Synthesis and characterization of layered perovskite-type organic-inorganic hybrids (C nH2n+1NH3)2(CH3NH3) m-1Pb mI3m+1 (n=5–10, m=1, 2)

Liling Guo; Dandan Zhao; Xiaoxue Zhai; Xiaoyan Gan; Hanxing Liu

doi:10.1007/s11595-017-1581-2

Journal of Wuhan University of Technology Materials Science Edition ›› 2017, Vol. 32 ›› Issue (1) : 205 -212. DOI: 10.1007/s11595-017-1581-2

Organic Materials

Synthesis and characterization of layered perovskite-type organic-inorganic hybrids (C_nH_2n+1NH₃)₂(CH₃NH₃)_m-1Pb_mI_3m+1 (n=5–10, m=1, 2)

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Abstract

Layered organic-inorganic hybrids (C_nH_2n+1NH₃)₂(CH₃NH₃)_m-1Pb_mI_3m+1 containing monolayer (m=1) and bilayer (m=2) perovsikte were synthesized by reactions in solution. The influences of the reactant ratio, solvent, reaction temperature, and reaction time on the structures of the products were investigated. The structures and the properties of the hybrids were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), and ultraviolet and visible (UV) absorption spectroscopy. The XRD patterns and the SEM images demonstrate that the pure bilayer perovskite hybrids are obtained. The UV-vis spectra indicate that the number of the inorganic perovskite layer (m) has greater impact on the band gap than the number of the carbon atoms (n). The band gap of bilayer hybrids (around 1.9 eV) is significantly less than that of monolayer hybrids (around 2.2 eV).

Keywords

layered Structure / organic-inorganic perovskite-type hybrid / band gap

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Liling Guo, Dandan Zhao, Xiaoxue Zhai, Xiaoyan Gan, Hanxing Liu. Synthesis and characterization of layered perovskite-type organic-inorganic hybrids (C_nH_2n+1NH₃)₂(CH₃NH₃)_m-1Pb_mI_3m+1 (n=5–10, m=1, 2). Journal of Wuhan University of Technology Materials Science Edition, 2017, 32(1): 205-212 DOI:10.1007/s11595-017-1581-2

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