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Controllable Growth of Two-Dimensional Perovskite Microstructures


Two-dimensional (2D) Ruddlesden-Popper perovskites with large exciton binding energy and great environmental stability have recently attracted great attention for their promising potential optoelectronic applications. Controllable growth of 2D perovskites with desired shape would be critical for improving the performance of 2D perovskite based optoelectronic devices. However, the investigation on this is still in its infancy. Here we report on the controllable synthesis of 2D (C4H9NH3)2PbI4 microstructures with butterfly shape, (C4H9NH3)2(CH3NH3)Pb2I7 and (C4H9NH3)2PbI4/(C4H9NH3)2(CH3NH3)Pb2I7 microstructures with square shape by a solution-processed method. We have systematically investigated the influence of substrate, mass ratio and crystallization temperature on the morphology evolution of the as-synthesized 2D perovskite microstructures. Atomic force microscope (AFM) and optical microscope (OM) images show that the size and thickness of the resultant products are positively correlated with mass ratio and negatively correlated with crystallization temperature. X-ray diffraction (XRD) pattern, fluorescence imaging, temperature-dependent photoluminescence (PL) and absorption studies confirm the crystalline structures and optical properties of the as-synthesized regular shaped 2D perovskite microstructures. Our studies provide a simple method to controllably synthesize 2D perovskite microstructures without using very toxic solvent and thus offer a platform to investigate the optical and charge transport properties of 2D perovskite materials for further designing new device architectures with enhanced performance.

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Publication details

The article was received on 03 Jul 2018, accepted on 08 Sep 2018 and first published on 10 Sep 2018

Article type: Paper
DOI: 10.1039/C8CE01087K
Citation: CrystEngComm, 2018, Accepted Manuscript
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    Controllable Growth of Two-Dimensional Perovskite Microstructures

    D. Li, C. Fang, J. Li, J. Wang, R. Chen, H. Wang, S. Lan, Y. Xuan, H. Luo and P. Fei, CrystEngComm, 2018, Accepted Manuscript , DOI: 10.1039/C8CE01087K

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