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

Title: Direct probe of the nuclear modes limiting charge mobility in molecular semiconductors

Journal Article · · Materials Horizons
DOI:https://doi.org/10.1039/c8mh01069b· OSTI ID:1543809
ORCiD logo [1];  [1];  [2];  [1]; ORCiD logo [1];  [3];  [3];  [4]; ORCiD logo [1];  [3]; ORCiD logo [4]; ORCiD logo [5]; ORCiD logo [3]; ORCiD logo [2]; ORCiD logo [1]; ORCiD logo [1]
  1. Univ. of California, Davis, CA (United States)
  2. Univ. of Liverpool (United Kingdom)
  3. Pennsylvania State Univ., University Park, PA (United States)
  4. Univ. of New Mexico, Albuquerque, NM (United States)
  5. Univ. of Kentucky, Lexington, KY (United States)

Recent theories suggest that low frequency dynamic intramolecular and intermolecular motions in organic semiconductors (OSCs) are critical to determining the hole mobility. So far, however, it has not been possible to probe these motions directly experimentally and therefore no unequivocal and quantitative link exists between molecular-scale thermal disorder and macroscale hole mobility in OSCs. Here we use inelastic neutron scattering to probe thermal disorder directly by measuring the phonon spectrum in six different small molecule OSCs, which we accurately reproduce with first principles simulations. We use the simulated phonons to generate a set of electron–phonon coupling parameters. Using these parameters, the theoretical mobility is in excellent agreement with macroscopic measurements. Comparison of mobility between different materials reveals routes to improve mobility by engineering phonon and electron–phonon coupling.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Univ. of California, Oakland, CA (United States); Univ. of California, Davis, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); European Research Council (ERC); Engineering and Physical Sciences Research Council (EPSRC); Dow Chemical Company; RFair; National Science Foundation (NSF)
Grant/Contract Number:
AC02-05CH11231; SC0010419; EP/N021754/2
OSTI ID:
1543809
Alternate ID(s):
OSTI ID: 1479824
Journal Information:
Materials Horizons, Vol. 6, Issue 1; ISSN 2051-6347
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 42 works
Citation information provided by
Web of Science

References (47)

