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What’s the difference between HJT, HIT, HDT and SHJ solar pv cell?

HJT and SHJ are two abbreviations for silicon heterojunction solar cell in English, all meaning silicon heterojunction solar cell.

HIT is the abbreviation of Heterojunction with intrinsic thin-layer in English, meaning heterojunction with intrinsic thin layer, which has been applied as a patent trademark by Sanyo Corporation of Japan.

What's the difference between HJT, HIT, HDT and SHJ solar pv cell?
What’s the difference between HJT, HIT, HDT and SHJ solar pv cell?

HDT is the abbreviation of hetero-junction double-sided technology in English, meaning heterojunction double-sided technology.

HJT, HIT, HDT and SHJ are four different names for heterojunction cells.

A heterojunction cell is a solar cell using a heterojunction structure. The basic principle is to form a heterojunction on an N-type silicon substrate by depositing amorphous silicon and serve as a passivation layer. The battery with this structure has high open circuit voltage and efficiency, and at the same time, the outermost layer has a TCO transparent conductive layer.

The process of heterojunction cells adopts a low-temperature process, which facilitates the use of thinner N-type silicon wafers, so that there will be a relatively large room for reducing the cost of silicon wafers in the future.

The mass production efficiency of the industry is about 24%, and the double-sided rate has reached more than 90%. However, at present, heterojunction cells also have problems such as high equipment and material costs, and difficult process control.

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