Table 1 Composition and photophysical properties of representative thin-film samples.

λem is the wavelength at the emission maxima, ϕ is the PLQE, and τavg is the average PL lifetime. FWHM, full width at half maximum.

SampleComposition
(CsPbBr3:EDABr2:NaBr)
λem (nm)FWHM (nm)ϕ (%)τavg (ns)
CsPbBr31:0:0525230.514
CsPbBr3-Na1:0:0.03525230.518
EDA51:1:04982281.5200
EDA5-Na1:1:0.034782472150