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Table 7 Photovoltaic performance of (CH3NH3)3Bi2I9, (CH3NH3)3Sb2I9, (CH3NH3)3SbBiI9 photon harvesting layer based mesoscopic normal and inverted planar architecture solar cells

From: Lead-free perovskite solar cells using Sb and Bi-based A3B2X9 and A3BX6 crystals with normal and inverse cell structures

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)
  1. Data shown here represent the average of three independent solar cell parameters. Best representative photovoltaic parameters are shown in the bracket