tifying potential Pb-free perovskite candidates is from the view of electronic struc- ture. In Pb-based … ical formulae A2B(IV)X6, A3B(III)2X9, ABˊ(I)Bˊˊ(III)X6, and AB(V)X6, which deviate from the standard AB(II)X3 formula.40,47 This structural change will also affect the elec- … layered perovskite semiconductor. Chem.
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