A solar cell structure

Abstract

The invention discloses a solar cell structure, comprising an upper electrode layer, a lower electrode layer and a ferroelectric material layer between the upper electrode layer and the lower electrode layer, wherein the lower electrode layer is arranged on the periphery of the upper electrode layer, and the lower electrode layer can completely or partially surround the projection of the upper electrode layer on the lower electrode layer, so that the electric field in the ferroelectric material layer is scattered and is not perpendicular to the surfaces of the upper and lower electrode layers. The magnetic field in the ferroelectric material layer of a common solar cell structure is changed from a situation that the magnetic field is uniformly scattered and is perpendicular to the surfaces of the upper and lower electrode layers to a situation that the magnetic field is scattered and is not perpendicular to the surfaces of the upper and lower electrode layers, so that the quantity of current carriers separated by the electric field is increased and the photovoltaic effect is finally enhanced.

Description

technical field [0001] The invention belongs to the field of solar cells, and in particular relates to a solar cell structure and a manufacturing method thereof. Background technique [0002] Such as figure 1 and figure 2 The structure of the common solar cell shown has a lower electrode layer 1 , a ferroelectric material layer 2 and an upper electrode layer 3 in sequence from bottom to top. The upper electrode layer 3 and the lower electrode layer 1 are respectively connected to external devices through wires. for figure 1 For example, the ferroelectric material layer is relatively thin, such as 500 nm, and the area of ​​the lower electrode layer is relatively large, such as a square with a side length of 1 cm, and a square with a side length of 200 μm for the upper electrode layer. At such a scale, after the ferroelectric material is polarized by an external electric field, a depolarization field will be generated between the upper and lower electrodes. Since the upp...

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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 lower electrode layer in the ordinary solar cell structure is changed, the lower electrode layer is arranged on the periphery of the upper electrode layer, and the lower electrode layer can be Completely surround or partially surround the projection of the upper electrode layer on the lower electrode layer, so that the distribution of the electric field in the ferroelectric material layer is no longer uniform, perpendicular to the upper and lower electrode layers, but divergent, not perpendicular to the surface of the upper and lower electrode layers , so as to increase the number of carriers separated by the electric field, and finally achieve the effect of enhancing the photovoltaic effect

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