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Apr 10th, 2014
 
Panasonic heterojunction solar cell achieves world record efficiency of 25.6%
 
Panasonic Corporation announced that it has achieved a conversion efficiency of 25.6% (cell area*3: 143.7 cm²) in its HIT® solar cells, a major increase over the previous world record for crystalline silicon-based solar cells.
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Outline of the core technologies of the Panasonic advanced HIT® cell.
Outline of the core technologies of the Panasonic advanced HIT® cell.
The high conversion efficiency was achieved at a research level using a HIT® solar cell of a practical size

The previous record*4 for the conversion efficiency of crystalline silicon-based solar cells of a practical size (100 cm² and over) was 24.7%, as announced by Panasonic in February 2013 (cell area: 101.8 cm²). The new record is 0.9 points higher and the first to break through the 25% barrier for practical size cells.

This new record is also an improvement of 0.6 points over the previous record for small area crystalline silicon-based solar cells (cell area: 4 cm²) of 25.0%*4,5.

The achievement of this new record was made possible by further development of Panasonic's proprietary heterojunction technology*6 to realize the high conversion efficiency and superior high temperature properties of the company's HIT solar cells as well as adopting a back-contact solar cell structure, with the electrodes on the back of the solar cell, which allows the more efficient utilization of sunlight.

Outline of the core technologies behind the record conversion efficiency

1. Reduction in recombination loss
2. Reduction in optical loss
3. Minimizing resistance loss

Going forward, Panasonic will continue to pursue technology development of its HIT solar cells, aimed at realizing higher efficiency, lower costs and the more efficient use of resources, and will work towards mass production.


 
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