Photoinduced Dynamics of Charge Separation: From Photosynthesis to Polymer-Fullerene Bulk Heterojunctions

Journal of Physical Chemistry B

Volumn 119, Issue 24, 2015, Pages 7407-7416

  Niklas, Jens ^a   Beaupré, Serge ^b   Leclerc, Mario ^b   Xu, Tao ^c   Yu, Luping ^c   Sperlich, Andreas ^d   Dyakonov, Vladimir ^d   Poluektov, Oleg G ^a  

^a ARGONNE NATIONAL LABORATORY   (United States)

^b UNIVERSITÉ LAVAL   (Canada)

^c UNIVERSITY OF CHICAGO   (United States)

^d UNIVERSITY OF WÜRZBURG   (Germany)

Author keywords

[No Author keywords available]

Indexed keywords

CHARGE TRANSFER; COPOLYMERS; ELECTRON SPECTROSCOPY; FULLERENES; HETEROJUNCTIONS; INTERFACE STATES; MAGNETIC RESONANCE; ORGANIC POLYMERS; PARAMAGNETIC RESONANCE; POLYMER BLENDS; POLYMERS; SEPARATION; SOLAR CELLS; SPIN POLARIZATION;

ARTIFICIAL PHOTOSYNTHETIC ASSEMBLY; CHARGE SEPARATION PROCESS; CHARGE TRANSFER STATE; DONOR-ACCEPTOR INTERFACES; ELECTRON PARAMAGNETIC RESONANCE SPECTROSCOPY; ORGANIC PHOTOVOLTAIC MATERIALS; PHOTOINDUCED DYNAMICS; POLYMER-FULLERENE BLENDS;

ELECTRON SPIN RESONANCE SPECTROSCOPY;

FULLERENE DERIVATIVE; POLYMER;

CHEMICAL STRUCTURE; CHEMISTRY; ELECTRON SPIN RESONANCE; ELECTRON TRANSPORT; PHOTOSYNTHESIS; QUANTUM THEORY; RADIATION RESPONSE;

ELECTRON SPIN RESONANCE SPECTROSCOPY; ELECTRON TRANSPORT; FULLERENES; MOLECULAR STRUCTURE; PHOTOSYNTHESIS; POLYMERS; QUANTUM THEORY;

EID: 84934984724     PISSN: 15206106     EISSN: 15205207     Source Type: Journal    
DOI: 10.1021/jp511021v     Document Type: Article

References (99)

