fig3

Figure 3. (A) XRD patterns of Cs₃CeI₆@CBP films compared with simulated Cs₃CeI₆; (B) XPS full spectrum of Cs₃CeI₆ and Cs₃CeI₆@CBP films; (C) Ce 3d XPS spectra of Cs₃CeI₆ and Cs₃CeI₆@CBP films; (D) I 3d XPS spectra of Cs₃CeI₆ and Cs₃CeI₆@CBP films. XRD: X-ray diffraction; CBP: 4,4′-Bis(N-carbazolyl)-1,1′-biphenyl; XPS: X-ray photoelectron spectroscopy.