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Simplified Models for Accelerated Structural Prediction of Conjugated Semiconducting Polymers

Journal Article · · Journal of Physical Chemistry. C
 [1];  [1];  [2];  [2];  [2];  [2];  [3];  [4];  [2];  [5]
  1. Boise State Univ., ID (United States)
  2. National Renewable Energy Lab. (NREL), Golden, CO (United States)
  3. National Renewable Energy Lab. (NREL), Golden, CO (United States); Macquarie Univ., NSW (Australia)
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  5. National Renewable Energy Lab. (NREL), Golden, CO (United States); Boise State Univ., ID (United States)
We perform molecular dynamics simulations of poly(benzodithiophene-thienopyrrolodione) (BDT-TPD) oligomers in order to evaluate the accuracy with which unoptimized molecular models can predict experimentally characterized morphologies. The predicted morphologies are characterized using simulated grazing-incidence X-ray scattering (GIXS) and compared to the experimental scattering patterns. We find that approximating the aromatic rings in BDT-TPD with rigid bodies, rather than combinations of bond, angle, and dihedral constraints, results in 14% lower computational cost and provides nearly equivalent structural predictions compared to the flexible model case. The predicted glass transition temperature of BDT-TPD (410 +/- 32 K) is found to be in agreement with experiments. Predicted morphologies demonstrate short-range structural order due to stacking of the chain backbones (p-p stacking around 3.9 A), and long-range spatial correlations due to the self-organization of backbone stacks into 'ribbons' (lamellar ordering around 20.9 A), representing the best-to-date computational predictions of structure of complex conjugated oligomers. We find that expensive simulated annealing schedules are not needed to predict experimental structures here, with instantaneous quenches providing nearly equivalent predictions at a fraction of the computational cost of annealing. We therefore suggest utilizing rigid bodies and fast cooling schedules for high-throughput screening studies of semiflexible polymers and oligomers to utilize their significant computational benefits where appropriate.
Research Organization:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S), SunShot National Laboratory Multiyear Partnership (SuNLaMP)
Grant/Contract Number:
AC36-08GO28308
OSTI ID:
1412100
Report Number(s):
NREL/JA--5900-70618
Journal Information:
Journal of Physical Chemistry. C, Journal Name: Journal of Physical Chemistry. C Journal Issue: 47 Vol. 121; ISSN 1932-7447
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

References (62)

