Correlation transmission spectrogram
(A) Steady-state photoluminescence (PL) spectrum of NiOx (linear graph): 1#–5# (the concentration of MAI and PbI2 is fixed at 1 M, and the ratio of DMSO: PbI2 is changed from Adjust from 0:1 to 14.1:1 to keep the total solvent volume at 1 mL) (Bai et al., 2017).
(B) Transmission spectrum of CuSCN (Subbiah et al., 2014).
(C) Transmission spectrum of CuOX(Sun et al., 2016b).