heat treatment is performed in a reducing gas atmosphere at 400-800 deg.C for 30min. As a result, an alloy layer of nickel in the paste and siliconin in the substrate is completed, thereby enabling to form excellent ohmic electrodes 3' and 4'. |
