Solution Phase Exciton Diffusion Dynamics of a Charge-Transfer Copolymer PTB7 and a Homopolymer P3HT

Cho, Sung; Rolczynski, Brian S.; Xu, Tao; Yu, Luping; Chen, Lin X.

doi:10.1021/jp5111345

Solution Phase Exciton Diffusion Dynamics of a Charge-Transfer Copolymer PTB7 and a Homopolymer P3HT

Journal Article · Thu Jun 18 00:00:00 EDT 2015 · Journal of Physical Chemistry. B, Condensed Matter, Materials, Surfaces, Interfaces and Biophysical Chemistry

DOI:https://doi.org/10.1021/jp5111345· OSTI ID:1393970

Cho, Sung; Rolczynski, Brian S.; Xu, Tao; Yu, Luping; Chen, Lin X.

Using ultrafast polarization-controlled transient absorption (TA) measurements, dynamics of the initial exciton states were investigated on the time scale of tens of femtoseconds to about 80 ps in two different types of conjugated polymers extensively used in active layers of organic photovoltaic devices. These polymers are poly(3-fluorothienothiophenebenzodithiophene) (PTB7) and poly-3-hexylthiophene (P3HT), which are charge-transfer polymers and homopolymers, respectively. In PTB7, the initial excitons with excess vibrational energy display two observable ultrafast time constants, corresponding to coherent exciton diffusion before the vibrational relaxation, and followed by incoherent exciton diffusion processes to a neighboring local state after the vibrational relaxation. In contrast, P3HT shows only one exciton diffusion or conformational motion time constant of 34 ps, even though its exciton decay kinetics are multiexponential. Based on the experimental results, an exciton dynamics mechanism is conceived taking into account the excitation energy and structural dependence in coherent and incoherent exciton diffusion processes, as well as other possible deactivation processes including the formation of the pseudo-charge-transfer and charge separate states, as well as interchain exciton hopping or coherent diffusion.

Research Organization:: Argonne National Laboratory (ANL)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

DOE Contract Number:: AC02-06CH11357

OSTI ID:: 1393970

Journal Information:: Journal of Physical Chemistry. B, Condensed Matter, Materials, Surfaces, Interfaces and Biophysical Chemistry, Journal Name: Journal of Physical Chemistry. B, Condensed Matter, Materials, Surfaces, Interfaces and Biophysical Chemistry Journal Issue: 24 Vol. 119; ISSN 1520-6106

Publisher:: American Chemical Society

Country of Publication:: United States

Language:: English

References (37)

