Table 1 Selected 10 perovskite compounds

From: Machine learning-enabled chemical space exploration of all-inorganic perovskites for photovoltaics

Formula

\(\Delta {H}_{{\rm{decomp}}}-T\Delta {S}_{{\rm{mix}}}\) (meV atom−1)

τ

Egap(eV)

\({E}_{{\rm{gap}}}^{{\rm{PBE}}0}\) (eV)

\({m}_{{\rm{e}}}^{* }({m}_{{\rm{e}}}\))

\({m}_{{\rm{h}}}^{* }\)(\({m}_{{\rm{e}}})\)

SLME (%)@ 1μm

CGCNN

PBESol

CGCNN

PBESol

min

max

min

max

CsGe0.5625Sn0.4375Br3

−98.18

−98.58

4.00

0.07

0.11

1.39

0.06

0.11

0.04

0.05

36.26

CsGe0.3125Sn0.6875I3

−46.58

−47.46

4.17

0.17

0.20

1.34

0.07

0.10

0.05

0.06

36.40

CsPb0.3125Sn0.6875Br3

−78.19

−78.36

4.05

0.41

0.41

1.73

0.13

0.16

0.01

0.11

28.53

CsGe0.375Pb0.625I3

−29.73

−30.94

4.17

0.49

0.53

1.77

0.11

0.14

0.11

0.14

29.33

CsGe0.0625Pb0.3125Sn0.625Br3

−84.17

−83.95

4.01

0.38

0.39

1.71

0.12

0.16

0.09

0.10

28.96

CsGe0.4375Pb0.0625Sn0.5Br3

−98.20

−98.23

3.95

0.10

0.18

1.48

0.08

0.10

0.05

0.06

34.58

CsGe0.25Pb0.5625Sn0.1875I3

−42.97

−44.17

4.17

0.46

0.50

1.71

0.12

0.15

0.11

0.14

30.20

CsGe0.5625Hg0.3125Sn0.125Cl3

−103.41

−108.21

3.88

0.12

0.33

1.75

0.27

1.86

0.26

0.59

21.18

CsCd0.0625Ge0.25Pb0.5Sn0.1875I3

−46.57

−44.17

4.17

0.48

0.55

1.75

0.12

0.20

0.12

0.18

28.82

CsCd0.125Ge0.5625Hg0.1875Sn0.125Cl3

−106.60

−110.31

3.89

0.31

0.44

1.87

0.36

1.91

0.22

0.46

20.83

  1. \({m}_{{\rm{e}}}^{* }\) and \({m}_{{\rm{h}}}^{* }\) represent the effective mass of electrons and holes, respectively. The minimum and maximum effective masses obtained from calculations in different directions in reciprocal space are presented. Spectroscopic limited maximum efficiency (SLME) is calculated assuming 1 μm thick photon absorber.
  2. CGCNN-predicted and PBESol-calculated thermodynamic stability term \((\Delta {H}_{{\rm{decomp}}}-T\Delta {S}_{{\rm{mix}}})\) and bandgaps (Egap) are presented. Band edges of all selected compounds lie on the gamma point