Photovoltaic cell and method of manufaturing such a cell

A technology of photovoltaic cells and dielectric layers, applied in photovoltaic power generation, circuits, electrical components, etc.

Inactive Publication Date: 2014-04-02
STICHTING ENERGIEONDERZOEK CENT NEDERLAND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Efficiency loss due to recombination is limited to the fingers

Method used

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  • Photovoltaic cell and method of manufaturing such a cell
  • Photovoltaic cell and method of manufaturing such a cell
  • Photovoltaic cell and method of manufaturing such a cell

Examples

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Embodiment Construction

[0030] figure 1 A plan view of the upper surface of a photovoltaic cell comprising an electrode structure 10 with conductive material above a semiconductor body 12 is shown. For example, an electrode structure with a plurality of fingers 14 and a bus bar 16 is shown. The fingers 14 extend from the bus bar 16 along the length direction of the fingers 14 indicated by arrow A. As shown in FIG.

[0031] figure 2 A schematic cross-section through the finger 14 in this direction is shown. A dielectric layer 20 is arranged above the semiconductor body 12 . Between the fingers 14 and the semiconductor body 12 a plurality of contacts 22 are provided through the dielectric layer 20 . The contacts 22 are made of a fire through material, ie usually of sintered conductor grains.

[0032] image 3A flowchart showing a process for making photovoltaic cells. After several conventional preliminary steps, symbolically identified as first step 31 , the process provides an intermediate pr...

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Abstract

A fire through conductor paste is applied as a plurality of mutually separate islands on a dielectric layer on a semi-conductor body of a photo- voltaic cell. A connecting structure of a further conductor paste is applied connecting the islands, at least on the dielectric layer between locations of the islands, so that the islands are connected by the connecting structure. Different compositions are used for the fire through conductor paste and the further conductor paste, which behave differently during firing. The fire through conductor paste and the further conductor paste are fired under process conditions wherein the fire through conductor paste fires through the dielectric layer and the further conductor paste does not fire through the dielectric layer. In this way the fire through metal paste establishes electric contact through the dielectric layer between the semi-conductor body and a structure formed from the further conductor paste.

Description

technical field [0001] The invention relates to a photovoltaic cell and a method of manufacturing a photovoltaic cell. Background technique [0002] A photovoltaic cell (eg, a solar cell) includes a semiconductor body having an electrode on its surface, the electrode being in electrical contact with the semiconductor body. [0003] US 5,279,682 discloses a solar cell in which the intimate contact of the bus bar and the semiconductor body is removed. The cell has fingers in low resistance electrical contact with the semiconductor substrate and a bus bar of conductive material at right angles to the fingers and in low resistance electrical contact with the front surface of each finger. The fingers are made from a paste or viscous ink designed to form intimate contact with the underlying semiconductor substrate. Bus bars consist of a selected paste or viscous ink or epoxy composition containing conductive metal particles applied to an anti-reflective coating at right angles t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0224H01L31/18
CPCH01L31/022425Y02E10/50
Inventor 兰伯特·约翰·格尔里格斯
Owner STICHTING ENERGIEONDERZOEK CENT NEDERLAND
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