Molecular Understanding of Organic Solar Cells: The Challenges Brédas, Jean-Luc; Norton, Joseph E.; Cornil, Jérôme Accounts of Chemical Research, Vol. 42, Issue 11 https://doi.org/10.1021/ar900099h	journal	November 2009
Accurate Force Field Development for Modeling Conjugated Polymers DuBay, Kateri H.; Hall, Michelle Lynn; Hughes, Thomas F. Journal of Chemical Theory and Computation, Vol. 8, Issue 11 https://doi.org/10.1021/ct300175w	journal	October 2012
Fluorescence Up-Conversion Study of Excitation Energy Transport Dynamics in Oligothiophene−Fullerene Linked Dyads Nakamura, Takumi; Araki, Yasuyuki; Ito, Osamu The Journal of Physical Chemistry A, Vol. 112, Issue 6 https://doi.org/10.1021/jp710115z	journal	January 2008
Ultrafast depolarization of the fluorescence in a conjugated polymer Ruseckas, A.; Wood, P.; Samuel, I. D. W. Physical Review B, Vol. 72, Issue 11 https://doi.org/10.1103/PhysRevB.72.115214	journal	September 2005
Strategies for Increasing the Efficiency of Heterojunction Organic Solar Cells: Material Selection and Device Architecture Heremans, Paul; Cheyns, David; Rand, Barry P. Accounts of Chemical Research, Vol. 42, Issue 11 https://doi.org/10.1021/ar9000923	journal	November 2009
Coherence in Metal−Metal-to-Ligand-Charge-Transfer Excited States of a Dimetallic Complex Investigated by Ultrafast Transient Absorption Anisotropy Cho, Sung; Mara, Michael W.; Wang, Xianghuai The Journal of Physical Chemistry A, Vol. 115, Issue 16 https://doi.org/10.1021/jp109174f	journal	April 2011
Exciton migration in a polythiophene: Probing the spatial and energy domain by line-dipole Förster-type energy transfer Westenhoff, Sebastian; Daniel, Clément; Friend, Richard H. The Journal of Chemical Physics, Vol. 122, Issue 9 https://doi.org/10.1063/1.1855292	journal	March 2005
Controlling Conformations of Conjugated Polymers and Small Molecules: The Role of Nonbonding Interactions Jackson, Nicholas E.; Savoie, Brett M.; Kohlstedt, Kevin L. Journal of the American Chemical Society, Vol. 135, Issue 28 https://doi.org/10.1021/ja403667s	journal	May 2013
Polymer Photovoltaic Cells: Enhanced Efficiencies via a Network of Internal Donor-Acceptor Heterojunctions Yu, G.; Gao, J.; Hummelen, J. C. Science, Vol. 270, Issue 5243, p. 1789-1791 https://doi.org/10.1126/science.270.5243.1789	journal	December 1995
For the Bright Future-Bulk Heterojunction Polymer Solar Cells with Power Conversion Efficiency of 7.4% Liang, Yongye; Xu, Zheng; Xia, Jiangbin Advanced Materials, Vol. 22, Issue 20, p. E135-E138 https://doi.org/10.1002/adma.200903528	journal	May 2010
Semiconducting polymers: the Third Generation Heeger, Alan J. Chemical Society Reviews, Vol. 39, Issue 7 https://doi.org/10.1039/b914956m	journal	January 2010
Coherent Intrachain Energy Migration in a Conjugated Polymer at Room Temperature Collini, E.; Scholes, G. D. Science, Vol. 323, Issue 5912 https://doi.org/10.1126/science.1164016	journal	January 2009
Ultrafast Relaxation of the Poly(3-hexylthiophene) Emission Spectrum Banerji, Natalie; Cowan, Sarah; Vauthey, Eric The Journal of Physical Chemistry C, Vol. 115, Issue 19 https://doi.org/10.1021/jp1119348	journal	April 2011
Efficiency of bulk-heterojunction organic solar cells Scharber, M. C.; Sariciftci, N. S. Progress in Polymer Science, Vol. 38, Issue 12 https://doi.org/10.1016/j.progpolymsci.2013.05.001	journal	December 2013
Analysis of the excited states of regioregular polythiophene P3HT Cook, Steffan; Furube, Akihiro; Katoh, Ryuzi Energy & Environmental Science, Vol. 1, Issue 2 https://doi.org/10.1039/b805643a	journal	January 2008
Photoinduced Charge Generation in a Molecular Bulk Heterojunction Material Kaake, Loren G.; Jasieniak, Jacek J.; Bakus, Ronald C. Journal of the American Chemical Society, Vol. 134, Issue 48 https://doi.org/10.1021/ja308949m	journal	November 2012
Nonadiabatic Simulations of Exciton Dissociation in Poly- p -phenylenevinylene Oligomers Bedard-Hearn, Michael J.; Sterpone, Fabio; Rossky, Peter J. The Journal of Physical Chemistry A, Vol. 114, Issue 29 https://doi.org/10.1021/jp103446z	journal	July 2010
Organic Semiconducting Oligomers for Use in Thin Film Transistors Murphy, Amanda R.; Fréchet, Jean M. J. Chemical Reviews, Vol. 107, Issue 4 https://doi.org/10.1021/cr0501386	journal	April 2007
