A solar cell structure

Abstract

The invention discloses a solar cell structure which comprises a substrate, wherein a ferroelectric material grows on the substrate, a first electrode and a second electrode grow on the ferroelectric material, the first electrode is arranged at the center of the ferroelectric material, the second electrode is arranged at the edge of the ferroelectric material, the second electrode at least partially encloses the first electrode, and a distance is reserved between the first electrode and the second electrode. A circular demising hole is formed in the second electrode, the first electrode is arranged at the center of the demising hole, and the first electrode is circular. An electric field in the ferroelectric material is radially diverged from the first electrode to the second electrode. Compared with a common solar cell structure that the electric field is uniformly distributed and is vertical to the two electrodes, the solar cell structure disclosed by the invention has the advantages that the electric field is radially diverged from the first electrode to the second electrode, a voltage enclosed by the electric field is remarkably increased, so that a number of carriers separated by the electric field is increased, and finally the effect of enhancing a photovoltaic effect is achieved.

Description

technical field [0001] The invention belongs to the field of solar cells, and in particular relates to a solar cell structure. Background technique [0002] Such as figure 1 and figure 2 In the common solar cell structure shown, a ferroelectric material a2 is grown on the substrate a1, a first electrode a3 and a second electrode a4 are grown on the ferroelectric material a2, and the first electrode a3 and the second electrode a4 are arranged on the ferroelectric On the left and right sides of the material a2, the areas of the first electrode a3 and the second electrode a4 are relatively small, for example, a square with a side length of 200 μm˜600 μm. In such a scale, after the ferroelectric material is polarized by an external electric field, a depolarization field will be generated between the first electrode a3 and the second electrode a4. Since the side lengths of the first electrode a3 and the second electrode a4 are generally much larger than the distance between t...

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problem of low photoelectric conversion efficiency of existing ordinary solar cells, the present invention provides a solar cell structure in which the first electrode and the second electrode arranged on the left and right in the ordinary solar cell structure are changed to the first electrode and the second electrode arranged in the center of the ferroelectric material. An electrode and a second electrode arranged on the edge of the ferroelectric material, and the second electrode at least partially surrounds the first electrode, leaving a distance between the first electrode and the second electrode

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