Crystal Growth and Dissolution of Methylammonium Lead Iodide Perovskite in Sequential Deposition: Correlation between Morphology Evolution and Photovoltaic Performance

2017 ◽  
Vol 9 (10) ◽  
pp. 8623-8633 ◽  
Author(s):  
Tsung-Yu Hsieh ◽  
Chi-Kai Huang ◽  
Tzu-Sen Su ◽  
Cheng-You Hong ◽  
Tzu-Chien Wei
Keyword(s):  
Crystal Growth ◽  
Photovoltaic Performance ◽  
Morphology Evolution ◽  
Lead Iodide ◽  
Sequential Deposition ◽  
Methylammonium Lead Iodide

scholarly journals Chemical engineering of methylammonium lead iodide/bromide perovskites: tuning of opto-electronic properties and photovoltaic performance

2015 ◽  
Vol 3 (43) ◽  
pp. 21760-21771 ◽  
Author(s):  
Byung-wook Park ◽  
Bertrand Philippe ◽  
Sagar M. Jain ◽  
Xiaoliang Zhang ◽  
Tomas Edvinsson ◽  
...  
Keyword(s):  
Electronic Properties ◽  
Chemical Engineering ◽  
Photovoltaic Performance ◽  
Lead Iodide ◽  
Hybrid Perovskite ◽  
Lead Source ◽  
Methylammonium Lead Iodide

A convenient 1-step spincoating method for the hybrid perovskite MAPb(I1−xBrx)3(Cl)y, with PbCl2 as lead source, enables tuning of the bandgap.

The chemical origin of the p-type and n-type doping effects in the hybrid methylammonium–lead iodide (MAPbI3) perovskite solar cells

2015 ◽  
Vol 51 (80) ◽  
pp. 14917-14920 ◽  
Author(s):  
Lyubov A. Frolova ◽  
Nadezhda N. Dremova ◽  
Pavel A. Troshin
Keyword(s):  
Solar Cells ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Lead Iodide ◽  
Doping Effects ◽  
P Type ◽  
Methylammonium Lead Iodide

A field-induced and photoinduced self-doping chemistry of the MAPbI3 perovskite films affecting their photovoltaic performance and stability is proposed.

scholarly journals The dynamics of methylammonium ions in hybrid organic–inorganic perovskite solar cells

2015 ◽  
Vol 6 (1) ◽  
Author(s):  
Aurelien M. A. Leguy ◽  
Jarvist Moore Frost ◽  
Andrew P. McMahon ◽  
Victoria Garcia Sakai ◽  
W. Kockelmann ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Time Window ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Lead Iodide ◽  
High Efficiency Solar Cells ◽  
Scattering Measurements ◽  
Quasielastic Neutron ◽  
Methylammonium Lead Iodide

Abstract Methylammonium lead iodide perovskite can make high-efficiency solar cells, which also show an unexplained photocurrent hysteresis dependent on the device-poling history. Here we report quasielastic neutron scattering measurements showing that dipolar CH3NH3 + ions reorientate between the faces, corners or edges of the pseudo-cubic lattice cages in CH3NH3PbI3 crystals with a room temperature residence time of ∼14 ps. Free rotation, π-flips and ionic diffusion are ruled out within a 1–200-ps time window. Monte Carlo simulations of interacting CH3NH3 + dipoles realigning within a 3D lattice suggest that the scattering measurements may be explained by the stabilization of CH3NH3 + in either antiferroelectric or ferroelectric domains. Collective realignment of CH3NH3 + to screen a device’s built-in potential could reduce photovoltaic performance. However, we estimate the timescale for a domain wall to traverse a typical device to be ∼0.1–1 ms, faster than most observed hysteresis.

scholarly journals Molecular Dynamics Simulations of Two-Step Process Enable Room-Temperature Synthesis of α-FAPbI3

2020 ◽  
Author(s):  
Paramvir Ahlawat ◽  
Haizhou Lu ◽  
Amita Ummadisingu ◽  
Haiyang Niu ◽  
Michele Invernizzi ◽  
...  
Keyword(s):  
Room Temperature ◽  
Solid Phase ◽  
Perovskite Solar Cells ◽  
X Ray Diffraction ◽  
Lead Iodide ◽  
Sequential Deposition ◽  
Solid Phase Transition ◽  
Dynamics Simulations ◽  
Methylammonium Lead Iodide ◽  
Temperature Crystallization

It is well established that the lack of understanding the crystallization process in two-step sequential deposition has a direct impact on efficiency, stability and reproducibility of perovskite solar cells. Here, we try to understand the solid-solid phase transition occuring during two-step sequential deposition of methylammonium lead iodide and formamidinium lead iodide. Using metadynamics, X-ray diffraction and Raman spectroscopy, we reveal the microscopic details of this process. We find that the formation of perovskite proceeds through intermediate structures and report polymorphs found for methylammonium lead iodide and formamidinium lead iodide. From simulations, we discover a possible crystallization pathway for the highly efficient metastable α-phase of formamidinium lead iodide. Guided by these simulations, we perform experiments that results in the room temperature crystallization of α-formamidinium lead iodide.