Correlated Exciton Relaxation in Poly(3-hexylthiophene) Wells, Nathan P.; Blank, David A. Physical Review Letters, Vol. 100, Issue 8 https://doi.org/10.1103/PhysRevLett.100.086403	journal	February 2008
Charge Generation and Recombination Dynamics in Poly(3-hexylthiophene)/Fullerene Blend Films with Different Regioregularities and Morphologies Guo, Jiamo; Ohkita, Hideo; Benten, Hiroaki Journal of the American Chemical Society, Vol. 132, Issue 17 https://doi.org/10.1021/ja100302p	journal	May 2010
Ultrafast spectroscopic investigation of a fullerene poly(3-hexylthiophene) dyad Banerji, Natalie; Seifter, Jason; Wang, Mingfeng Physical Review B, Vol. 84, Issue 7 https://doi.org/10.1103/PhysRevB.84.075206	journal	August 2011
Polymer-Fullerene Bulk-Heterojunction Solar Cells Dennler, Gilles; Scharber, Markus C.; Brabec, Christoph J. Advanced Materials, Vol. 21, Issue 13, p. 1323-1338 https://doi.org/10.1002/adma.200801283	journal	April 2009
The path to ubiquitous and low-cost organic electronic appliances on plastic Forrest, Stephen R. Nature, Vol. 428, Issue 6986, p. 911-918 https://doi.org/10.1038/nature02498	journal	April 2004
Photovoltaic Function and Exciton/Charge Transfer Dynamics in a Highly Efficient Semiconducting Copolymer Szarko, Jodi M.; Rolczynski, Brian S.; Lou, Sylvia J. Advanced Functional Materials, Vol. 24, Issue 1 https://doi.org/10.1002/adfm.201301820	journal	July 2013
Ultrafast Intramolecular Exciton Splitting Dynamics in Isolated Low-Band-Gap Polymers and Their Implications in Photovoltaic Materials Design Rolczynski, Brian S.; Szarko, Jodi M.; Son, Hae Jung Journal of the American Chemical Society, Vol. 134, Issue 9 https://doi.org/10.1021/ja209003y	journal	February 2012
Raman Spectroscopic Studies of Regioregular Poly(3-alkylthiophenes) Louarn, Guy; Trznadel, Miroslaw; Buisson, J. P. The Journal of Physical Chemistry, Vol. 100, Issue 30 https://doi.org/10.1021/jp960104p	journal	January 1996
Structure and thermochromic solid-state phase transition of poly (3-alkylthiophene) Tashiro, Kohji; Ono, Keiko; Minagawa, Yasuhisa Journal of Polymer Science Part B: Polymer Physics, Vol. 29, Issue 10 https://doi.org/10.1002/polb.1991.090291007	journal	September 1991
Electroluminescence in conjugated polymers Friend, R. H.; Gymer, R. W.; Holmes, A. B. Nature, Vol. 397, Issue 6715 https://doi.org/10.1038/16393	journal	January 1999
Efficient photodiodes from interpenetrating polymer networks Halls, J. J. M.; Walsh, C. A.; Greenham, N. C. Nature, Vol. 376, Issue 6540, p. 498-500 https://doi.org/10.1038/376498a0	journal	August 1995
Effects of Additives on the Morphology of Solution Phase Aggregates Formed by Active Layer Components of High-Efficiency Organic Solar Cells Lou, Sylvia J.; Szarko, Jodi M.; Xu, Tao Journal of the American Chemical Society, Vol. 133, Issue 51 https://doi.org/10.1021/ja2085564	journal	December 2011
Effects of Exciton Polarity in Charge-Transfer Polymer/PCBM Bulk Heterojunction Films Rolczynski, Brian S.; Szarko, Jodi M.; Son, Hae Jung The Journal of Physical Chemistry Letters, Vol. 5, Issue 11 https://doi.org/10.1021/jz5005957	journal	May 2014
The Limits to Organic Photovoltaic Cell Efficiency Forrest, Stephen R. MRS Bulletin, Vol. 30, Issue 1 https://doi.org/10.1557/mrs2005.5	journal	January 2005
Molecular characterization of poly(3-hexylthiophene) Heffner, Glenn W.; Pearson, Dale S. Macromolecules, Vol. 24, Issue 23 https://doi.org/10.1021/ma00023a035	journal	November 1991
Conjugated Polymer-Based Organic Solar Cells Günes, Serap; Neugebauer, Helmut; Sariciftci, Niyazi Serdar Chemical Reviews, Vol. 107, Issue 4, p. 1324-1338 https://doi.org/10.1021/cr050149z	journal	April 2007
Exciton Formation, Relaxation, and Decay in PCDTBT Banerji, Natalie; Cowan, Sarah; Leclerc, Mario Journal of the American Chemical Society, Vol. 132, Issue 49 https://doi.org/10.1021/ja105290e	journal	December 2010
Femtosecond Time-Resolved Fluorescence Study of P3HT/PCBM Blend Films Xie, Yu; Li, Yong; Xiao, Lixin The Journal of Physical Chemistry C, Vol. 114, Issue 34 https://doi.org/10.1021/jp912288p	journal	August 2010
Excitonic Energy Migration in Conjugated Polymers: The Critical Role of Interchain Morphology Hu, Zhongjian; Adachi, Takuji; Haws, Ryan Journal of the American Chemical Society, Vol. 136, Issue 45 https://doi.org/10.1021/ja508112k	journal	October 2014

