HJT Cells

Advantages of HJT Solar Cells

Heterojunction (HJT) solar cells feature a naturally symmetric structure, offering a theoretical efficiency close to the limit of crystalline silicon. Dinto Solar’s HJT cells achieve 26.9% efficiency. Compared with other photovoltaic technologies, HJT cells provide higher bifaciality, lower degradation, and a simplified four-step manufacturing process that enables the use of thinner wafers while significantly reducing carbon footprint. With copper-metallized HJT (C-HJT) technology, silver is replaced by copper plating, lowering material costs while further enhancing efficiency and reliability—delivering high-performance, sustainable solar solutions.

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27.2%

Cell Champion Efficiency

4-Steps

HJT technology requires only four core process steps, significantly fewer than the more than ten steps required for TOPCon and BC technologies. This results in higher yield, lower energy consumption, and improved process controllability.

HJT / C-HJT

4 Steps

TOPCon / BC

10+ Steps

Texturing & Cleaning

PECVD

PVD

Metallization Patterning

Thinner Silicon Wafer

90-110μm

HJT / C-HJT

Silver-free Solar Cell Manufacturing

Silver

155 kg CO₂/kg

Copper

3.97 kg CO₂/kg

Silver-free C-HJT mass production cuts the carbon footprint of copper to just 2.56% of silver, significantly lowering overall emissions.
Copper delivers electrical conductivity and mechanical strength comparable to silver, yet is 1,600 times more abundant and costs only one-tenth as much — making it an ideal, sustainable choice for the solar industry.

Efficiency, Defined by Heterojunction

HJT technology combines crystalline silicon with ultra-thin amorphous silicon layers on both sides of the wafer. The intrinsic and doped a-Si layers form the critical heterojunction interface, effectively passivating the silicon surface, minimizing energy losses, and unlocking higher conversion efficiency. Dinto Solar has achieved a champion HJT cell efficiency of 26.9% and a module efficiency of 24.47%.

Streamlined Manufacturing Process

Thinner Silicon Wafer

HJT cells utilize thinner silicon wafers, minimizing thermal damage and eliminating the need for high-temperature diffusion. This significantly reduces silicon consumption and overall energy usage, resulting in lower costs and a markedly reduced carbon footprint.

Silver-free Solar Cell Manufacturing

Silver-free C-HJT mass production cuts the carbon footprint of copper to just 2.56% of silver, significantly lowering overall emissions.
Copper delivers electrical conductivity and mechanical strength comparable to silver, yet is 1,600 times more abundant and costs only one-tenth as much — making it an ideal, sustainable choice for the solar industry.