[10a-N104-1~9] 16.3 Bulk, thin-film and other silicon-based solar cells

▲ [10a-N104-9] Investigating the recombination junction in perovskite-silicon tandem solar cells

〇Calum McDonald¹, Vladimir Svrcek¹, Hitoshi Sai¹, Atsushi Kogo¹, Takurou Murakami¹, Masayuki Chikamatsu¹, Yuji Yoshida¹, Takuya Matsui¹ (1.AIST)

Keywords:silicon, perovskite, tandem

Perovskite-silicon tandem solar cells have been reported in the literature with efficiencies of >29%, and usually employ complex stacks with numerous deposition steps which are rather unattractive from an industrial perspective. We therefore fabricated a simplified tandem structure consisting of a perovskite n-i-p stack on a silicon heterojunction (SHJ) structure, and have obtained efficiencies of ~18% without anti-reflection coating with a Voc of >1.7 V. The optimization of the recombination junction between the top and bottom cells is expected to provide further performance improvement. In this study, we have investigated the influence of various interlayers and annealing conditions on the recombination junction between a thin-film silicon layer used in the SHJ bottom cell and an SnO₂ electron transport layer used in the perovskite top cell.