Fig. 2 Structural and spectroscopic characterization of 3D/2D perovskite bilayer. Structural and spectroscopic characterization of 3D/2D perovskite bilayer.

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Presentation transcript:

Fig. 2 Structural and spectroscopic characterization of 3D/2D perovskite bilayer. Structural and spectroscopic characterization of 3D/2D perovskite bilayer. Structural characterizations of perovskite films. (A) XRR data of pure 2D, 3D, and 3D/2D perovskite films. a.u., arbitrary unit. (B) GIXD data of pure 2D, 3D, and 3D/2D perovskite films. The angle of incidence is 0.14°, which is slightly above the critical angle at the used x-ray energy (22 keV). (C to E) GIWAXS data of 3D, 3D/2D, and pure 2D perovskite films (angle of incidence = 0.1°). Green and orange circles denote the 2D-β and 2D-γ structures, respectively. (F) Radially integrated intensity of GIWAXS data at two different angles of incidences to change between bulk (0.2°) and surface (0.1°) sensitivity. (G) TRPL decay traces recorded from the 3D and 3D/2D perovskite films. Yuhang Liu et al. Sci Adv 2019;5:eaaw2543 Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).