| 摘要 |
PROBLEM TO BE SOLVED: To provide a solar battery cell superior in power generation efficiency and productivity in the form range of an area where few carriers can be diffused by specifying the total area of contact parts and covering the surface of a semiconductor substrate except for the contact parts by means of impurity diffused layers having a conductive types opposite to that of the semiconductor substrate. SOLUTION: The battery has a form in which the largest diameter of the semiconductor substrate 1 contributed to photoelectric conversion is smaller than the diffusion length of the few carriers in the semiconductor, and the ratio of the maximum diameter and the minimum diameter of the semiconductor substrate 1 does not, exceed 10. At least one pair of positive and negative contact parts taking out electric energy exist and the total area of the contact parts is less than one thousands of the surface area of the semiconductor substrate 1. The surface of the semiconductor substrate 1 except for the contact parts is covered by the impurity diffused layers 21 having the conductive types opposite to the semiconductor substrate The length of the longest diagonal in the semiconductor substrate 1 is made shorter than the diffusion length of the few carriers in the semiconductor. Thus, the satisfactory solar battery can be obtained. |
