fig3
Figure 3. Chemical analysis depending on Sn doping and DH injection. (A) FT-IR spectra of CsPbBr3, Sn, DH, and Sn:DH. Magnified FT-IR spectra showing (B) C-H, N-H, (C) C-H, and (D) C=C, C-Br; (E and F) Pb 4f XPS spectra of perovskites with/without Sn, DH, and both. DH: Dopamine hydrochloride; FT-IR: Fourier transform infrared; XPS: X-ray photoelectron spectroscopy.
