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

Title: Investigating the effect of electric fields on lead halide perovskites by scanning tunneling microscopy

Journal Article · · Journal of Applied Physics
DOI:https://doi.org/10.1063/5.0011735· OSTI ID:1671776
ORCiD logo [1];  [2];  [2]; ORCiD logo [3]
  1. Florida State Univ., Tallahassee, FL (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
  3. Florida State Univ., Tallahassee, FL (United States)

Lead halide perovskites have emerged as promising absorber materials over the last decade to increase the efficiency of photovoltaics beyond its current limits. However, to further optimize the performance of perovskites, more detailed studies need to be performed which allow for the correlation of film morphology and local electronic properties at the nanoscale. In this paper, we present a scanning tunneling microscopy (STM) approach to probe the effect of an applied electric field of a methylammonium formamidinium lead triiodide perovskite thin film on the film response by current-voltage spectroscopy, current imaging tunneling spectroscopy, differential conductance mapping and X-ray absorption spectroscopy (XAS) by means of synchrotron X-ray STM (SX-STM). We find a strong correlation between the measurement conditions and the obtained current-voltage characteristics when imaging under opposite applied bias polarities. In particular, we find similarities to already observed poling effects for perovskites which result in either a positively or negatively charged interface due to ion and vacancy migration. Our results provide insight into the influence of measurement conditions such as bias polarity on the performance assessment of perovskite thin films by STM.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division; Florida State University
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1671776
Alternate ID(s):
OSTI ID: 1668883
Journal Information:
Journal of Applied Physics, Vol. 128, Issue 12; ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

References (62)

