Kesterite tech news
JA Solar Technology Co., Ltd. (SHE: 002459) announced on July 21, 2026, the successful certification of its "DeepBlue 5.0 K" series, a high--efficiency module utilizing a Kesterite (CZTS) thin--film layer as a top absorber in a 2--terminal tandem structure with p--type PERC cells.
Key technical specifications include:
- Conversion Efficiency: 23.5% certified power conversion.
- Architecture: 2--terminal tandem "K--on--PERC" design.
- Cost Efficiency: 15% reduction in manufacturing costs compared to standard tandem alternatives.
- Sustainability: Utilizes earth--abundant, non--toxic materials to replace rare--earth components.
JA Solar positions this product as a strategic bridge to extend the commercial viability of existing PERC manufacturing infrastructure while meeting the increasing demand for sustainable, cadmium--free thin--film solutions.