What does hit battery mean?

hit battery is a solar cell; hit is the abbreviation of "Heterojunction with intrinsic Thinlayer", that is, a silicon solar cell using a hit structure, with an open circuit voltage of "729mV"; the HIT structure is to deposit a layer of non-woven fabric on a crystalline silicon wafer A doped hydrogenated amorphous silicon film and a layer of doped hydrogenated amorphous silicon film of the opposite doping type to the crystalline silicon.

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What does hit battery mean?

HIT (Heterojunction with intrinsic Thinlayer)

HIT, the Chinese name is Solar cell, the foreign name is Heterojunction with intrinsic Thinlayer, which is a silicon solar cell with HIT structure and an open circuit voltage of 729mV.

Silicon solar cells using HIT structure. The so-called HIT structure is to deposit a layer of undoped (intrinsic) hydrogenated amorphous silicon film and a layer of doped material opposite to the doped type of crystalline silicon on the crystalline silicon wafer. Hybrid hydrogenated amorphous silicon film, after taking this process measure, the performance of PN junction is improved. As a result, the conversion efficiency reaches 23%, the open circuit voltage reaches 729mV, and the entire process can be implemented below 200°C.

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##HIT battery, commonly known as heterojunction battery, Chinese name crystal Silicon heterojunction solar cells, this technical process is to deposit amorphous silicon thin films on crystalline silicon. It combines the core competitiveness of crystalline silicon cells and thin film cells. It is one of the popular trends in high conversion efficiency silicon-based solar cells. .

Compared with traditional crystalline silicon technology, taking into account the construction of amorphous silicon thin films, the front and rear surfaces of the crystalline silicon substrate of silicon heterojunction solar cells have undergone advanced passivation treatment, so that the surface Passivation treatment is becoming more and more perfect.

Advantages of heterojunction HIT cells

1. Wide range of applications: HIT batteries are widely used in solar panels, urban public transportation, communication equipment, power installation projects, national defense technology, or in different economic fields such as ocean navigation and domestic aviation. HIT batteries play an important role that cannot be missed.

2. High potential for efficiency improvement: The N-type silicon wafer used in HIT cells has a high minority carrier lifetime, and the corresponding structure of amorphous silicon passivation treatment can also achieve a lower surface recombination rate, so that the silicon heterojunction solar cells The open circuit voltage is much higher than traditional monocrystalline silicon solar cells, and its efficiency potential is as high as 2% greater than the current PERC cells using P-type silicon wafers

3. Low cost, simple and uncomplicated production process: HIT cells combine the low-temperature manufacturing advantages of thin-film solar cells and avoid traditional high-temperature processes. The HIT process is relatively simple, and all production processes can be realized in only four parts

4. High stability and high efficiency: HIT cells have good light stability. The Staebler-Wronski effect is not found in the amorphous silicon film in the heterojunction, which means that the cell conversion efficiency will not show signs of decline due to light exposure.

5. Double-sided battery: HIT battery is a very good double-sided battery. There is basically no color difference between the front and the back, and the bifacial rate (referring to the ratio of the efficiency of the back of the battery to the efficiency of the front) can reach more than 90%, which is extremely high. Reaching 98%, the core competitiveness of backside power generation is obvious.

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