Intrinsic femtosecond charge generation dynamics in a single crystal organometal halide perovskite

Abstract

Hybrid metal-organic perovskite solar cells have astounded the solar cell community with their rapid rise in efficiency over the past three years. Despite this success, the basic processes governing the photogeneration of free charges, particularly their dynamics and efficiency, remain unknown. Here we use ultrabroadband pulses of THz frequency light to see the intrinsic photophysical properties of single crystal lead halide perovskite just femtoseconds after a photon is first absorbed. Our spectra reveal the dynamics and efficiencies of free charge creation, the remarkable ease in which they move through the lattice and the complicated interplay between free and bound charges in these materials.

References in corpus (2)

• Direct Measurement of the Exciton Binding Energy and Effective Masses for Charge carriers in an Organic-Inorganic Tri-halide Perovskite
• Lattice dynamics and vibrational spectra of the orthorhombic, tetragonal and cubic phases of methylammonium lead iodide

Cited by in corpus (23)

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• How optical excitation controls the structure and properties of vanadium dioxide
• Exploiting Electrical Transients to Reveal Charge Loss Mechanism of Junction Solar Cells
• Limits to Electrical Mobility in Lead-Halide Perovskite Semiconductors
• Quantifying Charge Carrier Mobilities and Recombination Rates in Metal Halide Perovskites from Time-Resolved Microwave Photo-conductivity Measurements
• A New Perspective on the Role of A-site Cation in Perovskite Solar Cells
• Giant Fine Structure Splitting of the Bright Exciton in a Bulk MAPbBr${}_3$ Single Crystal
• Modelization of charge carriers mobilities in halide perovskites: Fröhlich scattering and quantum localization effects in a dynamic disorder regime
• Simultaneous observation of free and defect-bound excitons in CH3NH3PbI3 using four-wave mixing spectroscopy
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• Carrier Diffusion in Thin-Film CH3NH3PbI3 Perovskite Measured using Four-Wave Mixing
• Time resolved photoemission spectroscopy of electronic cooling and localization in CH${}_3$NH${}_3$PbI${}_3$ crystals
• Intensity-surged and Bandwidth-extended Terahertz Radiation in Two-foci Cascading Plasmas
• Ultrafast acoustic phonon scattering in CH${}_3$NH${}_3$PbI${}_3$ revealed by femtosecond four-wave mixing
• Free-electron effects on optical absorption of hybrid perovskite CH${}_3$NH${}_3$PbI${}_3$ from first principles
• Unconventional transport in low-density two-dimensional Rashba systems
• Determining Exciton Binding Energy and Reduced Effective Mass in Metal Tri-Halide Perovskites from Optical and Impedance Spectroscopy Measurements
• Hot Carrier Mobility Dynamics Unravel Competing Sub-ps Cooling Processes in Lead Halide Perovskites
• Ultrafast correlated charge and lattice motion in a hybrid metal halide perovskite
• Large Polaron Generation and Dynamics in 3D Metal-Halide Perovskites
• Approximations used in the analysis of signals in pump-probe spectroscopy