Heterojunction solar energy battery and manufacture method for the same

Abstract

The invention discloses a heterojunction solar energy battery and a manufacture method for the same. The heterojunction solar energy battery comprises a solar energy battery main body, a first patterning transparent conductive layer, and a second patterning transparent conductive layer, wherein the first patterning transparent conductive layer is formed on a first amorphous silicon semiconductor layer and has a plurality of first extension wrapping parts; the first extension wrapping parts partly wrap the rim of the first noncrystalline silicon semiconductor layer; the second patterning transparent conductive layer is formed on a second amorphous silicon semiconductor layer and forms at least one rim exposure area with the first patterning transparent conductive layer; and the rim exposure area enables the first patterning conductive layer to be disconnected from the second patterning transparent conductive layer.

Description

technical field [0001] The present invention relates to a heterojunction solar cell and its manufacturing method, in particular to a heterojunction solar cell that uses the first extended coating portion of the first patterned transparent conductive layer to cover the first amorphous silicon semiconductor layer to increase the photoelectric conversion efficiency. Mass junction solar cell and its manufacturing method. Background technique [0002] see figure 1 , figure 1 Schematic showing the cross-section of a prior art heterojunction crystalline silicon solar cell. As shown in the figure, a heterojunction silicon solar cell PA100 includes a solar cell body PA1 , a transparent conductive layer PA2 , a first electrode PA3 and a second electrode PA4 . The solar cell body PA1 includes a silicon crystal semiconductor layer PA11, a first intrinsic amorphous silicon semiconductor layer PA12, a first amorphous silicon semiconductor layer PA13, a second intrinsic amorphous silico...

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Problems solved by technology

As shown in the figure, the structure of a heterojunction crystalline silicon solar cell PA200 is similar to the above-mentioned heterojunction crystalline silicon solar cell PA100, but in order to avoid the leakage current caused by the contact between the upper and lower transparent conductive layers at the sides When the transparent conductive layer PA2a on the upper and lower sides of the heterojunction crystalline silicon solar cell PA200 is formed, it is directly covered by a mask, so that the edge of the solar cell body PA1a of the heterojunction crystalline silicon solar cell PA200 is exposed without Covered by the transparent conductive layer PA2a, the transparent conductive layer PA2a cannot be electrically contacted from the edge of the solar cell body PA1a

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