AVS 66th International Symposium & Exhibition
    Thin Films Division Thursday Sessions
       Session TF+SS-ThA

Paper TF+SS-ThA9
Synthesis and Optical Properties of Organo-halide 2D Perovskites

Thursday, October 24, 2019, 5:00 pm, Room A122-123

Session: Metal Halide Perovskites, Other Organic/Inorganic Hybrid Thin Films
Presenter: Misook Min, University of North Texas
Authors: M. Min, University of North Texas
A.B. Kaul, University of North Texas
Correspondent: Click to Email
Organic-inorganic halide perovskite materials have attracted interest in recent years due to their excellent optoelectronic properties, such as high absorption coefficient, tunable band gap, small exciton binding energy. These advantages combined with the extremely low fabrication coat make this kind material suitable as a light absorber for solar cells, light emitting diodes, field-effect transistors and photo-detectors [1]. Hybrid organic-inorganic perovskite described by the formula ABX3 (A = organic ammonium cation, B = inorganic compounds, X = halide anion). Specifically, the iodide and bromide versions of CH3NH3PbX3 have led to a breakthrough in various research field. We report the scalable synthesis and properties of the 2D series of lead iodide (CH3(CH2)3NH3)2(CH3NH3)n-1PbnI3n+1(n = 2, 3, and 4) perovskites [2]. The 2D (CH3(CH2)3NH3)2(CH3NH3)n-1PbnI3n+1 were synthesized and materials characterization was conducted using atomic force microscopy (AFM), X-ray diffraction (XRD), and Photoluminescence (PL) spectroscopy. The crystal structure and surface morphology for n = 2, 3, and 4 perovskites was validated using XRD and AFM, and the peak optical absorption was consistent with the composition-tunable bandgap for these formulations occurring at ~ 2.18 eV, 2.06 eV, and 2.03 eV. Our results show that hybrid organic-inorganic perovskites can be easily and efficiently prepared. Also, the hybrid organic-inorganic perovskites define a promising class of stable and efficient light absorbing materials for photo-detectors and other applications.