Photo-layer | Architecture | Scan direction | Efficiency/% | Jsc/mAcm−2 | Voc/V | FF |
---|---|---|---|---|---|---|
(CH3NH3)3Bi2I9 | Normal | Rev | 0.21 (0.22) | 0.40 (0.38) | 0.64 (0.68) | 0.81 (0.88) |
 |  | Fwd | 0.07 (0.06) | 0.29 (0.26) | 0.53 (0.53) | 0.45 (0.43) |
(CH3NH3)3Bi2I9 | Inverted | Rev | 0.00 (0.00) | 0.27 (0.30) | 0.00 (0.00) | – |
 |  | Fwd | 0.00 (0.00) | 0.22 (0.25) | 0.00 (0.00) | – |
(CH3NH3)3Sb2I9 | Normal | Rev | 0.080 (0.095) | 0.25 (0.30) | 0.45 (0.45) | 0.70 (0.69) |
 |  | Fwd | 0.057 (0.07) | 0.21 (0.26) | 0.43 (0.42) | 0.62 (0.61) |
(CH3NH3)3Sb2I9 | Inverted | Rev | 0.058 (0.061) | 0.45 (0.43) | 0.38 (0.38) | 0.36 (0.37) |
 |  | Fwd | 0.057 (0.055) | 0.45 (0.42) | 0.36 (0.35) | 0.35 (0.35) |
(CH3NH3)3SbBiI9 | Normal | Rev | 0.099 (0.11) | 0.27 (0.31) | 0.59 (0.57) | 0.64 (0.62) |
 |  | Fwd | 0.067 (0.084) | 0.23 (0.29) | 0.55 (0.54) | 0.55 (0.52) |
(CH3NH3)3SbBiI9 | Inverted | Rev | 0.05 (0.10) | 0.44 (0.46) | 0.32 (0.50) | 0.34 (0.44) |
 |  | Fwd | 0.06 (0.11) | 0.44 (0.46) | 0.34 (0.52) | 0.35 (0.47) |