skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Probing drift velocity dispersion in MAPbI3 photovoltaic cells with nonlinear photocurrent spectroscopy

Journal Article · · Journal of Chemical Physics
DOI:https://doi.org/10.1063/5.0116789· OSTI ID:1896823

Conventional time-of-flight (TOF) measurements yield charge carrier mobilities in photovoltaic cells with time resolution limited by the RC time constant of the device, which is on the order of 0.1–1 µs for the systems targeted in the present work. We have recently developed an alternate TOF method, termed nonlinear photocurrent spectroscopy (NLPC), in which carrier drift velocities are determined with picosecond time resolution by applying a pair of laser pulses to a device with an experimentally controlled delay time. In this technique, carriers photoexcited by the first laser pulse are “probed” by way of recombination processes involving carriers associated with the second laser pulse. Here, we report NLPC measurements conducted with a simplified experimental apparatus in which synchronized 40 ps diode lasers enable delay times up to 100 µs at 5 kHz repetition rates. Carrier mobilities of ∼0.025 cm2/V/s are determined for MAPbI3 photovoltaic cells with active layer thicknesses of 240 and 460 nm using this instrument. Our experiments and model calculations suggest that the nonlinear response of the photocurrent weakens as the carrier densities photoexcited by the first laser pulse trap and broaden while traversing the active layer of a device. Based on this aspect of the signal generation mechanism, experiments conducted with co-propagating and counter-propagating laser beam geometries are leveraged to determine a 60 nm length scale of drift velocity dispersion in MAPbI3 films. Contributions from localized states induced by thermal fluctuations are consistent with drift velocity dispersion on this length scale.

Sponsoring Organization:
USDOE
Grant/Contract Number:
EFRC Center for Hybrid Organic Inorganic Semiconductors for Energy (CHOISE)
OSTI ID:
1896823
Journal Information:
Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Vol. 157 Journal Issue: 17; ISSN 0021-9606
Publisher:
American Institute of PhysicsCopyright Statement
Country of Publication:
United States
Language:
English

References (61)

