Figure 3.

a) PLE spectra and b) PL spectra of Cs₃Cu₂I₅ NCs measured at different emission and excitation wavelengths, respectively. c) Pseudocolor map of temperature‐dependent PL spectra of the Cs₃Cu₂I₅ NCs. d) The correlation between integrated PL intensity and temperature derived from (c). By fitting the curve, the exciton binding energy was extracted. e) The fitting results of the FWHM as a function of temperature derived from (c). f) The coordinate diagram demonstrating the photophysical process in Cs₃Cu₂I₅ NCs.