As the EDS measurements clearly show the Pb : Br atomic ratio of the samples is slightly over-stoichiometric, it can be inferred that there are not a large amount of uncoordinated Pb atoms at the sample surface and the passivation effect of TPBi on surface defects may not be significant.
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Enhancing the performance of perovskite light-emitting devices through 1,3,5-tris(2-<i>N</i>-phenylbenzimidazolyl)benzene interlayer incorporation.
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