The HBC cell was developed independently by Longi using an all-laser patterning process. This is a new world record for monocrystalline silicon solar cells breaking Longi’s own 26.81% efficiency record from November 2022.
All-Laser Patterning Process Solves High Patterning Cost Problem
To reduce the problem of high patterning costs for back-contact cells, Longi’s R&D team has abandoned the costly photolithography process, and successfully developed an all-laser patterning process. This was used for the new record cell with an efficiency of 27.09%.
Did you miss that? Is back contact technology the cell technology of the future?
Further Cost Reduction Through Reduced Indium Usage
Another advantage of HBC cells over bifacial heterojunction solar cells is the reduced usage of indium tin oxide layers (ITO). Through continuous technological improvements, Longi has developed an ultra-thin transparent conductive oxide (TCO) layer with reduced indium usage. The indium usage of the record cell is only 1/5 of that of traditional bifacial heterojunction solar cells, resulting in further cost savings. (hcn)
