das angesehene pv magazine bringt auf seiner englischprachigen global-page jeweils zum wochenende einen längeren artikel. im artikel vor einem monat ging es darum welche technik in zukunft wohl die aktuell noch mengenmässig dominante perc technologie ablösen wird. der neutral formulierte artikel wirft einen blick in die zukunft und analysiert die chancen der verschiedenen techniken zur herstellung von solarmodulen. die patentierte heterojunction von meyer burger sieht dabei ganz gut aus - insbesondere die einsparung von herstellungsschritten spricht für hjt. bei perc braucht es 7 herstellungschritte, topcon braucht 9 oder 10, hjt hingegen nur 4!
"Compared with TOPCon and other traditional solar cell technologies, HJT is quite a different beast. Perhaps by virtue of its uniqueness HJT has won many supporters.
HJT’s production is considerably simpler than TOPCon, with far fewer steps. Compared to the seven manufacturing processes of PERC and nine to ten of TOPCon, HJT only needs four major process steps in total across the cell production line. Additionally, because of its technical features, HJT cells have a higher level of bifaciality – more than 90%.
Many features of HJT ameliorate the inherent defects of PERC. It exhibits better power performance in low light conditions, it is free of light induced degradation (LID) and potential induced degradation (PID) and exhibits a lower temperature coefficient.
HJT is also more compatible with thinner wafers and cells, with reduced thickness seen as a significant cost-reduction lever – particularly in times of rising polysilicon prices. HJT is also seen to be a good fit for combination with perovskites in tandem cells, which could deliver quite amazing conversion efficiencies, potentially of more than 30%."
www.pv-magazine.com/2021/05/08/...ekend-read-life-after-perc/