Extended Data Fig. 5: In-situ PL measurements of Sn-based perovskites with various additives during the spin-coating process.
From: Additive treatment yields high-performance lead-free perovskite light-emitting diodes
a, Tetrabutylammonium chloride. b, Tetraphenylphosphonium chloride. c, Trioctylamine. d, Triphenyl phosphine. e, 4-Aminopyrimidine. f, 2-Naphthylamine. g, Pyrimidine. h, Pyridine. i, Thiophene. j, Pentanol. It shows that the Tetrabutylammonium chloride or Tetraphenylphosphonium chloride can effectively suppress the PL quenching effect compared with Trioctylamine or Triphenyl phosphine, suggesting the cation of additives plays an important role in eliminating the PL quenching of tin perovskite. Moreover, the 4-Aminopyrimidine (the fragment of VmB1) and 2-Naphthylamine also can reduce the PL quenching of tin perovskite, which indicates that additives with –NH2 group also can impede the fast aggregation of clusters.
