fig2

Figure 2. Crystallization analysis of CsPbBr3 and Sn:DH as fresh and after 24 h. The TEM images of as-prepared (A) CsPbBr₃, and (C) Sn:DH, and after 24 h (B) CsPbBr₃, and (D) Sn:DH. The size distribution of (E) CsPbBr₃, and (F) Sn:DH after 24 h; (G) XRD patterns of fresh and 24 h later CsPbBr₃ and Sn:DH. TEM: Transmission electron microscopy; DH: dopamine hydrochloride; XRD: X-ray diffraction.