Morphology evolution and degradation of methylammonium lead iodide under accelerated electron beam with energy of 1.8 MeV

2020 ◽  
Vol 529 ◽  
pp. 110573
Author(s):  
Lijun Yang ◽  
Jingchuan Wang ◽  
Yawei Hao ◽  
Pan Yang ◽  
Xiaochong Zhao
Keyword(s):  
Electron Beam ◽  
Morphology Evolution ◽  
Lead Iodide ◽  
Methylammonium Lead Iodide

scholarly journals Effects of Solution-Based Fabrication Conditions on Morphology of Lead Halide Perovskite Thin Film Solar Cells

2016 ◽  
Vol 2016 ◽  
pp. 1-12 ◽  
Author(s):  
Jeremy L. Barnett ◽  
Vivien L. Cherrette ◽  
Connor J. Hutcherson ◽  
Monica C. So
Keyword(s):  
Solar Cells ◽  
Film Formation ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Thin Film Solar Cells ◽  
Solution Temperature ◽  
Processing Conditions ◽  
Lead Iodide ◽  
Methylammonium Lead Iodide ◽  
Lead Halide

We present a critical review of the effects of processing conditions on the morphology of methylammonium lead iodide (CH3NH3PbI3) perovskite solar cells. Though difficult to decouple from synthetic and film formation effects, a single morphological feature, specifically grain size, has been evidently linked to the photovoltaic performance of this class of solar cells. Herein, we discuss experimental aspects of optimizing the (a) temperature and time of annealing, (b) spin-coating parameters, and (c) solution temperature of methylammonium iodide (MAI) solution.

scholarly journals A combined molecular dynamics and experimental study of two-step process enabling low-temperature formation of phase-pure α-FAPbI3

2021 ◽  
Vol 7 (17) ◽  
pp. eabe3326
Author(s):  
Paramvir Ahlawat ◽  
Alexander Hinderhofer ◽  
Essa A. Alharbi ◽  
Haizhou Lu ◽  
Amita Ummadisingu ◽  
...  
Keyword(s):  
Low Temperature ◽  
Solid Phase ◽  
Perovskite Solar Cells ◽  
X Ray Diffraction ◽  
Lead Iodide ◽  
Sequential Deposition ◽  
Phase Pure ◽  
Low Temperature Crystallization ◽  
Methylammonium Lead Iodide ◽  
Temperature Crystallization

It is well established that the lack of understanding the crystallization process in a two-step sequential deposition has a direct impact on efficiency, stability, and reproducibility of perovskite solar cells. Here, we try to understand the solid-solid phase transition occurring during the two-step sequential deposition of methylammonium lead iodide and formamidinium lead iodide. Using metadynamics, x-ray diffraction, and Raman spectroscopy, we reveal the microscopic details of this process. We find that the formation of perovskite proceeds through intermediate structures and report polymorphs found for methylammonium lead iodide and formamidinium lead iodide. From simulations, we discover a possible crystallization pathway for the highly efficient metastable α phase of formamidinium lead iodide. Guided by these simulations, we perform experiments that result in the low-temperature crystallization of phase-pure α-formamidinium lead iodide.

scholarly journals Molecular Dynamics Simulations of Two-Step Process Enable Room-Temperature Synthesis of α-FAPbI3

2020 ◽  
Author(s):  
Paramvir Ahlawat ◽  
Haizhou Lu ◽  
Amita Ummadisingu ◽  
Haiyang Niu ◽  
Michele Invernizzi ◽  
...  
Keyword(s):  
Room Temperature ◽  
Solid Phase ◽  
Perovskite Solar Cells ◽  
X Ray Diffraction ◽  
Lead Iodide ◽  
Sequential Deposition ◽  
Solid Phase Transition ◽  
Dynamics Simulations ◽  
Methylammonium Lead Iodide ◽  
Temperature Crystallization

It is well established that the lack of understanding the crystallization process in two-step sequential deposition has a direct impact on efficiency, stability and reproducibility of perovskite solar cells. Here, we try to understand the solid-solid phase transition occuring during two-step sequential deposition of methylammonium lead iodide and formamidinium lead iodide. Using metadynamics, X-ray diffraction and Raman spectroscopy, we reveal the microscopic details of this process. We find that the formation of perovskite proceeds through intermediate structures and report polymorphs found for methylammonium lead iodide and formamidinium lead iodide. From simulations, we discover a possible crystallization pathway for the highly efficient metastable α-phase of formamidinium lead iodide. Guided by these simulations, we perform experiments that results in the room temperature crystallization of α-formamidinium lead iodide.

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