The electronic band-structure of NH4Pb2Br5 has been calculated, and the result reveals that NH4Pb2Br5 possesses a band gap of 2.5 eV (Figure 4a,b). The purpose of the calculation on electronic structures of NH4Pb2Br5 is to verify the existence of NH4Pb2Br5 in the aged MBNCs-PVDF ...
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