Solar cell, its module and its manufacturing method

Abstract

Disclosed are a solar cell, a module of the solar cell, and a manufacture method of the solar cell. The solar cell comprises a substrate, a passivation layer, a convergency electrode, and multiple linear back electrodes. The substrate comprises a light receiving surface and a back surface which are opposite to each other, and a back surface electric field connecting part located at the back surface side. The convergency electrode is located on the back surface and comprises multiple segment-shaped conducting parts at intervals. The back surface electric field connecting part is located between at least two adjacent segment-shaped conducting parts. The multiple linear back electrodes correspondingly and respectively cover multiple linear openings of the passivation layer. The multiple linear back electrodes are only arranged at the multiple linear openings correspondingly instead of being applied in a whole surface so that the application amount of screen printing electrocondution slurry can be reduced effectively and the cell production cost can be lowered.

Description

technical field [0001] The invention relates to a solar cell, its module and its manufacturing method, in particular to a silicon crystal solar cell, its module and its manufacturing method. Background technique [0002] refer to figure 1 , figure 2 , the known silicon solar cell mainly includes: a substrate 91 with an opposite light-receiving surface 911 and a back surface 912, a front electrode 92 on the light-receiving surface 911, a plurality of local back surface electric fields on the back surface 912 (Local Back Surface Field, referred to as LBSF) 93 and a plurality of Al-Si alloy structures 90, a passivation layer 94 located on the back surface 912 and having a plurality of openings 941, a passivation layer 94 located on the passivation layer 94 and can pass through the multiple An opening 941 contacts the back electrode 95 of the back surface 912 and a plurality of bus electrodes 96 connected to the back electrode 95 . [0003] The passivation layer 94 is used t...

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Problems solved by technology

[0004] The back electrode 95 of the battery is formed by screen printing metal paste and sintered. However, since the back electrode 95 is coated on the back surface 912 of the substrate 91, the amount of metal paste is large and the production cost is high. Therefore, the structure and manufacturing method of known batteries need to be improved.

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