1. Blankenship, R. E. Molecular Mechanisms of Photosynthesis. Blackwell Science Limited: Oxford, 2002.
2. Fleming, G. R.; Schlau-Cohen, G. S.; Amarnath, K.; Zaks, J. Design Principles of Photosynthetic Light-Harvesting Faraday Discuss. 2012, 155, 27-41
3. Brettel, K. Electron Transfer and Arrangement of the Redox Cofactors in Photosystem I Biochim. Biophys. Acta-Bioenerg. 1997, 1318, 322-373
4. Golbeck, J. H., Ed. Photosystem I: The Light-Driven Plastocyanin:Ferredoxin Oxidoreductase; Springer: Dordrecht, The Netherlands, 2006; Vol. 24.
5. Wydrzynski, T. J.; Satoh, K., Eds. Photosystem II - The Light-Driven Water:Plastoquinone Oxidoreductase; Springer: Dordrecht, The Netherlands, 2005; Vol. 22.
6. Heinnickel, M.; Golbeck, J. H. Heliobacterial Photosynthesis Photosynth. Res. 2007, 92, 35-53
7. Green, M. A.; Emery, K.; Hishikawa, Y.; Warta, W.; Dunlop, E. D. Solar Cell Efficiency Tables (version 44) Prog. Photovoltaics 2014, 22, 701-710
8. Deibel, C.; Dyakonov, V. Polymer-Fullerene Bulk Heterojunction Solar Cells Rep. Prog. Phys. 2010, 73, 096401
9. Schlenker, C.; Thompson, M. E. Current Challenges in Organic Photovoltaic Solar Energy Conversion - Unimolecular and Supramolecular Electronics I.; Springer: Berlin/Heidelberg, 2012; Vol. 312, pp 175-212.
10. Clarke, T. M.; Durrant, J. R. Charge Photogeneration in Organic Solar Cells Chem. Rev. 2010, 110, 6736-6767
11. Hains, A. W.; Liang, Z. Q.; Woodhouse, M. A.; Gregg, B. A. Molecular Semiconductors in Organic Photovoltaic Cells Chem. Rev. 2010, 110, 6689-6735
12. Bredas, J. L.; Street, G. B. Polarons, Bipolarons, and Solitons in Conducting Polymers Acc. Chem. Res. 1985, 18, 309-315
13. Marcus, R. A. Electron Transfer Reactions in Chemistry. Theory and Experiment Rev. Mod. Phys. 1993, 65, 599-610
14. Marcus, R. A.; Sutin, N. Electron Transfer in Chemistry and Biology Biochim. Biophys. Acta 1985, 811, 265-322
15. Newton, M. D.; Sutin, N. Electron Transfer Reactions in Condensed Phases Annu. Rev. Phys. Chem. 1984, 35, 437-480
16. Newton, M. D. Quantum Chemical Probes of Electron-Transfer Kinetics: The Nature of Donor-Acceptor Interactions Chem. Rev. 1991, 91, 767-792
17. Closs, G. L.; Miller, J. R. Intramolecular Long-Distance Electron Transfer in Organic Molecules Science 1988, 240, 440-447
18. Closs, G. L.; Calcaterra, L. T.; Green, N. J.; Penfield, K. W.; Miller, J. R. Distance, Stereoelectronic Effects, and the Marcus Inverted Region in Intramolecular Electron Transfer in Organic Radical Anions J. Phys. Chem. 1986, 90, 3673-3683
19. Miller, J. R.; Calcaterra, L. T.; Closs, G. L. Intramolecular Long-Distance Electron Transfer in Radical Anions. The Effects of Free Energy and Solvent on the Reaction Rates J. Am. Chem. Soc. 1984, 106, 3047-3049
20. Gray, H. B.; Winkler, J. R. Electron Transfer in Proteins Annu. Rev. Biochem. 1996, 65, 537-561
21. Page, C. C.; Moser, C. C.; Chen, X. X.; Dutton, P. L. Natural Engineering Principles of Electron Tunnelling in Biological Oxidation-Reduction Nature 1999, 402, 47-52
22. Moser, C. C.; Keske, J. M.; Warncke, K.; Farid, R. S.; Dutton, P. L. Nature of Biological Electron-Transfer Nature 1992, 355, 796-802
