High-temperature “firing” processes used in passivated emitter rear contact (PERC) and tunnel oxide passivated contact (TOPCon) solar cell production are unsuitable for perovskite and heterojunction (HJT) devices. Mark Hutchins explores how next-generation manufacturers are getting around the problem.
Pastes with higher silver content are required to achieve quality metallization without high temperature processing.
Photo: DKEM
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