Fig. 2: Structure analysis and electrochromic performance of Fe4[Fe(CN)6]3 (Prussian blue, PB).
From: Electrochromic smart windows with co-intercalation of cations and anions for multi-band regulations
a Crystal structure of PB. b XRD patterns of PB in different states (PW, PB, PG, and PY), the right is a magnified view of the (200) crystal plane. c Cyclic voltammetry (CV) curve of PB at a scan rate of 100 mV s−1 between −0.6 and 1.4 V and its in-situ transmittance curve. d Two-dimensional contour plot of in-situ transmittance spectrum change with voltage. XPS spectra of (e) Fe 2p, f C 1s and g N 1s of PW, PB, PG and PY. XPS spectra of (h) K 2p of PW, Cl 2p of PG. i Crystal structure schematic diagram of possible ion intercalation situations of PW, PB, PG, and PY. j Lattice constants “a” and their volume of PB in different states (PW, PB, PG, and PY). Note: Prussian blue (PB), Prussian white (PW), Prussian green (PG) and Prussian yellow (PY).