23. Wasielewski, M. R. Photoinduced Electron-Transfer in Supramolecular Systems for Artificial Photosynthesis Chem. Rev. 1992, 92, 435-461
24. Miller, A.; Abrahams, E. Impurity Conduction at Low Concentrations Phys. Rev. 1960, 120, 745-755
25. Lubitz, W.; Lendzian, F.; Bittl, R. Radicals, Radical Pairs and Triplet States in Photosynthesis Acc. Chem. Res. 2002, 35, 313-320
26. Stehlik, D.; Möbius, K. New EPR Methods for Investigating Photoprocesses with Paramagnetic Intermediates Annu. Rev. Phys. Chem. 1997, 48, 745-784
27. Levanon, H.; Möbius, K. Advanced EPR Spectroscopy on Electron Transfer Processes in Photosynthesis and Biomimetic Model Systems Annu. Rev. Biophys. Biomol. Struct. 1997, 26, 495-540
28. Bittl, R.; Kawamori, A. Configuration of Electron Transfer Components Studied by EPR Spectroscopy. In Photosystem II: The Light-Driven Water:Plastoquinone Oxido-Reductase, Wydrzynski, T. J.; Satoh, K., Eds.; Springer: Dordrecht, 2005; Vol. 22, pp 389-402.
29. Kothe, G.; Thurnauer, M. C. What you get out of High-Time Resolution Electron Paramagnetic Resonance: Example from Photosynthetic Bacteria Photosynth. Res. 2009, 102, 349-365
30. Savitsky, A.; Möbius, K. High-field EPR Photosynth. Res. 2009, 102, 311-333
31. van der Est, A. Transient EPR: Using Spin Polarization in Sequential Radical Pairs to study Electron Transfer in Photosynthesis Photosynth. Res. 2009, 102, 335-347
32. De Ceuster, J.; Goovaerts, E.; Bouwen, A.; Hummelen, J. C.; Dyakonov, V. High-frequency (95 GHz) Electron Paramagnetic Resonance Study of the Photoinduced Charge Transfer in conjugated Polymer-Fullerene Composites Phys. Rev. B 2001, 64, 195206
33. Poluektov, O. G.; Niklas, J.; Mardis, K. L.; Beaupre, S.; Leclerc, M.; Villegas, C.; Erten-Ela, S.; Delgado, J. L.; Martin, N.; Sperlich, A. Electronic Structure of Fullerene Heterodimer in Bulk-Heterojunction Blends Adv. Energy Mater. 2014, 1301517
34. Niklas, J.; Mardis, K. L.; Banks, B. P.; Grooms, G. M.; Sperlich, A.; Dyakonov, V.; Beaupre, S.; Leclerc, M.; Xu, T.; Yu, L. Highly-Efficient Charge Separation and Polaron Delocalization in Polymer-Fullerene Bulk-Heterojunctions: A Comparative Multi-Frequency EPR and DFT Study Phys. Chem. Chem. Phys. 2013, 15, 9562-9574
35. Forbes, M. D. E.; Jarocha, L. E.; Sim, S.; Tarasov, V. F. Time-Resolved Electron Paramagnetic Resonance Spectroscopy: History, Technique, and Application to Supramolecular and Macromolecular Chemistry. In Advances in Physical Organic Chemistry; Williams, I. H.; Williams, N. H., Eds.; Elsevier Academic Press Inc.: San Diego, 2013; Vol. 47, pp 1-83.
36. Bittl, R.; Weber, S. Transient Radical Pairs studied by Time-Resolved EPR Biochim. Biophys. Acta - Bioenerg. 2005, 1707, 117-126
37. Chen, T. A.; Rieke, R. D. The 1st Regioregular Head-to-Tail Poly(3-Hexylthiophene-2,5-Diyl) and a Regiorandom Isopolymer: Ni vs Pd Catalysis of 2(5)-Bromo-5(2)-(Bromozincio)-3-Hexylthiophene Polymerization J. Am. Chem. Soc. 1992, 114, 10087-10088
38. Chen, T. A.; Wu, X. M.; Rieke, R. D. Regiocontrolled Synthesis of Poly(3-Alkylthiophenes) Mediated by Rieke Zinc - Their Characterization and Solid-State Properties J. Am. Chem. Soc. 1995, 117, 233-244
