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Double-sided crystalline silicon solar battery sheet

A technology of solar cells and crystalline silicon, applied in the field of solar cells, can solve the problems of low cell efficiency, achieve the effects of increasing short-circuit current, reducing power consumption and shading area, and increasing light trapping effect

Pending Publication Date: 2019-02-01
SUZHOU TALESUN SOLAR TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the cell efficiency of current PERC cells is relatively low

Method used

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  • Double-sided crystalline silicon solar battery sheet
  • Double-sided crystalline silicon solar battery sheet
  • Double-sided crystalline silicon solar battery sheet

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Embodiment Construction

[0022] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art. It should be noted here that the descriptions of these embodiments are used to help understand the present invention, but are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not constitute a conflict with each other.

[0023] refer to Figure 1-3 As shown, the double-sided crystalline silicon solar cell according to the present invention includes a silicon substrate 3, a back passivation film 2 and a back electrode 1, the back passivation film 2 is stacked on the back side of the silicon substrate 3, and the back electrode 1 is arranged on the back passivation film...

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Abstract

The invention discloses a double-sided crystalline silicon solar battery sheet. The double-sided crystalline silicon solar battery sheet comprises a silicon substrate, a back passivation film and a back surface electrode; the back passivation film is stacked on the back surface of the silicon substrate; and the back passivation film is a blue film of which the thickness ranges from 60 and 90 nm; the back surface electrode includes a back silver electrode contacting the silicon substrate, a back aluminum main gate formed on the back passivation film, and a plurality of back aluminum auxiliary gates, wherein the back aluminum auxiliary gates intersect with the back aluminum main gate, and the back silver electrode is nested in the back aluminum main gate; and therefore, the short-circuit current and conversion efficiency of the back surface of the battery sheet can be improved.

Description

technical field [0001] The invention belongs to the field of solar cells, in particular to a double-sided crystalline silicon solar cell. Background technique [0002] P-type PERC double-sided cells have attracted widespread attention due to their simple preparation process, low cost, and double-sided power generation characteristics. According to the ITRPV forecast released by Semi in 2017, the share of bifacial monocrystalline cells in the future photovoltaic market will increase year by year, and the market share of bifacial cells will reach about 30% by 2027. Compared with the conventional PERC process, the double-sided battery only replaces the all-aluminum back field structure of the conventional PERC battery with printed aluminum grid lines on the back side on the basis of the original process. While maintaining the high conversion efficiency of the front side of the PERC battery, the back side can also generate electricity. However, the cell efficiency of current PE...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0216H01L31/0224
CPCH01L31/02168H01L31/022425Y02E10/50
Inventor 胡党平张树德魏青竹倪志春连维飞王金艺
Owner SUZHOU TALESUN SOLAR TECH CO LTD
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