How intermolecular geometrical disorder affects the molecular doping of donor–acceptor copolymers journal March 2015
The path to ubiquitous and low-cost organic electronic appliances on plastic journal April 2004
Identifying Atomic Scale Structure in Undoped/Doped Semicrystalline P3HT Using Inelastic Neutron Scattering journal March 2017
Resonance Raman Spectroscopic- and Photocurrent Imaging of Polythiophene/Fullerene Solar Cells journal November 2009
Reversible adsorption of nitrogen dioxide within a robust porous metal–organic framework journal June 2018
Probing polymorphs of organic semiconductors by lattice phonon Raman microscopy journal January 2008
Infrared and Raman spectroscopy of organic thin films used for electronic devices journal May 2012
Understanding the Crystal Packing and Organic Thin-Film Transistor Performance in Isomeric Guest-Host Systems journal April 2017
Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set journal July 1996
Synthesis, Properties, Crystal Structures, and Semiconductor Characteristics of Naphtho[1,2- b :5,6- b ′]dithiophene and -diselenophene Derivatives journal February 2010
The Transient Localization Scenario for Charge Transport in Crystalline Organic Materials journal January 2016
Band-like temperature dependence of mobility in a solution-processed organic semiconductor journal August 2010
aCLIMAX 4.0.1, The new version of the software for analyzing and interpreting INS spectra journal March 2004
Development of Novel Conjugated Donor Polymers for High-Efficiency Bulk-Heterojunction Photovoltaic Devices journal November 2009
Functionalized Pentacene:  Improved Electronic Properties from Control of Solid-State Order journal September 2001
Functionalized Acenes and Heteroacenes for Organic Electronics journal December 2006
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set journal October 1996
First principles phonon calculations in materials science journal November 2015
From ultrasoft pseudopotentials to the projector augmented-wave method journal January 1999
White organic light-emitting diodes with fluorescent tube efficiency journal May 2009
Revisiting electronic couplings and incoherent hopping models for electron transport in crystalline C60 at ambient temperatures journal January 2012
Stable, Crystalline Acenedithiophenes with up to Seven Linearly Fused Rings journal September 2004
A map of high-mobility molecular semiconductors journal September 2017
Resolution of VISION, a crystal-analyzer spectrometer
  • Seeger, Philip A.; Daemen, Luke L.; Larese, John Z.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 604, Issue 3 https://doi.org/10.1016/j.nima.2009.03.204
journal June 2009
Reducing dynamic disorder in small-molecule organic semiconductors by suppressing large-amplitude thermal motions journal February 2016
Molecular Ordering of High-Performance Soluble Molecular Semiconductors and Re-evaluation of Their Field-Effect Transistor Characteristics journal July 2008
Decoherence and energy relaxation in the quantum-classical dynamics for charge transport in organic semiconducting crystals: An instantaneous decoherence correction approach journal July 2015
n-Channel Semiconductor Materials Design for Organic Complementary Circuits journal July 2011
Multi-Scale Approach to Non-Adiabatic Charge Transport in High-Mobility Organic Semiconductors journal October 2015
High Mobility Field-Effect Transistors with Versatile Processing from a Small-Molecule Organic Semiconductor journal April 2013
Interaction of Charge Carriers with Lattice Vibrations in Organic Molecular Semiconductors: Naphthalene as a Case Study journal February 2009
High mobility solution processed 6,13-bis(triisopropyl-silylethynyl) pentacene organic thin film transistors journal August 2007
Vibrational spectroscopy with neutrons: Recent developments journal February 2018
Organic Field-Effect Transistors from Solution-Deposited Functionalized Acenes with Mobilities as High as 1 cm 2 /V·s journal April 2005
Crossover from band-like to thermally activated charge transport in organic transistors due to strain-induced traps journal July 2017
Multi-colour organic light-emitting displays by solution processing journal February 2003
Triisopropylsilylethynyl-functionalized anthradithiophene derivatives for solution processable organic field effect transistors journal July 2012
Charge Transport in Molecular Materials: An Assessment of Computational Methods journal June 2017
Understanding the breathing phenomena in nano-ZIF-7 upon gas adsorption journal January 2017
Optical gap in herringbone and π-stacked crystals of [1]benzothieno[3,2-b]benzothiophene and its brominated derivative journal January 2014
25th Anniversary Article: Organic Field-Effect Transistors: The Path Beyond Amorphous Silicon journal January 2014
Charge transport in organic molecular semiconductors from first principles: The bandlike hole mobility in a naphthalene crystal journal March 2018
White Organic Light-Emitting Diodes with Fluorescent Tube Efficiency journal January 2009
Functionalized Acenes and Heteroacenes for Organic Electronics journal May 2007
Reducing Dzyaloshinskii-Moriya interaction and field-free spin-orbit torque switching in synthetic antiferromagnets journal May 2021
High-resolution X-ray luminescence extension imaging journal February 2021
First principles phonon calculations in materials science preprint January 2015

Cited By (8)

Chasing the “Killer” Phonon Mode for the Rational Design of Low‐Disorder, High‐Mobility Molecular Semiconductors journal September 2019
A Large Anisotropic Enhancement of the Charge Carrier Mobility of Flexible Organic Transistors with Strain: A Hall Effect and Raman Study journal November 2019
Neutron Spectroscopy: An Under‐Utilised Tool for Organic Electronics Research? journal April 2019
Neutron Spectroscopy: An Under‐Utilised Tool for Organic Electronics Research? journal July 2019
Explaining different experimental hole mobilities: influence of polymorphism on dynamic disorder in pentacene journal January 2019
Chasing the ‘Killer’ Phonon Mode for the Rational Design of Low Disorder, High Mobility Molecular Semiconductors text January 2019
Chasing the killer phonon mode for the rational design of low disorder, high mobility molecular semiconductors text January 2019
On dynamical localization corrections to band transport text January 2019