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MWT and passivation combined crystal silicon solar cell and manufacturing method thereof

A technology of solar cells and manufacturing methods, applied in the direction of final product manufacturing, sustainable manufacturing/processing, circuits, etc., can solve problems such as low-cost mass-producible structures and preparation methods that have not yet appeared, and achieve the effect of being beneficial to removal

Inactive Publication Date: 2014-02-19
ALTUSVIA ENERGY TAICANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although many companies and research institutes at home and abroad are currently developing point-contact solar cells and MWT cells on the back of monocrystalline silicon, there is no low-cost mass-producible structure and preparation method that combines the two.

Method used

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  • MWT and passivation combined crystal silicon solar cell and manufacturing method thereof

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Embodiment

[0033] Embodiment: the structure of the crystalline silicon solar cell that the MWT of this embodiment combines with back passivation is as follows figure 1 As shown, it includes an antireflection film 1, a phosphorus diffusion layer 2, a P-type silicon substrate 3, an aluminum oxide film 4, a laminated protective film 5, and an aluminum printing layer 6 that are sequentially stacked. It is equipped with a silver electrode 7 for the filling hole, and a dielectric film is covered between the hole wall and the silver electrode 7 for the filling hole. A local aluminum back field contact 9 is formed through the lamination protection film 5 and the aluminum oxide film 4 and with the P-type silicon substrate 3 .

[0034] Using a 156mm P-type single crystal silicon wafer as the base material, the specific steps of the manufacturing method are as follows:

[0035] (1) Use a red laser to drill holes on the back of the silicon wafer, the pattern is a 4*4 matrix, the diameter of the hol...

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Abstract

The invention discloses an MWT and passivation combined crystal silicon solar cell and a manufacturing method thereof. The crystal silicon solar cell comprises a passivating film, a phosphorus diffusion layer, a P-type silicon substrate, an aluminum oxide film, a laminated protective film and an aluminum printing layer structure which are sequentially superposed, and a through-hole silver electrode penetrates the crystal silicon solar cell. The manufacturing method of the crystal silicon solar cell comprises the steps of drilling, flocking, diffusing, polishing, film growth, tapping, hole filling, printing, sintering and the like. The MWT and passivation combined crystal silicon solar cell has the advantages of being low in cost and capable of being produced in a mass mode.

Description

technical field [0001] The invention relates to a structure and a manufacturing method of a solar cell, in particular to a crystalline silicon solar cell combined with MWT and back passivation and a manufacturing method thereof. Background technique [0002] The industrial production of modern solar cells is developing towards high efficiency and low cost. The combination of MWT (Metal wrap through) technology and rear passivation (PERC) technology, as a representative of the development direction of high efficiency and low cost, has the following advantages: [0003] (1) Very low front shading: MWT technology leads the busbar to the back of the battery by drilling holes in the silicon wafer, thereby reducing the shading of the metal electrodes on the sun-facing side of the battery; [0004] (2) Excellent back reflector: Due to the existence of the dielectric film on the back of the battery, the internal back reflection increases from 65% of the conventional all-aluminum bac...

Claims

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Application Information

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IPC IPC(8): H01L31/0216H01L31/0224H01L31/18
CPCH01L31/02167H01L31/02245H01L31/02327H01L31/068H01L31/1804H01L31/1876Y02E10/547Y02P70/50
Inventor 夏正月高艳涛陈同银刘仁中董经兵张斌邢国强
Owner ALTUSVIA ENERGY TAICANG
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