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Two-dimensional lead-free iodide-based hybrid double perovskites: crystal growth, thin-film preparation and photocurrent responses

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Abstract

Organometal halide perovskites (OHPs) are a kind of promising materials applied in solar cells. However, the toxicity of lead in OHPs is considered as an environmental problem. Herein, we report two lead-free two-dimensional (2D) iodide-based OHPs, namely (C6H16N2)2AgBiI8·H2O (AgBiI) and (C6H16N2)2CuBiI8·0.5H2O (CuBiI), where C6H14N2 = 1,4-cyclohexanediamine, with a double perovskite structure. These two bimetallic perovskites show the optical band gaps of 1.93 eV and 1.68 eV. In addition, these 2D perovskite materials can form smooth films through a simple one-step spin-coating approach. Photocurrent measurements under xenon lamp irradiation indicate obvious photoresponses, suggesting that these semiconducting materials have the potential for application in light harvesting.

Graphical abstract: Two-dimensional lead-free iodide-based hybrid double perovskites: crystal growth, thin-film preparation and photocurrent responses

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Publication details

The article was received on 25 Apr 2019, accepted on 24 Jul 2019 and first published on 26 Jul 2019


Article type: Communication
DOI: 10.1039/C9TA04325J
J. Mater. Chem. A, 2019, Advance Article

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    Two-dimensional lead-free iodide-based hybrid double perovskites: crystal growth, thin-film preparation and photocurrent responses

    L. Bi, Y. Hu, M. Li, T. Hu, H. Zhang, X. Yin, W. Que, M. S. Lassoued and Y. Zheng, J. Mater. Chem. A, 2019, Advance Article , DOI: 10.1039/C9TA04325J

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