Enhanced Grain Size and Crystallinity in CH3NH3PbI3 Perovskite Films by Metal Additives to the Single-Step Solution Fabrication Process

MRS Advances ◽  
2018 ◽  
Vol 3 (55) ◽  
pp. 3237-3242 ◽  
Author(s):  
Zahrah S. Almutawah ◽  
Suneth C. Watthage ◽  
Zhaoning Song ◽  
Ramez H. Ahangharnejhad ◽  
Kamala K. Subedi ◽  
...  
Keyword(s):  
Grain Size ◽  
Solar Cells ◽  
High Performance ◽  
High Efficiency ◽  
Perovskite Solar Cells ◽  
Precursor Solution ◽  
Single Step ◽  
Fabrication Process ◽  
Lead Iodide ◽  
Methylammonium Lead Iodide

ABSTRACTMethods of obtaining large grain size and high crystallinity in absorber materials play an important role in fabrication of high-performance methylammonium lead iodide (MAPbI3) perovskite solar cells. Here we study the effect of adding small concentrations of Cd2+, Zn2+, and Fe2+salts to the perovskite precursor solution used in the single-step solution fabrication process. Enhanced grain size and crystallinity in MAPbI3 films were obtained by using 0.1% of Cd2+ or Zn2+in the precursor solution. Consequently, solar cells constructed with Cd- and Zn-doped perovskite films show a significant improvement in device performance. These results suggest that the process may be an effective and facile method to fabricate high-efficiency perovskite photovoltaic devices.

scholarly journals Intermediate Phase‐Free Process for Methylammonium Lead Iodide Thin Film for High‐Efficiency Perovskite Solar Cells

2021 ◽  
pp. 2102492
Author(s):  
Yeonghun Yun ◽  
Devthade Vidyasagar ◽  
Minho Lee ◽  
Oh Yeong Gong ◽  
Jina Jung ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
High Efficiency ◽  
Intermediate Phase ◽  
Perovskite Solar Cells ◽  
Lead Iodide ◽  
Free Process ◽  
Methylammonium Lead Iodide

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 High efficiency single-junction semitransparent perovskite solar cells

2014 ◽  
Vol 7 (9) ◽  
pp. 2968-2973 ◽  
Author(s):  
Cristina Roldán-Carmona ◽  
Olga Malinkiewicz ◽  
Rafael Betancur ◽  
Giulia Longo ◽  
Cristina Momblona ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Perovskite Solar Cells ◽  
Lead Iodide ◽  
Single Junction ◽  
Methylammonium Lead Iodide

Semitransparent efficient methylammonium lead iodide perovskite based solar cells.

Structure of Methylammonium Lead Iodide Within Mesoporous Titanium Dioxide: Active Material in High-Performance Perovskite Solar Cells

Nano Letters ◽  
2013 ◽  
Vol 14 (1) ◽  
pp. 127-133 ◽  
Author(s):  
Joshua J. Choi ◽  
Xiaohao Yang ◽  
Zachariah M. Norman ◽  
Simon J. L. Billinge ◽  
Jonathan S. Owen
Keyword(s):  
Titanium Dioxide ◽  
Solar Cells ◽  
High Performance ◽  
Active Material ◽  
Perovskite Solar Cells ◽  
Lead Iodide ◽  
Mesoporous Titanium Dioxide ◽  
Methylammonium Lead Iodide

Evaporation-Induced Self-Assembly of Semi-Crystalline PbI2(DMSO) Complex Films as a Facile Route to Reproducible and Efficient Planar p-i-n Perovskite Solar Cells

MRS Advances ◽  
2018 ◽  
Vol 3 (32) ◽  
pp. 1807-1817 ◽  
Author(s):  
Brandon Dunham ◽  
Vivek Vattipalli ◽  
Christos Dimitrakopoulos
Keyword(s):  
Solar Cells ◽  
Self Assembly ◽  
Large Scale ◽  
High Efficiency ◽  
Perovskite Solar Cells ◽  
Single Step ◽  
Lead Iodide ◽  
Active Layers ◽  
Evaporation Induced Self Assembly ◽  
Complex Film

ABSTRACTHigh quality active layers for hybrid organic-inorganic perovskite solar cells are essential for achieving maximum device performance. However, perovskite active layers in solar cells are frequently prepared with unoptimized processes that lead to layers of inferior quality. This is often the case when research focuses on other aspects of the solar cell device, such as device design and architecture, carrier transport layers, electrodes, interlayers, etc. In this study, a single-step spin-coating method was used to prepare semi-crystalline PbI2(DMSO) complex films via evaporation-induced self-assembly. These optimized intermediate films were then used to form homogeneous methylammonium lead iodide (MAPbI3) perovskite films of optimum thickness (ca. 400 nm) with uniform surface coverage, good crystallinity, high purity, and grain sizes up to one micron, by employing a sequential deposition process involving intramolecular exchange between the PbI2(DMSO) complex film and a methylammonium iodide (MAI) layer deposited on top of it. We found that for certain ranges of MAI concentration, the formation of optimal-quality perovskite active layers was independent of MAI concentration, so long as MAI deposition occurred at specific corresponding spin speeds. Planar p-i-n perovskite solar cells comprising the optimized active layers were fabricated, and they exhibited negligible hysteresis and a maximum power conversion efficiency (PCE) of 16.72%, without any additional compositional and interfacial engineering. The latter can be used in the future to further enhance the PCE. These findings demonstrate the importance of an optimized perovskite active layer for reproducibly fabricating high-efficiency planar p-i-n photovoltaic devices. Additionally, the simplicity of the PbI2(DMSO) complex film preparation and the versatility of the MAI deposition with this fabrication method further enhances the potential of this material for large-scale processing.

Grain size control for high-performance formamidinium-based perovskite solar cells via suppressing heterogenous nucleation

2021 ◽  
Vol 9 (1) ◽  
pp. 208-213
Author(s):  
Xiaoxiao Xu ◽  
Yuhai Sun ◽  
Dingchao He ◽  
Zheng Liang ◽  
Guozhen Liu ◽  
...  
Keyword(s):  
Grain Size ◽  
Solar Cells ◽  
Homogeneous Nucleation ◽  
High Performance ◽  
Defect Density ◽  
Perovskite Solar Cells ◽  
Size Control ◽  
Precursor Solution ◽  
Grain Size Control ◽  
Heterogenous Nucleation

By introducing ED and TAP into precursor solution, homogeneous nucleation is encouraged to occur and films with large grain size and lower defect density were obtained.

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