Interfacial modulation of organic-inorganic two-dimensional superlattices for efficient electromagnetic wave absorption

•Preparation of PANI-V2O5 organic-inorganic superlattice structures for electromagnetic wave absorption.•Constructing molecular-level heterogeneous interfaces to enhance the interfacial polarization.•DFT calculations and finite element simulations reveal the electromagnetic wave absorption mechanism.•A remarkable effective absorption bandwidth of 6.40 GHz at 2.1 mm was obtained.