39. Blouin, N.; Michaud, A.; Leclerc, M. A low-bandgap Poly(2,7-carbazole) Derivative for use in High-Performance Solar Cells Adv. Mater. 2007, 19, 2295-2300
40. Blouin, N.; Michaud, A.; Gendron, D.; Wakim, S.; Blair, E.; Neagu-Plesu, R.; Belletete, M.; Durocher, G.; Tao, Y.; Leclerc, M. Toward a Rational Design of poly(2,7-carbazole) Derivatives for Solar Cells J. Am. Chem. Soc. 2008, 130, 732-742
41. Liang, Y. Y.; Xu, Z.; Xia, J. B.; Tsai, S. T.; Wu, Y.; Li, G.; Ray, C.; Yu, L. P. For the Bright Future-Bulk Heterojunction Polymer Solar Cells with Power Conversion Efficiency of 7.4% Adv. Mater. 2010, 22, E135-E138
42. Hummelen, J. C.; Knight, B. W.; Lepeq, F.; Wudl, F.; Yao, J.; Wilkins, C. L. Preparation and Characterization of Fulleroid and Methanofullerene Derivatives J. Org. Chem. 1995, 60, 532-538
43. Hore, P. J. Analysis of Polarized Electron Paramagnetic Resonance Spectra. In Advanced EPR-Applications in Biology and Biochemistry; Hoff, A. J., Ed.; Elsevier: Amsterdam, 1989; pp 405-440.
44. Buckley, C. D.; Hunter, D. A.; Hore, P. J.; McLauchlan, K. A. Electron Spin Resonance of Spin-Correlated Radical Pairs Chem. Phys. Lett. 1987, 135, 307-312
45. Hore, P. J.; Hunter, D. A.; McKie, C. D.; Hoff, A. J. Electron Paramagnetic Resonance of Spin-Correlated Radical Pairs in Photosynthetic Reactions Chem. Phys. Lett. 1987, 137, 495-500
46. Poluektov, O. G.; Utschig, L. M.; Schlesselman, S. L.; Lakshmi, K. V.; Brudvig, G. W.; Kothe, G.; Thurnauer, M. C. Electronic Structure of the P700 Special Pair from High-Frequency Electron Paramagnetic Resonance Spectroscopy J. Phys. Chem. B 2002, 106, 8911-8916
47. Bresgunov, A. Y.; Dubinskii, A. A.; Krimov, V. N.; Petrov, Y. G.; Poluektov, O. G.; Lebedev, Y. S. Pulsed EPR in 2-mm Band Appl. Magn. Reson. 1991, 2, 715-728
48. Sperlich, A.; Kraus, H.; Deibel, C.; Blok, H.; Schmidt, J.; Dyakonov, V. Reversible and Irreversible Interactions of Poly(3-hexylthiophene) with Oxygen Studied by Spin-Sensitive Methods J. Phys. Chem. B 2011, 115, 13513-13518
49. Aguirre, A.; Meskers, S. C. J.; Janssen, R. A. J.; Egelhaaf, H. J. Formation of Metastable Charges as a First Step in Photoinduced Degradation in I-conjugated Polymer: Fullerene Blends for Photovoltaic Applications Org. Electron. 2011, 12, 1657-1662
50. Cook, S.; Furube, A.; Katoh, R. Matter of Minutes Degradation of Poly(3-hexylthiophene) under Illumination in Air J. Mater. Chem. 2012, 22, 4282-4289
51. Jorgensen, M.; Norrman, K.; Gevorgyan, S. A.; Tromholt, T.; Andreasen, B.; Krebs, F. C. Stability of Polymer Solar Cells Adv. Mater. 2012, 24, 580-612
52. Stoll, S.; Schweiger, A. EasySpin, a Comprehensive Software Package for Spectral Simulation and Analysis in EPR J. Magn. Reson. 2006, 178, 42-55
53. Aguirre, A.; Gast, P.; Orlinskii, S.; Akimoto, I.; Groenen, E. J. J.; El Mkami, H.; Goovaerts, E.; Van Doorslaer, S. Multifrequency EPR Analysis of the Positive Polaron in I2-doped Poly(3-hexylthiophene) and in Poly[2-methoxy-5-(3,7-dimethyloctyloxy)]-1,4-phenylenevinylene Phys. Chem. Chem. Phys. 2008, 10, 7129-7138
