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Calculated values of Ef(bulk) and Ef(VA) (cf. main text for definitions) for the considered A2GeX4 perovskites
| Perovskite | Ef(bulk) | Ef(VA) | Water stable? |
|---|---|---|---|
| PEA2GeBr4 | −4.15 | 3.98 | no |
| BrPEA2GeBr4 | −4.12 | 4.18 | no |
| (BPEA)2GeI4 | −4.65 | 4.92 | yes |
| (BPEA)2GeBr4 | −4.80 | 5.26 | yes |
