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Robust estimation of charge carrier diffusivity using transient photoluminescence microscopy

Journal Article · · Journal of Chemical Physics
DOI:https://doi.org/10.1063/5.0100075· OSTI ID:1979128
Transient microscopy has emerged as a powerful tool for imaging the diffusion of excitons and free charge carriers in optoelectronic materials. In many excitonic materials, extraction of diffusion coefficients can be simplified because of the linear relationship between signal intensity and local excited state population. However, in materials where transport is dominated by free charge carriers, extracting diffusivities accurately from multidimensional data is complicated by the nonlinear dependence of the measured signal on the local charge carrier density. To obtain accurate estimates of charge carrier diffusivity from transient microscopy data, statistically robust fitting algorithms coupled to efficient 3D numerical solvers that faithfully relate local carrier dynamics to raw experimental measurables are sometimes needed. Here, we provide a detailed numerical framework for modeling the spatiotemporal dynamics of free charge carriers in bulk semiconductors with significant solving speed reduction and for simulating the corresponding transient photoluminescence microscopy data. To demonstrate the utility of this approach, we apply a fitting algorithm using a Markov chain Monte Carlo sampler to experimental data on bulk CdS and methylammonium lead bromide (MAPbBr3) crystals. Parameter analyses reveal that transient photoluminescence microscopy can be used to obtain robust estimates of charge carrier diffusivities in optoelectronic materials of interest, but that other experimental approaches should be used for obtaining carrier recombination constants. Additionally, simplifications can be made to the fitting model depending on the experimental conditions and material systems studied. Our open-source simulation code and fitting algorithm are made freely available to the scientific community.
Research Organization:
Massachusetts Institute of Technology (MIT), Cambridge, MA (United States)
Sponsoring Organization:
MathWorks Engineering Fellowship; USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0019345
OSTI ID:
1979128
Alternate ID(s):
OSTI ID: 1887299
Journal Information:
Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 10 Vol. 157; ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

References (56)

