Skip to main content
. 2023 Dec 10;11(7):2305182. doi: 10.1002/advs.202305182

Figure 1.

Figure 1

Absorption and PL data of 2D perovskites. Comparison of absorption and PL spectra of a) (PEA)2PbI4 and b) (BA)2PbI4. Dashed vertical lines indicate the energy of individual optical transitions. The black (gray) arrows indicate the large Δ > 20 meV (small Δ < 20 meV) energy spacing between the optical transitions. c) Energy difference Δ for several 2D perovskites. The gray region indicates the lower Δ < 20 meV data. Diamonds – literature data after Refs. [30, 31, 32, 34], circles ‐ this work. All data measured at T = 4.2 K.