54. Poluektov, O. G.; Filippone, S.; Martin, N.; Sperlich, A.; Deibel, C.; Dyakonov, V. Spin Signatures of Photogenerated Radical Anions in Polymer-[70]Fullerene Bulk Heterojunctions: High Frequency Pulsed EPR Spectroscopy J. Phys. Chem. B 2010, 114, 14426-14429
55. Liedtke, M.; Sperlich, A.; Kraus, H.; Deibel, C.; Dyakonov, V.; Filippone, S.; Delgado, J. L.; Martín, N.; Poluektov, O. G. Spectroscopic Signatures of Photogenerated Radical Anions in Polymer-[C70]Fullerene Bulk Heterojunctions ECS Trans. 2010, 28, 3-10
56. Primak, W. Kinetics of Processes Distributed in Activation Energy Phys. Rev. 1955, 100, 1677-1689
57. Goldanskii, V. I.; Kozhushner, M. A.; Trakhtenberg, L. I. Polychronic Kinetics of Chemical Reactions with the Blending of Rate Constants J. Phys. Chem. B 1997, 101, 10024-10027
58. Kirchartz, T.; Nelson, J. Meaning of Reaction Orders in Polymer: Fullerene Solar Cells Phys. Rev. B 2012, 86, 12
59. Gorenflot, J.; Heiber, M. C.; Baumann, A.; Lorrmann, J.; Gunz, M.; Kampgen, A.; Dyakonov, V.; Deibel, C. Nongeminate Recombination in Neat P3HT and P3HT:PCBM Blend Films J. Appl. Phys. 2014, 115, 9
60. Lukina, E. A.; Uvarov, M. N.; Kulik, L. V. Charge Recombination in P3HT/PC70BM Composite Studied by Light-Induced EPR J. Phys. Chem. C 2014, 118, 18307-18314
61. Kraffert, F.; Steyrleuthner, R.; Albrecht, S.; Neher, D.; Scharber, M. C.; Bittl, R.; Behrends, J. Charge Separation in PCPDTBT:PCBM Blends from an EPR Perspective J. Phys. Chem. C 2014, 118, 28482-28493
62. Pasimeni, L.; Franco, L.; Ruzzi, M.; Mucci, A.; Schenetti, L.; Luo, C.; Guldi, D. M.; Kordatos, K.; Prato, M. Evidence of High Charge Mobility in Photoirradiated Polythiophene-Fullerene Composites J. Mater. Chem. 2001, 11, 981-983
63. Pasimeni, L.; Ruzzi, M.; Prato, M.; Da Ros, T.; Barbarella, G.; Zambianchi, M. Spin Correlated Radical Ion Pairs Generated by Photoinduced Electron Transfer in Composites of Sexithiophene/Fullerene Derivatives: a Transient EPR study Chem. Phys. 2001, 263, 83-94
64. Behrends, J.; Sperlich, A.; Schnegg, A.; Biskup, T.; Teutloff, C.; Lips, K.; Dyakonov, V.; Bittl, R. Direct Detection of Photoinduced Charge Transfer Complexes in Polymer Fullerene Blends Phys. Rev. B 2012, 85 125206
65. Ikoma, T.; Akiyama, K.; Tero-Kubota, S. Carrier Generation in Photoconductive Poly(N-vinylearbazole) as Revealed by Multifrequency Time-Resolved ESR Phys. Rev. B 2005, 71, 13
66. Kaptein, R.; Oosterhoff, L. Chemically Induced Dynamic Nuclear Polarization. II. Relation with Anomalous ESR Spectra Chem. Phys. Lett. 1969, 4, 195-197
67. Muus, L. T.; Atkins, P. W.; McLauchlan, K. A.; Pedersen, J. B., Eds.; Chemically Induced Magnetic Polarization.; D. Reidel: Dordrecht, The Netherlands, 1977; Vol. 34.
68. Closs, G. L. A Mechanism Explaining Nuclear Spin Polarizations in Radical Combination Reactions J. Am. Chem. Soc. 1969, 91, 4552-4554
69. Hoff, A. J.; Gast, P.; Romijn, J. C. Time-Resolved ESR and Chemically-Induced Dynamic Electron Polarization of Primary Reaction in a Reaction Center Particle of Rhodopseudomonas Sphaeroides Wild Type at Low Temperature FEBS Lett. 1977, 73, 185-190
