A research team from the University of Santiago de Compostela and Ghent University has published a study on improving the efficiency of ultrathin CIGS (u-CIGS) solar cells. Using TCAD simulation tools, the study optimized rear-passivation parameters, including cell pitch, opening width, and interface trap density. Results showed that absorber thickness and doping concentration significantly influenced performance. However, traps at the u-CIGS/Al₂O₃ interface caused efficiency losses by increasing carrier recombination. Introducing a negative fixed charge density in the rear passivation layer reduced this recombination through field-effect passivation. The optimized device achieved 15% efficiency with a 1.5 µm cell pitch, 300 nm opening width, and a fixed bandgap. The findings improve understanding of rear-passivation effects on u-CIGS solar cell efficiency.
Efficiency in ultrathin solar cells redefined by Spain-Belgium study
Results underline how doping, and absorber thickness affect the efficiency of ultrathin CIGS solar cells. (Image Source: ScienceDirect)
Delft University researchers propose integrating inductors into PV modules to improve shade tolerance using MPPT. (Image Source: ScienceDirect)
Fraunhofer’s MaNiTU project developed perovskite-silicon tandem solar cells with 31.6% efficiency using scalable production methods. (Image Source: Fraunhofer ISE)
Through advanced passivation techniques, JA Solar’s Bycium+ cell has achieved a record-breaking open-circuit voltage of 748.6 mV. (Image Source: JA Solar)
To tackle challenges and advance AI-driven maintenance for a net-zero solar future, as revealed by Fluke’s survey. (Image Credit/Source: PublicDomainPictures/Pixabay)