Ionic transport in hybrid lead iodide perovskite solar cells journal June 2015
Interpretation of inverted photocurrent transients in organic lead halide perovskite solar cells: proof of the field screening by mobile ions and determination of the space charge layer widths journal January 2017
Elemental Fingerprinting of Materials with Sensitivity at the Atomic Limit journal October 2014
Critical Role of Grain Boundaries for Ion Migration in Formamidinium and Methylammonium Lead Halide Perovskite Solar Cells journal May 2016
Enhanced charge carrier mobility and lifetime suppress hysteresis and improve efficiency in planar perovskite solar cells journal January 2018
Recombination in Perovskite Solar Cells: Significance of Grain Boundaries, Interface Traps, and Defect Ions journal April 2017
Atomic Structures of CH 3 NH 3 PbI 3 (001) Surfaces journal December 2015
Homogenized halides and alkali cation segregation in alloyed organic-inorganic perovskites journal February 2019
Precharging Photon Upconversion: Interfacial Interactions in Solution-Processed Perovskite Upconversion Devices journal January 2020
Grain boundary dominated ion migration in polycrystalline organic–inorganic halide perovskite films journal January 2016
Defect migration in methylammonium lead iodide and its role in perovskite solar cell operation journal January 2015
Transient Sub-Band-Gap States at Grain Boundaries of CH 3 NH 3 PbI 3 Perovskite Act as Fast Temperature Relaxation Centers journal June 2019
Giant switchable photovoltaic effect in organometal trihalide perovskite devices journal December 2014
Hybrid Organic–Inorganic Perovskites on the Move journal February 2016
Combining scanning tunneling microscopy and synchrotron radiation for high-resolution imaging and spectroscopy with chemical, electronic, and magnetic contrast journal January 2012
Structural and electronic properties of the Bi/GaP(110) interface journal May 1991
Ion Migration in Organometal Trihalide Perovskite and Its Impact on Photovoltaic Efficiency and Stability journal January 2016
Metal Halide Perovskites as Mixed Electronic–Ionic Conductors: Challenges and Opportunities—From Hysteresis to Memristivity journal June 2017
Transient Sub-bandgap States in Halide Perovskite Thin Films journal January 2018
Plasmonic support-mediated activation of 1 nm platinum clusters for catalysis journal January 2017
Photodriven Dipole Reordering: Key to Carrier Separation in Metalorganic Halide Perovskites journal March 2019
Surface and Interface Aspects of Organometal Halide Perovskite Materials and Solar Cells journal November 2016
Valence and Conduction Band Densities of States of Metal Halide Perovskites: A Combined Experimental–Theoretical Study journal June 2016
Predicting the Open-Circuit Voltage of CH 3 NH 3 PbI 3 Perovskite Solar Cells Using Electroluminescence and Photovoltaic Quantum Efficiency Spectra: the Role of Radiative and Non-Radiative Recombination journal September 2014
Band Tailing and Deep Defect States in CH 3 NH 3 Pb(I 1– x Br x ) 3 Perovskites As Revealed by Sub-Bandgap Photocurrent journal February 2017
Electron-hole diffusion lengths > 175 μm in solution-grown CH 3 NH 3 PbI 3 single crystals journal January 2015
XTIP – the world's first beamline dedicated to the synchrotron X-ray scanning tunneling microscopy technique journal April 2020
Unraveling the Impact of Halide Mixing on Perovskite Stability journal January 2019
Transparent Metal Films for Detection of Single-Molecule Optical Absorption by Scanning Tunneling Microscopy journal June 2014
Microscopic Investigation of Grain Boundaries in Organolead Halide Perovskite Solar Cells journal December 2015
Electronic Structure of the Si(111)2 × 1 Surface by Scanning-Tunneling Microscopy journal November 1986
Atomistic Origins of Surface Defects in CH 3 NH 3 PbBr 3 Perovskite and Their Electronic Structures journal February 2017
Optoelectronic Switching of a Carbon Nanotube Chiral Junction Imaged with Nanometer Spatial Resolution journal September 2015
Influence of Triplet Diffusion on Lead Halide Perovskite-Sensitized Solid-State Upconversion journal June 2019
How the formation of interfacial charge causes hysteresis in perovskite solar cells journal January 2018
Benefit of Grain Boundaries in Organic–Inorganic Halide Planar Perovskite Solar Cells journal February 2015
Real-Time Nanoscale Open-Circuit Voltage Dynamics of Perovskite Solar Cells journal March 2017
Halide Heterogeneity Affects Local Charge Carrier Dynamics in Mixed-Ion Lead Perovskite Thin Films journal April 2019
Microscopic Charge Transport and Recombination Processes behind the Photoelectric Hysteresis in Perovskite Solar Cells journal August 2016
Surface Restructuring of Hybrid Perovskite Crystals journal November 2016
Lattice dynamics and vibrational spectra of the orthorhombic, tetragonal, and cubic phases of methylammonium lead iodide journal October 2015
Precursor Concentration Affects Grain Size, Crystal Orientation, and Local Performance in Mixed-Ion Lead Perovskite Solar Cells journal October 2018
Anharmonicity and Disorder in the Black Phases of Cesium Lead Iodide Used for Stable Inorganic Perovskite Solar Cells journal March 2018
Triplet Sensitization by Lead Halide Perovskite Thin Films for Efficient Solid-State Photon Upconversion at Subsolar Fluxes journal September 2019
The Mechanism of Slow Hot-Hole Cooling in Lead-Iodide Perovskite: First-Principles Calculation on Carrier Lifetime from Electron–Phonon Interaction journal April 2015
Electron-Hole Diffusion Lengths Exceeding 1 Micrometer in an Organometal Trihalide Perovskite Absorber journal October 2013
Long-Range Balanced Electron- and Hole-Transport Lengths in Organic-Inorganic CH3NH3PbI3 journal October 2013
Facet-dependent photovoltaic efficiency variations in single grains of hybrid halide perovskite journal July 2016
Hole Trapping by Iodine Interstitial Defects Decreases Free Carrier Losses in Perovskite Solar Cells: A Time-Domain Ab Initio Study journal May 2017
Probing Semiconductor Properties with Optical Scanning Tunneling Microscopy journal March 2020
Imaging Excited Orbitals of Quantum Dots: Experiment and Electronic Structure Theory journal November 2015
Gwyddion: an open-source software for SPM data analysis journal January 2012
Verification and mitigation of ion migration in perovskite solar cells journal April 2019
A mixed-cation lead mixed-halide perovskite absorber for tandem solar cells journal January 2016
Anomalous photovoltaic effect in organic-inorganic hybrid perovskite solar cells journal March 2017
Mapping the Photoresponse of CH 3 NH 3 PbI 3 Hybrid Perovskite Thin Films at the Nanoscale journal May 2016
Parameters Affecting IV Hysteresis of CH 3 NH 3 PbI 3 Perovskite Solar Cells: Effects of Perovskite Crystal Size and Mesoporous TiO 2 Layer journal August 2014
Growth and interfacial structure of methylammonium lead iodide thin films on Au(111) journal February 2017
Hybrid Organic-Inorganic Perovskites (HOIPs): Opportunities and Challenges journal July 2015
Fermi-level pinning in methylammonium lead iodide perovskites journal January 2019
Termination Dependence of Tetragonal CH 3 NH 3 PbI 3 Surfaces for Perovskite Solar Cells journal August 2014
Real-Space Imaging of the Atomic Structure of Organic–Inorganic Perovskite journal December 2015