Volume 9, Pages (November 2018)

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Presentation transcript:

Volume 9, Pages 337-346 (November 2018) Stable Sn/Pb-Based Perovskite Solar Cells with a Coherent 2D/3D Interface  Ziming Chen, Meiyue Liu, Zhenchao Li, Tingting Shi, Yongchao Yang, Hin-Lap Yip, Yong Cao  iScience  Volume 9, Pages 337-346 (November 2018) DOI: 10.1016/j.isci.2018.11.003 Copyright © 2018 The Author(s) Terms and Conditions

iScience 2018 9, 337-346DOI: (10.1016/j.isci.2018.11.003) Copyright © 2018 The Author(s) Terms and Conditions

Figure 1 Morphologies and Crystal Orientations of CH3NH3Sn0.5Pb0.5IxCl3-x Films with Different Concentrations of NAP (A) The choice of NAP molecule is inspired by the chemical structures of γ-butyrolactone and polyvinylpyrrolidone, which can strongly interact with perovskite due to the C=O group in the pyrrolidinone unit. (B) Scanning electron microscopic images (top view/cross-sectional view) and GIWAXS measurements of CH3NH3Sn0.5Pb0.5IxCl3-x thin films with different concentrations of NAP. (C) Magnified image of the marked area in B; besides the 3D{110} signals, there are two diffraction dots in the small qxy-value region, which are assigned as the 2DA(n = 1) and 2DB(n = 1) structures of (NAP)2Sn0.5Pb0.5I4 perovskite, and their normalized signals along the qxy axis are also shown, illustrating that 2D perovskite started to form after adding 72 mM NAP. See the main text for a detailed discussion. iScience 2018 9, 337-346DOI: (10.1016/j.isci.2018.11.003) Copyright © 2018 The Author(s) Terms and Conditions

Figure 2 TEM Images of CH3NH3Sn0.5Pb0.5IxCl3-x Thin Film with 72 mM NAP (A) The 2DA(n = 1) structure and the magnified area 1 (marked with a red dashed line). The red lines in the magnified figure show a head-to-head alignment between adjacent [MI6]4- planes. (B) The 2DB(n = 1) structure and the magnified area 2 (marked with a red dashed line). The red lines in the magnified figure show a shift between adjacent [MI6]4- planes by a distance of half of the lattice. (C) The non-periodic vertically oriented 2D perovskites contain higher layer numbers. (D) Schematic diagram of the nanostructure of 2D/3D hybrid perovskite grains. (A), (B), and (C) have the same magnification, and the scale bar shown in (A) also applies to (B) and (C). iScience 2018 9, 337-346DOI: (10.1016/j.isci.2018.11.003) Copyright © 2018 The Author(s) Terms and Conditions

Figure 3 Device Architecture, Performance, and Stability of PVSCs (A) Solar cell architecture. (B) I-V curves of PVSC with 72 mM NAP. (C) Device stability of PVSCs with different concentrations of NAP (average stability of 4 devices). All devices were stored in ambient condition with relative humidity of 30% ± 5% without any encapsulation. (D) The time-dependent stabilized power output of the PVSC with 72 mM NAP measured at the maximum power point. (E) Device stability of PVSCs with different concentrations of NAP under continuous illumination in an N2-filled glovebox (average stability of 4 devices). (F) EQEs and the integrated current densities of PVSCs with different concentrations of NAP. iScience 2018 9, 337-346DOI: (10.1016/j.isci.2018.11.003) Copyright © 2018 The Author(s) Terms and Conditions