Cited By (4)

Push–pull architecture eliminates chain length effects on exciton dissociation Aplan, Melissa P.; Lee, Youngmin; Wilkie, Carly A. Journal of Materials Chemistry A, Vol. 6, Issue 45 https://doi.org/10.1039/c8ta05782f	journal	January 2018
Morphology-dependent performance of thin film organic solar cells Arbab, Elhadi A. A.; Gebremichael, Bizuneh; Kumar, Amit Journal of Modern Optics, Vol. 66, Issue 4 https://doi.org/10.1080/09500340.2018.1534014	journal	October 2018
Preferential Charge Generation at Aggregate Sites in Narrow Band Gap Infrared Photoresponsive Polymer Semiconductors Sulas, Dana B.; London, Alexander E.; Huang, Lifeng Advanced Optical Materials, Vol. 6, Issue 7 https://doi.org/10.1002/adom.201701138	journal	February 2018
Modifying electronic properties of ICBA through chemical substitutions for solar cell applications Oliveira, Eliezer Fernando; Silva, Lucas Castorino; Lavarda, Francisco Carlos Structural Chemistry, Vol. 28, Issue 4 https://doi.org/10.1007/s11224-017-0916-0	journal	February 2017

Similar Records

Solution Phase Exciton Diffusion Dynamics of a Charge-Transfer Copolymer PTB7 and a Homopolymer P3HT

Journal Article · Sun Jan 25 23:00:00 EST 2015 · Journal of Physical Chemistry. B, Condensed Matter, Materials, Surfaces, Interfaces and Biophysical Chemistry · OSTI ID:1210442

The separation of vibrational coherence from ground- and excited-electronic states in P3HT film

Journal Article · Sun Jun 07 00:00:00 EDT 2015 · Journal of Chemical Physics · OSTI ID:22415891

Photoinduced Charge Carrier Generation in a Poly(3-hexylthiophene) and Methanofullerene Bulk Heterojunction Investigated by Time-Resolved Terahertz Spectroscopy

Journal Article · Sat Dec 31 23:00:00 EST 2005 · Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical · OSTI ID:902160

Related Subjects

36 MATERIALS SCIENCE

Solution Phase Exciton Diffusion Dynamics of a Charge-Transfer Copolymer PTB7 and a Homopolymer P3HT

Citation Formats

References (37)

Cited By (4)

Similar Records

Related Subjects