Highly Efficient Monolithic Perovskite/TOPCon Silicon Tandem Solar Cells Enabled by “Halide Locking”

Abstract Perovskite/silicon tandem solar cells (TSCs) are promising candidates for commercialization due to their outstanding power conversion efficiencies (PCEs). However, controlling the crystallization process and alleviating the phases/composition inhomogeneity represent a considerable challenge for perovskite layers grown on rough silicon substrates, ultimately limiting the efficiency and stability of TSC. Here, this study reports a “halide locking” strategy that simultaneously modulates the nucleation and crystal growth process of wide bandgap perovskites by introducing a multifunctional ammonium salt, thioacetylacetamide hydrochloride (TAACl), to bind with all types of cations and anions in the mixed…

• CU
  City University of Hong Kong

  Award: MRP/040/21X
• NN
  National Natural Science Foundation of China

  Awards: RCBS20210609103736094, 52322318, 62001308
• RG
  Research Grants Council, University Grants Committee

  Awards: CityU PDFS2425‐1S11, 11306521, N_CityU102/23, C1055‐23G, C4005‐22Y
• IA
  Innovation and Technology Fund

  Awards: ITS/147/22FP, 11306521, MRP/040/21X, MHP/079/23
• ST
  Science, Technology and Innovation Commission of Shenzhen Municipality

  Award: JCYJ20220818101018038
• NK
  National Key Research and Development Program of China

  Award: 2023YFB3809700