fig1

Figure 1. (A) A schematic illustration of blue-emitting FA_0.9GA_0.1Pb_1-xMn_xBr₃ PNCs (x = input ratio) with increasing Mn²⁺ concentration; (B) Photograph and (C) measured PL spectra of colloidal FA_0.9GA_0.1Pb_1-xMn_xBr₃ PNC solutions under a UV lamp (excitation wavelength λ_ex = 365 nm); (D) Photoluminescence quantum yield (PLQY) and emission wavelength of FA_0.9GA_0.1Pb_1-xMn_xBr₃ PNCs (x = 0.4 and 0.9) and previously reported blue-emitting pure bromide-based PNCs^[28-35]; (E) CIE coordinates of FA_0.9GA_0.1Pb_1-xMn_xBr₃ PNCs with different x (black dot points) plotted on CIE chromaticity coordinates. PNCs: Perovskite nanocrystals; PL: photoluminescence; CIE: international commission on illumination.