HJT VS TOPCon?

HJT (Heterojunction) and TOPCon (Tunnel Oxide Passivated Contact) solar panels each have unique advantages and characteristics.

Advantages of HJT solar panels include:

? High conversion efficiency: Mass production efficiency is generally above 24% and is expected to increase to above 30%.

? No light degradation (LID) and potential induced degradation (PID) issues: Improves battery reliability.

? Low temperature coefficient: Small performance degradation and stable output power in high temperature environments.

? High bifacial ratio: supports silicon wafer thinning and bifacial power generation, increasing power generation.

? Good low-light effect: It can still maintain good power generation performance in an environment with insufficient light.

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The advantages of TOPCon solar panels include:

? The theoretical limit efficiency is as high as 28.7%: close to the theoretical limit efficiency of crystalline silicon solar cells.

? Good interface passivation and carrier transport capabilities: By adding an ultra-thin layer of silicon dioxide and doped polysilicon layer on the battery surface, surface recombination and metal contact recombination are reduced.

? Suitable for high-temperature environments: performance degradation in high-temperature environments is small.

? Compatible with existing crystalline silicon cell production lines: lowers the technical threshold and cost of industrial upgrading.

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Both technologies play an important role in improving solar cell efficiency, reducing costs and broadening application scenarios. As technology continues to mature and become industrialized, the performance of solar cells will be further improved in the future, providing strong technical support for achieving clean energy transition and addressing climate change.