scholarly journals Erratum: Corrigendum: Structures, Phase Transitions and Tricritical Behavior of the Hybrid Perovskite Methyl Ammonium Lead Iodide

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
P. S. Whitfield ◽  
N. Herron ◽  
W. E. Guise ◽  
K. Page ◽  
Y. Q. Cheng ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Lead Iodide ◽  
Hybrid Perovskite ◽  
Tricritical Behavior

scholarly journals Structures, Phase Transitions and Tricritical Behavior of the Hybrid Perovskite Methyl Ammonium Lead Iodide

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
P. S. Whitfield ◽  
N. Herron ◽  
W. E. Guise ◽  
K. Page ◽  
Y. Q. Cheng ◽  
...  
Keyword(s):  
Phase Transition ◽  
Phase Transitions ◽  
Structural Phase ◽  
Photovoltaic Performance ◽  
Orthorhombic Phase ◽  
Structural Phase Transitions ◽  
Lead Iodide ◽  
First Order ◽  
Hybrid Perovskite ◽  
The Impact

Abstract We have examined the crystal structures and structural phase transitions of the deuterated, partially deuterated and hydrogenous organic-inorganic hybrid perovskite methyl ammonium lead iodide (MAPbI3) using time-of-flight neutron and synchrotron X-ray powder diffraction. Near 330 K the high temperature cubic phases transformed to a body-centered tetragonal phase. The variation of the order parameter Q for this transition scaled with temperature T as Q ∼ (Tc−T)β, where Tc is the critical temperature and the exponent β was close to ¼, as predicted for a tricritical phase transition. However, we also observed coexistence of the cubic and tetragonal phases over a range of temperature in all cases, demonstrating that the phase transition was in fact first-order, although still very close to tricritical. Upon cooling further, all the tetragonal phases transformed into a low temperature orthorhombic phase around 160 K, again via a first-order phase transition. Based upon these results, we discuss the impact of the structural phase transitions upon photovoltaic performance of MAPbI3 based solar cells.

Ferroelastic domains and phase transitions in organic–inorganic hybrid perovskite CH3NH3PbBr3

2021 ◽  
Author(s):  
Maryam Bari ◽  
Alexei A. Bokov ◽  
Zuo-Guang Ye
Keyword(s):  
Phase Transitions ◽  
Electric Field ◽  
Light Microscopy ◽  
Domain Structure ◽  
Polarized Light ◽  
External Stress ◽  
Polarized Light Microscopy ◽  
Inorganic Hybrid ◽  
Hybrid Perovskite ◽  
Ferroelastic Domains

Polarized light microscopy reveals twin domains and symmetry of the phases in CH3NH3PbBr3 crystal; domain structure remains unresponsive to electric field but changes under external stress, confirming ferroelasticity while ruling out ferroelectricity.

scholarly journals Evidence of Pressure-Induced Phase Transitions and Negative Linear Compressibility in Formamidinium Manganese-Hypophosphite Hybrid Perovskite

2021 ◽  
Author(s):  
Mirosław Ma̧czka ◽  
Mikołaj Kryś ◽  
Szymon Sobczak ◽  
Daniel Linhares Militão Vasconcelos ◽  
Paulo Tarso Cavalcante Freire ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Hybrid Perovskite ◽  
Linear Compressibility

The Effect of Organic Cation Dynamics on the Optical Properties in (PEA)2(MA)[Pb2I7] Perovskite Dimorphs

2021 ◽  
Author(s):  
Lekina Yulia ◽  
Sai Dintakurti ◽  
Benny Febriansyah ◽  
David George Bradley ◽  
Jiaxu Yan ◽  
...  
Keyword(s):  
Phase Transition ◽  
Optical Properties ◽  
Raman Scattering ◽  
Organic Cation ◽  
Two Dimensional ◽  
Lead Iodide ◽  
Temperature Dependent ◽  
Hybrid Perovskite

Two-dimensional (2D) phenylethyl ammonium (PEA+)-methyl ammonium (MA+) lead iodide ((PEA)2(MA)[Pb2I7]) hybrid perovskite exists as temperature-dependent dimorphs exhibiting an ill-defined phase transition occurring over 150 - 200 K range. Raman scattering,...

scholarly journals Two-dimensional copper (II) halide-based hybrid perovskite templated by 2-chloroethylammonium: Crystal structures, phase transitions, optical and electrical properties

2020 ◽  
Vol 287 ◽  
pp. 121338 ◽  
Author(s):  
Farah Akrout ◽  
Fadhel Hajlaoui ◽  
Karim Karoui ◽  
Nathalie Audebrand ◽  
Thierry Roisnel ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Electrical Properties ◽  
Crystal Structures ◽  
Optical And Electrical Properties ◽  
Two Dimensional ◽  
Hybrid Perovskite

scholarly journals Spin-dependent charge transport through 2D chiral hybrid lead-iodide perovskites

