Solar cell with refractor

Abstract

The invention provides a solar cell with a refractor. The solar cell comprises a cell piece matrix and a pointing grid line arranged on the cell piece matrix, wherein the pointing grid line is bonded and fixed with a refractor for refracting rays emitted to the grid line to a non-shield naked region on the cell piece matrix through a bonding layer; the refractor is formed by forming an inverted triangle groove in a colorless and transparent material matrix, and the triangle groove is arranged along an extending direction of the grid line; a light refraction principle is utilized, incident rays on the pointing grid line of the front of the cell can change the path of the incident light before arriving at the pointing grid line under the action of the refractor, so that the incident light is refracted to a region which is not shielded by the grid line on the front of the cell, thus the shield loss of the incident light is avoided, and the conversion efficiency of the cell is improved.

Description

technical field [0001] The invention relates to a solar cell, in particular to a solar cell with a refractor. Background technique [0002] Solar cells are photovoltaic devices made of one or several photoelectric quantum effects based on the specific morphology and structure of related materials, such as silicon materials, gallium arsenide, tellurium sulfide and other semiconductor materials or other organic or inorganic materials. compound material. Solar cells are generally made of these host materials through a special process to form a structure that can realize photoelectric conversion and combined with certain metallization techniques. [0003] The main processing technology of crystalline silicon solar cells mainly forms a functional structure that can absorb light with maximum efficiency and enable photons to generate corresponding hole-electron pairs after entering the matrix material, and then pass through the metallization process to generate electrons. Collect...

AI Technical Summary

Problems solved by technology

At present, the width of the screen-printed front electrode finger lines is generally 50-100 microns, and due to the technical bottleneck of the screen printing technology itself, it is difficult to further reduce the width of the finger lines, which inevitably results in a loss of about 5%. frontal shading loss

[0005] In order to further reduce the shading loss caused by the front electrodes, many new technologies have been developed in the industry, such as reducing the width of the finger grid lines by means of electroplating or inkjet printing, so that the width of the front finger grid lines can reach 40 microns Even narrower, but even so, the shading loss of the finger grid line is still relatively large and cannot be completely eliminated

At the same time, these technologies are also relatively expensive, and it is difficult to bring benefits to the entire industry

[0006] In addition, there is also a back contact technology based on N-type crystalline silicon cells. Using this technology, the positive and negative electrodes of the solar cell are made on the back of the cell, thereby completely eliminating the shading loss of the front electrode, but this technology needs to be adopted. More and more sophisticated processing equipment and manufacturing techniques will lead to more expensive production costs, and it is difficult to introduce and apply them to the production lines currently in general commercial production

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