Abstract
Currently, two-dimensional (2D) layered organic–inorganic hybrid perovskites with good stability against moisture have attracted great interest, which are potential substitute for three-dimensional (3D) lead halide CH3NH3PbX3 (MAPbX3) (X = I, Br, Cl) perovskites. Herein, we reported a one-pot solvothermal approach for the preparation of 2D hybrid perovskite (HO(CH2)2NH3)2PbBr4 (EA2PbBr4) with ethanolamine organic layer. Electrochemical measurements including current-voltage measurements, impedance spectroscopy and Mott-Schottky were investigated to derive detailed electronic and band energetic structures. Moreover, through the accelerated moisture-tolerance and photocatalytic degradation test, the novel 2D product exhibited greatly enhanced stability compared to 3D MAPbBr3 perovskites and the lower efficiency due to the insulating properties of the organic cations in 2D (HO(CH2)2NH3)2PbBr4.
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