2019 ◽  
Vol 5 (12) ◽  
pp. eaay0571 ◽  
Author(s):  
Haipeng Lu ◽  
Jingying Wang ◽  
Chuanxiao Xiao ◽  
Xin Pan ◽  
Xihan Chen ◽  
...  
Keyword(s):  
Charge Transport ◽  
Organic Molecules ◽  
Spin Valve ◽  
Lead Iodide ◽  
Force Microscopy ◽  
Atomic Force ◽  
Hybrid Perovskite ◽  
The Media ◽  
Inorganic Framework ◽  
Inorganic Layers

Chiral-induced spin selectivity (CISS) occurs when the chirality of the transporting medium selects one of the two spin ½ states to transport through the media while blocking the other. Monolayers of chiral organic molecules demonstrate CISS but are limited in their efficiency and utility by the requirement of a monolayer to preserve the spin selectivity. We demonstrate CISS in a system that integrates an inorganic framework with a chiral organic sublattice inducing chirality to the hybrid system. Using magnetic conductive-probe atomic force microscopy, we find that oriented chiral 2D-layered Pb-iodide organic/inorganic hybrid perovskite systems exhibit CISS. Electron transport through the perovskite films depends on the magnetization of the probe tip and the handedness of the chiral molecule. The films achieve a highest spin-polarization transport of up to 86%. Magnetoresistance studies in modified spin-valve devices having only one ferromagnet electrode confirm the occurrence of spin-dependent charge transport through the organic/inorganic layers.

Flex-Mode Mechatronic Functionality of Lead Iodide Hybrid Perovskite Systems

2018 ◽  
Vol 122 (9) ◽  
pp. 4802-4808 ◽  
Author(s):  
Aniruddha Basu ◽  
Prachi Kour ◽  
Swati Parmar ◽  
Rounak Naphade ◽  
Satishchandra Ogale
Keyword(s):  
Lead Iodide ◽  
Hybrid Perovskite

scholarly journals An Environmentally Stable Organic–Inorganic Hybrid Perovskite Containing Py Cation with Low Trap-State Density

Crystals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 272
Author(s):  
Alex Fan Xu ◽  
Ryan Taoran Wang ◽  
Lory Wenjuan Yang ◽  
Elton Enchong Liu ◽  
Gu Xu
Keyword(s):  
State Density ◽  
Hexagonal Structure ◽  
Environmental Stability ◽  
Trap State ◽  
X Ray Diffraction ◽  
Lead Iodide ◽  
Casting Method ◽  
Hybrid Perovskite ◽  
Stable Hybrid ◽  
Space Charge Limited Currents

The commonly-employed methylammonium-based perovskites are environmentally unstable, which limits their commercialization. To resolve this problem, a stable hybrid perovskite, pyrrolidinium lead iodide (PyPbI3), was synthesized successfully via a simple drop casting method. The formed PyPbI3 exhibited a hexagonal structure. It presented not only excellent phase stability, but also low trap-state density, as confirmed via the X-ray diffraction and space-charge-limited currents measurements. This novel perovskite may be applicable to perovskite photovoltaics to improve their environmental stability.

scholarly journals A Water-Stable Organic-Inorganic Hybrid Perovskite for Solar Cells by Inorganic Passivation

Crystals ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 83 ◽  
Author(s):  
Edward Guangqing Tai ◽  
Ryan Taoran Wang ◽  
Jason Yuanzhe Chen ◽  
Gu Xu
Keyword(s):  
Solar Cells ◽  
Uv Light ◽  
Perovskite Solar Cells ◽  
Transport Layer ◽  
Bandgap Energy ◽  
Lead Iodide ◽  
Perovskite Layer ◽  
Rapid Degradation ◽  
Inorganic Hybrid ◽  
Hybrid Perovskite

Organic-inorganic hybrid halide perovskite solar cells (PSCs) have been a trending topic in recent years. Significant progress has been made to increase their power conversion efficiency (PCE) to more than 20%. However, the poor stability of PSCs in both working and non-working conditions results in rapid degradation through multiple environmental erosions such as water, heat, and UV light. Attempts have been made to resolve the rapid-degradation problems, including formula changes, transport layer improvements, and encapsulations, but none of these have effectively resolved the dilemma. This paper reports our findings on adding inorganic films as surface-passivation layers on top of the hybrid perovskite materials, which not only enhance stability by eliminating weak sites but also prevent water penetration by using a water-stable layer. The surface-passivated hybrid perovskite layer indicates a slight increase of bandgap energy (Eg=1.76 eV), compared to the original methylammonium lead iodide (MAPbI3, Eg=1.61 eV) layer, allowing for more stable perovskite layer with a small sacrifice in the photoluminescence property, which represents a lower charge diffusion rate and higher bandgap energy. Our finding offers an alternative approach to resolving the low stability issue for PSC fabrication.

scholarly journals Structure and interstitial iodide migration in hybrid perovskite methylammonium lead iodide

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
J. L. Minns ◽  
P. Zajdel ◽  
D. Chernyshov ◽  
W. van Beek ◽  
M. A. Green
Keyword(s):  
Lead Iodide ◽  
Hybrid Perovskite ◽  
Methylammonium Lead Iodide
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