Solar cell having back surface field structures and manufacturing method thereof

A technology for solar cells and manufacturing methods, which is applied in the directions of final product manufacturing, sustainable manufacturing/processing, circuits, etc., can solve the problems of reduced conversion efficiency, structural damage of the dielectric layer 12, affecting the quality and function of the dielectric layer 12, and the like, Achieve the effect of avoiding damage and improving conversion efficiency
CN102832263BInactive Publication Date: 2015-01-14MOTECH INDUSTRIES
6 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
MOTECH INDUSTRIES
Publication Date
2015-01-14
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a solar cell having back surface field structures and a manufacturing method of the solar cell. The cell comprises a wafer, a dielectric layer, multiple back surface filed structures, a metal barrier layer and a conductive rubber layer. The improvement of the manufacturing method mainly lies in the fact that before forming the conductive rubber layer, the metal barrier layer is formed on the surface of the dielectric layer, and the material is silver, molybdenum, titanium-tungsten alloy, tungsten, titanium, chromium, molybdenum-tungsten alloy, platinum, gold, nickel or alloy of any combination of the materials mentioned above. By using the metal barrier layer as a surface barrier of the dielectric layer, the material of the conductive rubber layer can be prevented from diffusing in the dielectric layer in the sintering process, and further, the damage of the conductive rubber layer to the dielectric layer can be avoided, so that the dielectric layer has good quality and good effect of reducing the carrier recombination rate, and the cell conversion efficiency can be increased.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a solar cell and a manufacturing method thereof, in particular to a solar cell with a back electric field structure and a manufacturing method thereof. Background technique

[0002] refer to figure 1 , is a schematic diagram of the manufacturing process of a known solar cell 1, and the structure of the solar cell 1 is first described here (please refer to figure 1 The last figure of ) mainly includes: a wafer 11 , a dielectric layer 12 , a plurality of local back surface field structures 13 (local back surface field, LBSF for short) formed on local parts of the wafer 11 , and a metal glue layer 14 .

[0003] Wherein, the wafer 11 is used to convert light energy into electrical energy, and includes a p-type silicon substrate, an n-type emitter layer formed on the substrate, and film layers such as an anti-reflection film. The dielectric layer 12 is formed on the back surface 111 of the wafer 11 to reduce the rate of carrier re...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More