HJT battery, also known as heterojunction battery, is a special PN junction, which is composed of amorphous silicon and crystalline silicon. It is an N-type battery in which an amorphous silicon film is deposited on crystalline silicon.
HIT (heterojunction with intrinsic thin film) battery was first developed by sanyo company of Japan in 199. Because HIT has been registered as a trademark by Sanyo, it is also called HJT, HDT or SHJ.
the laboratory efficiency of p>HIT battery is over 26%, and the average mass production efficiency of existing mainstream manufacturers is 23%. In terms of efficiency, it is indeed a step higher than PERC battery. HJT battery technology is simple.
at present, PERC, the mainstream battery technology in the market, needs 8-1 processes, while HJT process only has 4 processes, namely cleaning and texturing, amorphous silicon film deposition, TCO film preparation and screen printing. Among them, cleaning, texturing and screen printing are all traditional silicon battery processes, while HJT's unique process is used for amorphous silicon film deposition and TCO film deposition.