Absorption structure and manufacturing method thereof

Abstract

The invention provides an absorption structure and a manufacturing method thereof, wherein the absorption structure is composed of a structural unit and a plurality of through holes arranged on the structural unit and is characterized in that the manufacturing method comprises the following steps: step 1: obtaining a size L of the structural unit; step 2: determining a restricted wave vector rangekc according to the size L; step 3: making the wave vector within the wavenumber range kc satisfy the condition that the structural factor is equal to 0; step 4: obtaining a distribution of the through holes, wherein the distribution of the through holes meets that the value of the structural potential function is the minimum in a molecular dynamics simulation. Compared with the prior art, the absorption structure has the advantages that the absorption structure can be used as a super-homogeneous absorption structure that is not sensitive to polarization state of incident light in a thin filmsolar cell; under a vertical incidence condition, the absorption structure can absorb as much as 67.8% of light in the solar wave band as a whole, which is 1.74 times of that of an unstructured and amorphous silicon thin plate, and can absorb more than 80% of light within a specific broad band, indicating a characteristic of high absorption in a broad band.

Description

technical field [0001] The invention relates to the field of photovoltaic technology development, and more specifically, relates to the design of a super-uniform absorption structure applied to the absorption layer of thin-film solar cells. Background technique [0002] As a new type of clean, non-polluting and inexhaustible new energy, solar energy has broad development and application prospects in photovoltaic power generation and other fields. At present, the solar cells that can be widely promoted in the market are silicon solar cells, but because the purification process of silicon is very complicated, the requirements for the quantity and quality of materials limit the improvement of cell efficiency, and the photoelectric conversion efficiency of cells is still relatively low. Thin-film solar cells significantly reduce the production cost of silicon because the thickness of the absorber layer is reduced to hundreds of microns, but at the expense of reducing the absorpt...

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Problems solved by technology

[0003] Aiming at the defects in the prior art, the object of the present invention is to propose an absorption layer that solves the problems of poor absorption effect, random structure design, and sensitivity to the polarization state and incident angle of incident light in the existing structure design of the absorption layer. Structure manufacturing method and absorbent structure

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