Intrinsic Charge Transport across Phase Transitions in Hybrid Organo-Inorganic Perovskites journal May 2016
Introduction to Evolutionary Computing book January 2003
�ber die partiellen Differenzengleichungen der mathematischen Physik journal December 1928
Picosecond transient grating measurements of singlet exciton transport in anthracene single crystals journal April 1984
Determination of the anisotropic ambipolar diffusion coefficient of CdS at room temperature journal June 1994
Pump–probe microscopy: Visualization and spectroscopy of ultrafast dynamics at the nanoscale journal September 2015
Optical nonlinearities and photo-excited carrier lifetime in CdS at 532 nm journal April 2001
Recombination in Semiconductors book January 2009
Markov Chain Monte Carlo Sampling for Target Analysis of Transient Absorption Spectra journal March 2019
Comparison of Recombination Dynamics in CH 3 NH 3 PbBr 3 and CH 3 NH 3 PbI 3 Perovskite Films: Influence of Exciton Binding Energy journal November 2015
Photon Reabsorption Masks Intrinsic Bimolecular Charge-Carrier Recombination in CH 3 NH 3 PbI 3 Perovskite journal August 2017
Long-Range Exciton Diffusion in Two-Dimensional Assemblies of Cesium Lead Bromide Perovskite Nanocrystals journal May 2020
Interlayer Exciton Transport in MoSe2/WSe2 Heterostructures journal January 2021
Impact of Photon Recycling, Grain Boundaries, and Nonlinear Recombination on Energy Transport in Semiconductors journal December 2021
Direct Characterization of Carrier Diffusion in Halide-Perovskite Thin Films Using Transient Photoluminescence Imaging journal August 2019
Introduction to Organic Thin Film Transistors and Design of n-Channel Organic Semiconductors journal August 2004
Semiconducting Tin and Lead Iodide Perovskites with Organic Cations: Phase Transitions, High Mobilities, and Near-Infrared Photoluminescent Properties journal July 2013
Determination of Exciton Diffusion Length by Transient Photoluminescence Quenching and Its Application to Quantum Dot Films journal April 2015
Direct Imaging of Free Carrier and Trap Carrier Motion in Silicon Nanowires by Spatially-Separated Femtosecond Pump–Probe Microscopy journal February 2013
Subdiffusive Exciton Transport in Quantum Dot Solids journal May 2014
Extended carrier lifetimes and diffusion in hybrid perovskites revealed by Hall effect and photoconductivity measurements journal August 2016
Visualization of exciton transport in ordered and disordered molecular solids journal April 2014
High-quality bulk hybrid perovskite single crystals within minutes by inverse temperature crystallization journal July 2015
Top and bottom surfaces limit carrier lifetime in lead iodide perovskite films journal January 2017
Tailored exciton diffusion in organic photovoltaic cells for enhanced power conversion efficiency journal November 2012
Efficient metal halide perovskite light-emitting diodes with significantly improved light extraction on nanophotonic substrates journal February 2019
Exciton diffusion in two-dimensional metal-halide perovskites journal April 2020
Imaging material functionality through three-dimensional nanoscale tracking of energy flow journal October 2019
Multi-cation perovskites prevent carrier reflection from grain surfaces journal February 2020
A carrier density dependent diffusion coefficient, recombination rate and diffusion length in MAPbI3 and MAPbBr3 crystals measured under one- and two-photon excitations journal January 2020
Recent progress of metal halide perovskite photodetectors journal January 2017
Exciton diffusion lengths of organic semiconductor thin films measured by spectrally resolved photoluminescence quenching journal March 2009
Optical properties of wurtzite CdS journal July 1995
Characterization of colloidal nanocrystal surface structure using small angle neutron scattering and efficient Bayesian parameter estimation journal June 2019
Diffusion dynamics of valley excitons by transient grating spectroscopy in monolayer WSe 2 journal September 2019
Mechanism of charge transport in self-organizing organic materials journal January 2008
Bayesian methods for cosmological parameter estimation from cosmic microwave background measurements journal June 2001
Beyond Bulk Lifetimes: Insights into Lead Halide Perovskite Films from Time-Resolved Photoluminescence journal October 2016
Exciton Diffusion and Halo Effects in Monolayer Semiconductors journal May 2018
Time-resolved imaging of carrier transport in halide perovskite thin films and evidence for nondiffusive transport journal December 2019
Carrier dynamics in semiconductors studied with time-resolved terahertz spectroscopy journal June 2011
Fast and reliable Markov chain Monte Carlo technique for cosmological parameter estimation journal January 2005
Measurement and simulation of charge diffusion in a small-pixel charge-coupled device journal February 2022
PbSe Nanocrystal Solids for n- and p-Channel Thin Film Field-Effect Transistors journal October 2005
Electron-Hole Diffusion Lengths Exceeding 1 Micrometer in an Organometal Trihalide Perovskite Absorber journal October 2013
Impact of microstructure on local carrier lifetime in perovskite solar cells journal April 2015
Photon recycling in lead iodide perovskite solar cells journal March 2016
Sparse Matrices in MATLAB: Design and Implementation journal January 1992
On the Construction and Comparison of Difference Schemes journal September 1968
Hall Mobility of Holes in CdS Crystals journal January 1965
Ultrafast Dynamic Microscopy of Carrier and Exciton Transport journal June 2019
Spatially Resolved Photogenerated Exciton and Charge Transport in Emerging Semiconductors journal April 2020
Transient optical nonlinearities in CdS studied by laser-induced grating spectroscopy at room temperature journal November 1991
Imaging the extent of plasmon excitation in Au nanowires using pump-probe microscopy journal January 2013
Diffusion-Driven Charge Transport in Light Emitting Devices journal December 2017
Perovskites-Based Solar Cells: A Review of Recent Progress, Materials and Processing Methods journal May 2018

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