HJT Technology

Introduction of HJT
HJT technology (HJT) is a N type bifacial solar panel technology, by leveraging
N-type monocrystalline silicon as a substratum and depositing silicon-based
thin films with different characteristics and transparent conductive films on
the front and rear surfaces respectively.

Combining with the benefits of crystalline silicon and amorphous silicon thin-
fim technologies, HJT technology has excellent photoabsorption and passivation
effects, as well as outstanding efficiency and performance. HJT panels are one
of the technologies to improve the conversion rate and power output to the
highest level, also represent the trend of the new generation of solar cell
platform technology.

Advantages of HJT
Higher Conversion Efficiency
HJT solar cell uses α-Si thin-film as passivation materials to reduce the loss
caused by the migration, which could increase the open circuit voltage to 750mV
and guarantee the efficiency up to 24% at beginning.

More Energy Yield
Due to the natural mono bifacial symmetrical structure, bifaciality of HJT
solar module could be up to 97%. And the energy yield gains can reach more
than 30% benefiting from the power generation on the back side.

Lower Degradation Rate
HJT solar cells are made of n-type wafer which does not have B-O bond,
resulting in no LID. TCO film on HJT solar cell is conductive, so the charge
won't polarize on the surface, which can avoid PID from the structure.

Better Weak Light Performance
The minority carrier lifetime of N type bifacial solar cell is longer, leading
a better power generation under weak-light, which is about 0.5%~1% higher than
that of bifacial PERC solar cell per watt.

Thinner Wafer Adapted
HJT solar cell can realize 100μm wafer application while ensuring the quality,
and can be superimposed with busbar-free and shingle technology to improve the
efficiency and save the cost.

Ultra-low Carbon Footprint
By the end of 2023, Huasun will achieve an estimated carbon footprint of HJT
solar module manufacturing as low as 397g/W through ongoing technological
research and industrialization.

Infinite future of HJT
Huasun energy will gradually realize the technical iterations of HJT solar cell
from 3.0 (double side μc-Si) , 4.0 (double side μc-si with Cu plating) , 5.0
(full back-contact) to heterojunction-perovskite tandem cells, and eventually
reach the efficiency of 28% in mass production. The increase in efficiency will
further reduce the LCOE. Combining with the continuous decrease in the cost of
silicon wafer, metallization, TCO, equipment and production, HJT will truly
become the new generation of mainstream solar cell technology.

Huasun is planning to fully apply silver-coated copper paste combined with
busbar-free technology in 2023. In 2024, through the application of copper
plating technology, the silver consumption per watt will be reduced to 0 mg.

Huasun aims to achieve 800W module power output and 28% cell efficiency by 2025
through the superposition of heterojunction and perovskite.

Roadmap of Huasun
Taking HJT as the core, Huasun keeps enhancing clients' confidence of solar
energy's future via higher product efficiency, more stable power generation
performance, better quality assurance and platform-based technology expansion
capabilities.

After more than two years of unremitting efforts, Huasun has not only achieved
the leap from HJT 1.0 (double side α-Si) to 2.0 (single side μc-Si) in
technical terms, but also transformed the technical results into mass
production, and become the world's largest HJT manufacturer, with the
capability of providing high-efficient HJT solar products in a long-term and
stable manner to the market which is in high demand.

At present, the highest efficiency of Huasun HJT solar cells in mass production
has reached 25.61%, as in the leading position of PV industry. With the premise
of ensuring cell efficiency, the company is constantly exploring the methods of
cost reduction of HJT solar cells by taking measures of thinning the silicon
wafer and introducing silve & copper paste, in order to accelerate the pace of
industrialization and marketization of this high-efficient solar cell
technology.

If you want to know more kinds of monocrystalline bifacial solar cells, please
visit our website.

Minimum Order: 1000 sets

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