BC (Back Contact) solar cells are a next-generation high-efficiency PV technology, featuring all electrodes relocated to the rear side to eliminate front-side shading. This design increases light absorption and improves current density (Jsc), while delivering a cleaner appearance, making it ideal for advanced applications such as BIPV.
HJT (Heterojunction Technology) cells employ a sophisticated architecture combining crystalline silicon wafers with hydrogenated amorphous silicon (a-Si:H) thin films. The core structure involves sequential deposition of intrinsic amorphous silicon (i-a-Si:H) and doped amorphous silicon layers (p/n-a-Si:H) on both sides of N-type crystalline silicon substrates, forming high-quality heterojunction interfaces.
TOPCon (Tunnel Oxide Passivated Contact) solar cells are a mainstream high-efficiency N-type PV technology, featuring a rear-side passivated contact structure composed of an ultra-thin SiO₂ tunneling layer (~1.5 nm) and a doped polysilicon (Poly-Si) layer.
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