Difference between TOPCON and HJT (Heterojunction) Solar Cells
Two cutting-edge solar cell technologies, TOPCON (Tunnel Oxide Passivated Contact) and HJT (Heterojunction), each having special benefits and features. The following is a brief comparison between TOPCON and HJT solar cells.
TOPCON Solar Cells:
- Structure: Feature tunnel oxide passivated contacts on both front and rear sides.
- Efficiency: Known for very high efficiency, often exceeding 24%.
- Cost: Typically, more expensive due to advanced design.
- Light Absorption: Benefit from passivated contacts on both sides.
- Temperature Sensitivity: Less temperature-sensitive.
- Reliability: Proven and well-established technology.
HJT Solar Cells:
- Structure: Utilize a heterojunction structure with different semiconductor materials.
- Efficiency: Highly efficient, generally ranging from 22% to 24%.
- Cost: Can also be costly due to the complex heterojunction structure.
- Light Absorption: Improve light absorption by reducing reflection and enhancing light trapping.
- Temperature Sensitivity: Exhibit good temperature stability.
- Reliability: Promising but may lack extensive long-term reliability data.
In conclusion, as compared to conventional solar cells, both TOPCON and HJT solar cells offer great efficiency and enhanced performance. HJT cells use a heterojunction structure, whereas TOPCON cells feature passivated contacts on both sides. The decision is made based on the needs of the project, Budget, and the desire for increased efficiency and light absorption.
