Solar energy battery

Abstract

The invention discloses a solar energy battery, which comprises a first conductive type substrate, a second conductive type semiconductor layer, a passivation layer, a first electrode layer and a second electrode layer. The second conductive type semiconductor layer is arranged on the first conductive type substrate and the passivation layer is arranged on the second conductive type semiconductorlayer. The first electrode layer arranged on the passivation layer comprises at least one connection part, a plurality of extension parts and a plurality of edge parts. The edge of the connection part is non-linear. The plurality of extension parts are connected with the connection part, which extends from the two sides of the connection part to the edge of the first conductive type substrate. The edge parts connect all the extension parts extending to the edge of the first conductive type substrate together. The second electrode layer is arranged corresponding to the first electrode layer. The solar energy battery helps to reduce the light-shielding area of the first electrode layer so to lower the usage and manufacture cost of electrode materials.

Description

technical field [0001] The present invention relates to a solar cell, and in particular to a solar cell capable of increasing light incident amount. Background technique [0002] Because solar energy has the characteristics of never being exhausted, and it is a clean and non-polluting energy that will not exhaust natural resources, how to effectively use the sun to solve the problems of pollution and shortages faced by current petrochemical energy Energy has become one of the most focused focuses today. Among them, solar cells can directly convert solar energy into electrical energy, which has become a very important research topic at present. [0003] Silicon-based solar cells are a common solar cell in the industry. The principle of silicon-based solar cells is to add some impurities to high-purity semiconductor materials (silicon) to make them exhibit different properties. When sunlight irradiates the semiconductor material of the solar cell, the energy provided by the ...

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Problems solved by technology

[0004] However, if the metal electrode of the solar cell covers the light incident surface, the absorption of sunlight will decrease as the area covered by the metal electrode increases, resulting in the photoelectric conversion structure below it being unable to absorb light due to the shielding of the electrode. , and the metal electrodes on the light incident surface are likely to cause reflection of incident light

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