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4. Synthesis, characterization, thermal, and electrical properties of new diammonium hybrid perovskite [NH3-(CH2)7-NH3]CaCl2Br2;Abdel-Aal;J. Solid State Ionics,2017
5. Effect of organic chain length on structure, electronic composition, lattice potential energy, and optical properties of 2D hybrid perovskites [(NH3)(CH2)n(NH3)]CuCl4, n= 2–9;Abdel-Aal;J. Applied Physics A,2017