Effect of Molecular Weight and Annealing of Poly(3-hexylthiophene)s on the Performance of Organic Field-Effect Transistors journal August 2004
Effects of Thermal Annealing Upon the Morphology of Polymer-Fullerene Blends journal August 2010
Significant Improvement of Dye-Sensitized Solar Cell Performance by Small Structural Modification in π-Conjugated Donor-Acceptor Dyes journal January 2012
The Role of Processing in the Fabrication and Optimization of Plastic Solar Cells journal April 2009
Polymer-Fullerene Bulk-Heterojunction Solar Cells journal August 2010
25th Anniversary Article: A Decade of Organic/Polymeric Photovoltaic Research journal September 2013
25th Anniversary Article: Organic Field-Effect Transistors: The Path Beyond Amorphous Silicon journal January 2014
The Importance of Fullerene Percolation in the Mixed Regions of Polymer-Fullerene Bulk Heterojunction Solar Cells journal October 2012
Solvent Vapor-Induced Nanowire Formation in Poly(3-hexylthiophene) Thin Films: Solvent Vapor-Induced Nanowire Formation in Poly(3-hexylthiophene) Thin Films journal May 2005
VMD: Visual molecular dynamics journal February 1996
Rigid body constraints realized in massively-parallel molecular dynamics on graphics processing units journal November 2011
General purpose molecular dynamics simulations fully implemented on graphics processing units journal May 2008
Ordered conjugated polymer nano- and microstructures: Structure control for improved performance of organic electronics journal December 2014
Fabrication and processing of polymer solar cells: A review of printing and coating techniques journal April 2009
Polymeric solar cells based on P3HT:PCBM: Role of the casting solvent journal December 2011
Molecular Packing and Arrangement Govern the Photo-Oxidative Stability of Organic Photovoltaic Materials journal September 2015
Carpenter’s Rule Folding in Rigid–Flexible Block Copolymers with Conjugation-Interrupting, Flexible Tethers Between Oligophenylenevinylenes journal June 2015
Relating Molecular Morphology to Charge Mobility in Semicrystalline Conjugated Polymers journal February 2016
Benzo[1,2- b :4,5- b ′]dithiophene and Thieno[3,4- c ]pyrrole-4,6-dione Based Donor-π-Acceptor Conjugated Polymers for High Performance Solar Cells by Rational Structure Modulation journal April 2015
Enhanced Computational Sampling of Perylene and Perylothiophene Packing with Rigid-Body Models journal January 2017
Molecular Design of Photovoltaic Materials for Polymer Solar Cells: Toward Suitable Electronic Energy Levels and Broad Absorption journal January 2012
Benzodithiophene and Imide-Based Copolymers for Photovoltaic Applications journal March 2012
Materials and Applications for Large Area Electronics: Solution-Based Approaches journal January 2010
The OPLS [optimized potentials for liquid simulations] potential functions for proteins, energy minimizations for crystals of cyclic peptides and crambin journal March 1988
A Thieno[3,4- c ]pyrrole-4,6-dione-Based Copolymer for Efficient Solar Cells journal April 2010
Scaled Effective Solvent Method for Predicting the Equilibrium Ensemble of Structures with Analysis of Thermodynamic Properties of Amorphous Polyethylene Glycol–Water Mixtures journal January 2013
Transferable Potentials for Phase Equilibria. 1. United-Atom Description of n-Alkanes March 1998
Molecular Dynamics Simulations and Integral Equation Theory of Alkane Chains:  Comparison of Explicit and United Atom Models journal March 2003
Controlling Nanorod Self-Assembly in Polymer Thin Films journal September 2011
Computationally Linking Molecular Features of Conjugated Polymers and Fullerene Derivatives to Bulk Heterojunction Morphology journal June 2013
Controlling the Morphology of Model Conjugated Thiophene Oligomers through Alkyl Side Chain Length, Placement, and Interactions journal April 2014
Mapping of Explicit Atom onto United Atom Potentials journal December 1998
A strong regioregularity effect in self-organizing conjugated polymer films and high-efficiency polythiophene:fullerene solar cells journal February 2006
A general relationship between disorder, aggregation and charge transport in conjugated polymers journal August 2013
Addressing challenges journal July 2014
Solar cells with one-day energy payback for the factories of the future journal January 2012
Lamellar and liquid crystal ordering in solvent-annealed all-conjugated block copolymers journal January 2014
Random D–A 1 –D–A 2 terpolymers based on benzodithiophene, thiadiazole[3,4-e]isoindole-5,7-dione and thieno[3,4-c]pyrrole-4,6-dione for efficient polymer solar cells journal January 2017
Semiconducting polymers: the Third Generation journal January 2010
Upscaling of polymer solar cell fabrication using full roll-to-roll processing journal January 2010
Nanoscale structure measurements for polymer-fullerene photovoltaics journal January 2012
Morphology characterization in organic and hybrid solar cells journal January 2012
New insights into the dynamics and morphology of P3HT:PCBM active layers in bulk heterojunctions journal January 2013
Perspective on the Martini model journal January 2013
Coarse-grained simulations of the solution-phase self-assembly of poly(3-hexylthiophene) nanostructures journal January 2013
Low band-gap donor–acceptor copolymers based on dioxocyclopenta[c]thiophene derivatives as acceptor units: synthesis, properties, and photovoltaic performances journal January 2013
Structure–processing–property correlations in solution-processed, small-molecule, organic solar cells journal January 2013
A comparison of united atom, explicit atom, and coarse-grained simulation models for poly(ethylene oxide) journal June 2006
Relationship between the microscopic morphology and the charge transport properties in poly(3-hexylthiophene) field-effect transistors journal August 2006
A computer simulation method for the calculation of equilibrium constants for the formation of physical clusters of molecules: Application to small water clusters journal January 1982
A comparison of a united atom and an explicit atom model in simulations of polymethylene journal June 1993
Constant pressure molecular dynamics algorithms journal September 1994
An optimized united atom model for simulations of polymethylene melts journal July 1995
Adiabatic path integral molecular dynamics methods. II. Algorithms journal February 1996
Computationally connecting organic photovoltaic performance to atomistic arrangements and bulk morphology journal March 2017
The phase problem of X-ray crystallography journal November 1991
Canonical dynamics: Equilibrium phase-space distributions journal March 1985
Matplotlib: A 2D Graphics Environment journal January 2007
XSEDE: Accelerating Scientific Discovery journal September 2014
Quantum chemical calculation of hole transport properties in crystalline polyethylene journal October 2016
Formulation strategies for optimizing the morphology of polymeric bulk heterojunction organic solar cells: a brief review journal January 2014
Minimal Discrete Energy on the Sphere journal January 1994

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