Hybrid perovskites
Elucidating Methylamonium and Cesium based Hybrid Perovskites' Dielectric Properties using Ab Initio Calculations and Ellipsometry Measurements
... arthur.marronnier@polytechnique.edu Methylamonium lead halide perovskite materials have emerged over the past five years as absorber layers for new high efficiency yet low cost solar cells that combine the advantages of ...
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Analysis of Multivalley and Multibandgap Absorption and Enhancement of Free Carriers Related to Exciton Screening in Hybrid Perovskites
... iodine is substituted by chlorine (-25%), leading to restricted molecular motion. 28 Thus, the drop in dielectric constant is larger for iodine-based compounds. It shows up in different Lorentz local field factors ...
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Theoretical insights into multibandgap hybrid perovskites for photovoltaic applications
... Tremendous progress has been made recently toward high efficient solar cells and optoelectronic devices using hybrid perovskites materials. Recent experimental studies showed that the mixed halide CH 3 NH 3 ...
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Density of States Broadening in CH 3 NH 3 PbI 3 Hybrid Perovskites Understood from ab initio Molecular Dynamics Simulations
... ergy difference between DOS peaks deep within the VB are on the order of up to 0.5 eV, a substantial change in either atomic orientation or electronic distribution must occur in order to justify the wide range of ...
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Understanding Quantum Confinement of Charge Carriers in Layered 2D Hybrid Perovskites
... 16 effective masses and envelope functions have been carefully investigated as they are at the heart of standard models aiming to simulate quantum confinement in heterostructures having a type-I band alignment. It is ...
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Multinuclear NMR as a tool for studying local order and dynamics in CH3NH3PbX3 (X = Cl, Br, I) hybrid perovskites
... There are major interests in using 207 Pb NMR as a probe in the present context of hybrid perovskites. Even though the materials used for practical applications contain various chemical substitutions on the ...
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Dielectric properties of hybrid perovskites and drift-diffusion modeling of perovskite cells
... Citation: L. Pedesseau ; M. Kepenekian ; D. Sapori ; Y. Huang ; A. Rolland, A. Beck ; C. Cornet ; O. Durand ; S. Wang ; C. Katan ; J. Even, " Dielectric properties of hybrid perovskites and ...
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Theoretical insights into multibandgap hybrid perovskites for photovoltaic applications
... This paper reviews some of the recent theoretical investigations on the Rashba Dresselhaus spin effects and dielectric properties of CH3NH3PbI3 hybrid perovskites and CsPbI3 all-inorganic perovskites ...
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Using Monovalent- to Trivalent-Cation Hybrid Perovskites for Producing High-Efficiency Solar Cells: Electrical Response, Impedance, and Stability
... Organic-inorganic hybrid perovskites (OIHP) mix both organic and inorganic components and have the ABX 3 general formula, with A a monovalent cation, B a divalent metal cation and X a halide ...
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Composite Nature of Layered Hybrid Perovskites: Assessment on Quantum and Dielectric Confinements and Band Alignment
... Layered hybrid organic-inorganic perovskites (HOPs) have re-emerged as potential technological solutions for next generation photovoltaic and optoelectronic ...2D hybrid perovskites and expect ...
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Interplay of spin-orbit coupling and lattice distortion in metal substituted 3D tri-chloride hybrid perovskites
... For hybrid perovskites (as well as all-inorganic perovskites) spin-orbit coupling and many-body effects are of paramount importance to achieve an accurate description of the physical ...
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Carrier scattering processes and low energy phonon spectroscopy in hybrid perovskites crystals
... + and Γ 3 + IR, respectively. The cubic to tetragonal phase transition thus presents an improper ferroelastic character. Next, we performed inelastic neutron scattering measurements around the (2,0,0) main Bragg peak of ...
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Theoretical insights into hybrid perovskites for photovoltaic applications
... 3D hybrid perovskites (HOP) that combine concepts developed for classical bulk solid-state physics and empirical simulations of their optoelectronic ...
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Direct evidence of weakly dispersed and strongly anharmonic optical phonons in hybrid perovskites
... (FAPB), MAPbI 3 (MAPI), and α-FAPbI 3 (FAPI). MA and FA stand for MA and FA molecules, respectively. All single crystals of typical size of 200 mm 3 for all compounds (except for FAPI where only a volume of ~50 mm 3 ...
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Molecular disorder and translation/rotation coupling in the plastic crystal phase of hybrid perovskites
... 1. Introduction Having demonstrated the first truly low-cost photovoltaic devices with more than 20% conversion e fficiency, hybrid organic perovskites (HOP) are currently a phenomenal scienti- fic and ...
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Charge Carrier Dynamics in Two-Dimensional Hybrid Perovskites: Dion-Jacobson vs. Ruddlesden-Popper Phases
... DJ-phase perovskites significantly limits intrinsic non-radiative recombi- nation ...DJ-phase perovskites potentially suitable for various optoelectronic ...DJ-phase perovskites to strategically tune ...
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Influence of π -conjugated cations and halogen substitution on the optoelectronic and excitonic properties of layered hybrid perovskites
... layered hybrid halide perovskite structures allows for the design of hybrid semiconductor quantum wells with tailored room temperature excitonic optical absorption, emission, and charge carriers transport ...
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Tuning electronic structure in layered hybrid perovskites with organic spacer substitution
... to the distance between donor and acceptor species compared, for example, to the Dexter mechanism, vanishing transition dipole moments of T 1 states of organic molecules effectively rule out this scenario. However, the ...
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Control of crystal symmetry breaking with halogen substituted benzylammonium in layered hybrid metal-halide perovskites
... regions in momentum space with opposite sign, i.e. they show spin-selective transport. The Rashba effect arises in materials with strong spin-orbit coupling due to the presence of a non-centrosymmetric potential in the ...
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Electronic properties of 2D and 3D hybrid organic/inorganic perovskites for optoelectronic and photovoltaic applications
... 5. Summary Based on DFT calculations and symmetry analyses of the band-edge states, the electronic and optical properties of both 2D and 3D lead-halide hybrid perovskites have been investigated. In these ...
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