BT Imaging’s inspection systems use a proprietary photoluminescence imaging technology. With applications across the PV manufacturing supply chain, their systems enable yield and cell efficiency gains for PV manufacturing lines. BTi’s products enable PV manufacturers throughout the supply chain to maximize their profits and reduce manufacturing cost via assessment of material and process quality. Resulting data and knowledge can be used to effectively predict cell performance, identify process faults, and enable process control and yield maximisation.
Existing production-line inspection techniques for wafers are performed only late in the manufacturing process when current-voltage characteristics of each complete cell can be measured using contacting instruments. Costs could be significantly lowered and product quality enhanced if inspections were possible throughout the production process.
The company offers manual tools for the laboratory and fast automated tools for production, with expertise in ingot/bock manufacturing inspection as well as wafer grading.