The photocurrent response in the perovskite device based on coordination polymers: structure, topology, band gap and matched energy levels.

Using a rigid ditopic ligand, 4,5-di(4'-carboxylphenyl)benzene (HL), three coordination polymers (CPs) formulated as MnL(HO) (1), CdL(HO) (2) and MnL(DMF) (3) have been synthesized and structurally characterized by single-crystal X-ray diffraction. These three CPs display 2D architectures but with different topologies. The experimental data and DFT calculation indicate that CP 2 is a semiconductor, and its CB/VB energy levels match with those of the perovskite CHNHPbI.