DIFFERENCE BETWEEN PERC AND TOPCON SOLAR MODULE TECHNOLOGY

 

PERC (Passivated Emitter and Rear Cell) and TOPCon (Tunnel Oxide Passivated Contact) modules are two advanced solar cell technologies designed to improve efficiency and performance. Here are the main differences between them:

PERC Modules:

1. Structure: PERC cells feature a passivated layer on the rear side, which reduces electron recombination and enhances light absorption.
2. Efficiency: PERC technology generally achieves higher efficiencies than traditional cells, often reaching around 20-22% for commercial modules.
3. Cost: PERC cells can be produced using existing manufacturing processes, making them relatively cost-effective.
4. Performance: PERC modules offer better performance in low-light conditions and improved temperature coefficients compared to standard solar cells.
5. Light-Induced Degradation (LID): PERC cells can be affected by LID, similar to traditional P-type cells.

TOPCon Modules:

1. Structure: TOPCon cells incorporate a thin tunnel oxide layer on the rear side, combined with a highly doped silicon layer. This configuration allows for more effective passivation of both the front and rear surfaces.
2. Efficiency: TOPCon technology typically achieves even higher efficiencies, often exceeding 22% and approaching 25% in some cases.
3. Cost: The manufacturing process for TOPCon is more complex, which can lead to higher production costs, although efficiencies may justify the investment.
4. Performance: TOPCon modules excel in high-temperature performance and light-induced degradation, offering improved long-term stability.
5. LID Resistance: TOPCon cells are generally more resistant to LID compared to PERC cells, contributing to better reliability over time.

Summary:

• PERC: Easier to produce, moderate efficiency (20-22%), effective for low-light conditions, susceptible to LID.
• TOPCon: Higher efficiency (22-25%), complex production, excellent temperature performance, and better LID resistance.

Choosing between PERC and TOPCon modules will depend on specific project requirements, budget, and desired efficiency