Redox conditions correlated with vibronic coupling modulate quantum beats in photosynthetic pigment–protein complexes journal November 2021
The Role of Driving Energy and Delocalized States for Charge Separation in Organic Semiconductors journal February 2012
Space-charge-limited electron and hole currents in hybrid organic-inorganic perovskites journal August 2020
Low trap-state density and long carrier diffusion in organolead trihalide perovskite single crystals journal January 2015
Direct Observation of Correlated Triplet Pair Dynamics during Singlet Fission Using Ultrafast Mid-IR Spectroscopy journal January 2018
Coherent two-dimensional photocurrent spectroscopy in a PbS quantum dot photocell journal December 2014
Time-domain photocurrent spectroscopy based on a common-path birefringent interferometer journal December 2020
Drift mobility techniques for the study of electrical transport properties in insulating solids journal April 1969
Multiple-trapping model of anomalous transit-time dispersion in a S e journal November 1977
Identification of Trap States in Perovskite Solar Cells journal June 2015
Differentiation of True Nonlinear and Incoherent Mixing of Linear Signals in Action-Detected 2D Spectroscopy journal April 2019
Complex Refractive Index Spectra of CH 3 NH 3 PbI 3 Perovskite Thin Films Determined by Spectroscopic Ellipsometry and Spectrophotometry journal December 2014
Photogeneration Mechanism and Exciton Binding Energy in Phenylenevinylene Polymers journal January 1997
Electro-optics of perovskite solar cells journal December 2014
Electron and hole drift mobility measurements on methylammonium lead iodide perovskite solar cells journal April 2016
Two-dimensional electronic spectroscopy and photosynthesis: Fundamentals and applications to photosynthetic light-harvesting journal July 2011
Elucidation of Quantum-Well-Specific Carrier Mobilities in Layered Perovskites journal January 2021
Incoherent population mixing contributions to phase-modulation two-dimensional coherent excitation spectra journal September 2017
Electron-hole diffusion lengths > 175 μm in solution-grown CH 3 NH 3 PbI 3 single crystals journal January 2015
Multidimensional coherent photocurrent spectroscopy of a semiconductor nanostructure journal January 2013
Energy transfer mechanisms in layered 2D perovskites journal April 2018
Probing Carrier Transport in Layered Perovskites with Nonlinear Optical and Photocurrent Spectroscopies journal April 2021
Origin of layered perovskite device efficiencies revealed by multidimensional time-of-flight spectroscopy journal February 2022
Precursor States for Charge Carrier Generation in Conjugated Polymers Probed by Ultrafast Spectroscopy journal March 2002
Ultrafast decoherence dynamics govern photocarrier generation efficiencies in polymer solar cells journal July 2016
Photocurrent-Detected 2D Electronic Spectroscopy Reveals Ultrafast Hole Transfer in Operating PM6/Y6 Organic Solar Cells journal April 2021
Photocurrents generated by intense flash illumination journal December 1965
Dynamic disorder in methylammoniumtrihalogenoplumbates (II) observed by millimeter‐wave spectroscopy journal December 1987
Carrier Transport in CH 3 NH 3 PbI 3 Films with Different Thickness for Perovskite Solar Cells journal July 2016
Spatially segregated free-carrier and exciton populations in individual lead halide perovskite grains journal March 2017
Trap States in Lead Iodide Perovskites journal January 2015
A physical interpretation of dispersive transport in disordered semiconductors journal January 1981
Experimental and theoretical optical properties of methylammonium lead halide perovskites journal January 2016
Distinguishing Energy- and Charge-Transfer Processes in Layered Perovskite Quantum Wells with Two-Dimensional Action Spectroscopies journal May 2020
Inter-phase charge and energy transfer in Ruddlesden–Popper 2D perovskites: critical role of the spacing cations journal January 2018
Distance Dependence of Förster Resonance Energy Transfer Rates in 2D Perovskite Quantum Wells via Control of Organic Spacer Length journal March 2021
Ultrafast Exciton Transport with a Long Diffusion Length in Layered Perovskites with Organic Cation Functionalization journal October 2020
Time‐Scale Invariance in Transport and Relaxation journal January 1991
Femtosecond photovoltage excitation cross-correlation on a ladder-type polymer journal June 2000
Imaging Excited State Dynamics in Layered 2D Perovskites with Transient Absorption Microscopy journal November 2019
Dispersive (non-Gaussian) transient transport in disordered solids journal September 1978
Charge-Carrier Dynamics in Organic-Inorganic Metal Halide Perovskites journal May 2016
Thermal fluctuations and carrier localization induced by dynamic disorder in MAPbI3 described by first-principles based tight-binding model journal August 2021
Theory of multiple trapping journal May 1977
Long-Range Balanced Electron- and Hole-Transport Lengths in Organic-Inorganic CH3NH3PbI3 journal October 2013
Imaging Carrier Diffusion in Perovskites with a Diffractive Optic-Based Transient Absorption Microscope journal April 2018
Deciphering the effect of traps on electronic charge transport properties of methylammonium lead tribromide perovskite journal September 2020
Excitonic structure and charge separation in the heliobacterial reaction center probed by multispectral multidimensional spectroscopy journal May 2021
Monte Carlo simulation of anomalous transit-time dispersion of amorphous solids journal March 1977
Origin of apparent light-enhanced and negative capacitance in perovskite solar cells journal April 2019
Characterization of trap states in perovskite films by simultaneous fitting of steady-state and transient photoluminescence measurements journal August 2018
Space Charge and Carrier Trapping Effects on the Transient Photocurrents of Organic Materials Using the Time-of-Flight Technique journal November 2007
Observation of Internal Photoinduced Electron and Hole Separation in Hybrid Two-Dimentional Perovskite Films journal January 2017
Discerning between Exciton and Free-Carrier Behaviors in Ruddlesden–Popper Perovskite Quantum Wells through Kinetic Modeling of Photoluminescence Dynamics journal July 2020
Long-range exciton transport and slow annihilation in two-dimensional hybrid perovskites journal January 2020
Ultrafast Energy Transfer Involving the Red Chlorophylls of Cyanobacterial Photosystem I Probed through Two-Dimensional Electronic Spectroscopy journal August 2018
Direct Correlation of Charge Carrier Transport to Local Crystal Quality in Lead Halide Perovskites journal June 2020
Coherent Two-Dimensional and Broadband Electronic Spectroscopies journal January 2022
Ultrafast Spectroscopy with Photocurrent Detection: Watching Excitonic Optoelectronic Systems at Work journal January 2016
Multidimensional time-of-flight spectroscopy journal June 2021
Electronic coherence lifetimes of the Fenna–Matthews–Olson complex and light harvesting complex II journal January 2019

Similar Records

Origin of layered perovskite device efficiencies revealed by multidimensional time-of-flight spectroscopy
Journal Article · Wed Feb 23 00:00:00 EST 2022 · Journal of Chemical Physics · OSTI ID:1896823

Iodine reduction for reproducible and high-performance perovskite solar cells and modules
Journal Article · Fri Mar 05 00:00:00 EST 2021 · Science Advances · OSTI ID:1896823

Hybrid magnonics in hybrid perovskite antiferromagnets
Journal Article · Sat Apr 01 00:00:00 EDT 2023 · Nature Communications · OSTI ID:1896823

Related Subjects