70. Dobbs, A. J. Experimental Observations of Chemically-Induced Dynamic Electron Polarization (CIDEP) Mol. Phys. 1975, 30, 1073-1084
71. Lepley, A. R.; Closs, G. L. Chemically Induced Magnetic Polarization; Wiley: New York, 1973.
72. Salikhov, K. M.; Molin, Y. N.; Sagdeev, R. Z.; Buchachenko, A. L. Spin Polarization and Magnetic Effects in Radical Reactions; Elsevier: Amsterdam, The Netherlands, 1984.
73. Thurnauer, M. C.; Norris, J. R. An Electron Spin Echo Phase Shift Observed in Photosynthetic Algae. Possible Evidence for dynamic Radical Pair Interactions Chem. Phys. Lett. 1980, 76, 557-561
74. Stehlik, D.; Bock, C. H.; Petersen, J. Anisotropic Electron Spin Polarization of Correlated Spin Pairs in Photosynthetic Reaction Centers J. Phys. Chem. 1989, 93, 1612-1619
75. Closs, G. L.; Forbes, M. D. E.; Norris, J. R. Spin-Polarized Electron Paramagnetic Resonance Spectra of Radical Pairs in Micelles. Observation of Electron Spin Spin Interactions J. Phys. Chem. 1987, 91, 3592-3599
76. Kandrashkin, Y.; van der Est, A. A New Approach to Determining the Geometry of Weakly Coupled Radical Pairs from their Electron Spin Polarization Patterns Spectroc. Acta Pt. A-Mol. Biomol. Spectr. 2001, 57, 1697-1709
77. Dubinski, A. A.; Perekhodtsev, G. D.; Poluektov, O. G.; Rajh, T.; Thurnauer, M. C. Analytical Treatment of EPR Spectra of Weakly Coupled Spin-Correlated Radical Pairs in Disordered Solids: Application to the Charge-Separated State in TiO2 Nanoparticles J. Phys. Chem. B 2002, 106, 938-944
78. Calvo, R.; Isaacson, R. A.; Abresch, E. C.; Okamura, M. Y.; Feher, G. Spin-Lattice Relaxation of Coupled Metal-Radical Spin-Dimers in Proteins: Application to Fe2+-cofactor (QA, QB,) Dimers in Reaction Centers from Photosynthetic Bacteria Biophys. J. 2002, 83, 2440-2456
79. Morris, A. L.; Snyder, S. W.; Zhang, Y. N.; Tang, J.; Thurnauer, M. C.; Dutton, P. L.; Robertson, D. E.; Gunner, M. R. Electron-Spin Polarization Model Applied to Sequential Electron-Transfer in Iron-Containing Photosynthetic Bacterial Reaction Centers with Different Quinones as QA J. Phys. Chem. 1995, 99, 3854-3866
80. Kandrashkin, Y. E.; Salikhov, K. M.; van der Est, A.; Stehlik, D. Electron Spin Polarization in Consecutive Spin-Correlated Radical Pairs: Application to Short-Lived and Long-Lived Precursors in Type 1 Photosynthetic Reaction Centres Appl. Magn. Reson. 1998, 15, 417-447
81. Norris, J. R.; Morris, A. L.; Thurnauer, M. C.; Tang, J. A General Model of Electron-Spin Polarization Arising from the Interactions within Radical Pairs J. Chem. Phys. 1990, 92, 4239-4249
82. Tang, J.; Bondeson, S.; Thurnauer, M. C. Effects of Sequential Electron Transfer on Electron Spin Polarized Transient EPR Spectra at High Fields Chem. Phys. Lett. 1996, 253, 293-298
83. Hore, P. J. Transfer of spin correlation between radical pairs in the initial steps of photosynthetic energy conversion Mol. Phys. 1996, 89, 1195-1202
84. Tang, J.; Utschig, L. M.; Poluektov, O.; Thurnauer, M. C. Transient W-band EPR Study of Sequential Electron Transfer in Photosynthetic Bacterial Reaction Centers J. Phys. Chem. B 1999, 103, 5145-5150
