Fig. 4: XRD patterns of the PTFs as a function of annealing time.
From: Dopant-additive synergism enhances perovskite solar modules
a, XRD patterns of the control PTF with only MACl as a function of annealing (100 °C) time. The peaks at 6.79° and 7.41° correspond to solvate phase S1 and the peak at 9.41° corresponds to solvate phase S2 (ref. 31). The peaks located at 11.99°, 13.39° and 14.15° correspond to the 2H phase (δ phase), hexagonal phase (4H) and 3C phase (α phase), respectively32. b, XRD patterns of the target PTF with both [Bcmim]Cl and MACl as a function of annealing (100 °C) time. c, XRD patterns of the PTF without MACl or [Bcmim]Cl as a function of annealing (100 °C) time. d, XRD patterns of the PTFs with only [Bcmim]Cl as a function of annealing (100 °C) time. e, XRD patterns of the PTFs after annealing at 100 °C for 60 min and at 150 °C for 10 min. The peak located at 12.70° corresponds to the (001) peak of PbI2. a.u., arbitrary units.
