Emissive defect states, which are particularly prone to forming within large bandgap semiconductors, can detrimentally affect the performance of LEDs. The presence of defect states in semiconductors often manifests as changes in the PL spectrum upon varying the excitation wavelength. Figure demonstrates the photoluminescence (PL) spectra of perovskite films under excitation wavelengths ranging from 260 nm to 360 nm. Notably, the consistency of the PL spectra across these excitation wavelengths suggests that PEA2PbCl1Br3 exhibits solely band-to-band emission without significant additional radiative states. Moreover, there is only a minor contribution from red-shifted self-trapped excitons (STEs) to the PL emission. Given that [PbCl6]based perovskites are known for their broad white emission stemming from STEs, the absence of broad emission in PEA2PbCl1Br3 could be attributed to the predominance of bromide in the [PbX6] octahedral sites, as our synthesis involved a lower proportion of chloride substitution. This clarity in the PL spectra underscores the potential of PEA2PbCl1Br3 as a promising candidate for UV electroluminescence (EL) applications. It should be noted that due to the relatively low photoluminescence quantum yield (PLQY) of PEA2PbCl1Br3 (we previously measured a value of 8% for PEA2PbBr4) and the low sensitivity of our integrating sphere in the UV wavelength region, we could not resolve accurate PLQY values of the UV films.