Table 1. Summary of Optical Properties, where Egabs and Egcal are the Band Gaps Acquired through Elliot Fitting, as Illustrated in Figure S2, and DFT Calculation, as Depicted in Figure 2, Respectively.
| compounds | Egcal (eV) | Egabs (eV) | maximum PL peak (eV) | Stokes shift (Egabs ∼ Max.PL), (eV) | fwhm (eV) |
|---|---|---|---|---|---|
| (PEA)2PbBr4 | 2.92 | 2.96 | 3.00 | 0.04 | 0.26 |
| (PEA1.5BZA0.5)PbBr4 | 2.97 | 3.02 | 3.01 | 0.01 | 0.23 |
| (PEABZA)PbBr4 | 3.00 | 3.04 | 3.01 | 0.03 | 0.25 |
| (BZA)2PbBr4 | 3.05 | 3.09 | 3.03 | 0.06 | 0.21 |