85. Hulsebosch, R. J.; Borovykh, I. V.; Paschenko, S. V.; Gast, P.; Hoff, A. J. Radical Pair Dynamics and Interactions in Quinone-Reconstituted Photosynthetic Reaction Centers of Rb. sphaeroides R26: A Multifrequency Magnetic Resonance Study J. Phys. Chem. B 1999, 103, 6815-6823
86. Jordan, P.; Fromme, P.; Witt, H. T.; Klukas, O.; Saenger, W.; Krauss, N. Three-Dimensional Structure of Cyanobacterial Photosystem I at 2.5 Å Resolution Nature 2001, 411, 909-917
87. Bittl, R.; Zech, S. G. Pulsed EPR spectroscopy on short-lived intermediates in photosystem I Biochim. Biophys. Acta 2001, 1507, 194-211
88. Bittl, R.; Zech, S. G. Pulsed EPR Study of Spin-Coupled Radical Pairs in Photosynthetic Reaction Centers: Measurement of the Distance between P700.+ and A1.- in Photosystem I and between P865.+ and QA.- in Bacterial Reaction Centers J. Phys. Chem. B 1997, 101, 1429-1436
89. Budil, D. E.; Thurnauer, M. C. The Chlorophyll Triplet State as a Probe of Structure and Function in Photosynthesis Biochim. Biophys. Acta 1991, 1057, 1-41
90. Thurnauer, M. C.; Katz, J. J.; Norris, J. R. The Triplet State in Bacterial Photosynthesis: Possible Mechanisms of Primary Photo-Act Proc. Natl. Acad. Sci. U.S.A. 1975, 72, 3270-3274
91. Hoff, A. J.; Deisenhofer, J. Photophysics of Photosynthesis. Structure and Spectroscopy of Reaction Centers of Purple Bacteria Phys. Rep. 1997, 287, 1-247
92. Paschenko, S. V.; Gast, P.; Hoff, A. J. A D-Band (130 GHz) EPR Study of the Primary Electron Donor Triplet State in Photosynthetic Reaction Centers of Rhodobacter sphaeroides R26 Appl. Magn. Reson. 2001, 21, 325-334
93. Grancini, G.; De Bastiani, M.; Martino, N.; Fazzi, D.; Egelhaaf, H. J.; Sauermann, T.; Antognazza, M. R.; Lanzani, G.; Caironi, M.; Franco, L. The Critical Role of Interfacial Dynamics in the Stability of Organic Photovoltaic Devices Phys. Chem. Chem. Phys. 2014, 16, 8294-8300
94. Tedlla, B. Z.; Zhu, F.; Cox, M.; Drijkoningen, J.; Manca, J.; Koopmans, B.; Goovaerts, E. Understanding Triplet Formation Pathways in Bulk Heterojunction Polymer:Fullerene Photovoltaic Devices Adv. Energy Mater. 2014, 4, 1401109
95. Szarko, J. M.; Guo, J.; Liang, Y.; Lee, B.; Rolczynski, B. S.; Strzalka, J.; Xu, T.; Loser, S.; Marks, T. J.; Yu, L. When Function Follows Form: Effects of Donor Copolymer Side Chains on Film Morphology and BHJ Solar Cell Performance Adv. Mater. 2010, 22, 5468-5472
96. Bakulin, A. A.; Rao, A.; Pavelyev, V. G.; van Loosdrecht, P. H.; Pshenichnikov, M. S.; Niedzialek, D.; Cornil, J.; Beljonne, D.; Friend, R. H. The Role of Driving Energy and Delocalized States for Charge Separation in Organic Semiconductors Science 2012, 335, 1340-1344
97. Deibel, C.; Strobel, T.; Dyakonov, V. Origin of the Efficient Polaron-Pair Dissociation in Polymer-Fullerene Blends Phys. Rev. Lett. 2009, 103, 036402
98. Gregg, B. A. Entropy of Charge Separation in Organic Photovoltaic Cells: The Benefit of Higher Dimensionality J. Phys. Chem. Lett. 2011, 2, 3013-3015
99. Rao, A.; Chow, P. C. Y.; Gelinas, S.; Schlenker, C. W.; Li, C. Z.; Yip, H. L.; Jen, A. K. Y.; Ginger, D. S.; Friend, R. H. The Role of Spin in the Kinetic Control of Recombination in Organic Photovoltaics Nature 2013, 500, 435-440