Abstract
Three new one-dimensional (1D) face-shared octahedral perovskites with unified APbBr3 composition, namely, [DTHPE]Pb2Br6 (1), [TMPDA]PbBr3 (2) and [MPD]PbBr3 (3) have been synthesized by using different types of organic cations. These 1D perovskites exhibit tunable broadband luminescence from orange to blue light emissions. Experimental and computational studies unveil that these broadband emissions are derived from the radiative recombination of self-trapped excitons due to strong electron–phonon coupling.
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