Development of polymer acceptors for organic photovoltaic cells

Polymers

Volumn 6, Issue 1, 2014, Pages 382-407

  Kim, Yujeong ^a   Lim, Eunhee ^a  

^a Kyonggi University   (South Korea)

Author keywords

All polymer solar cells; Organic photovoltaic cells; Polymer acceptors

Indexed keywords

NAPHTHALENE; PHOTOELECTROCHEMICAL CELLS; PHOTOVOLTAIC CELLS; SOLAR CELLS;

ALL-POLYMER SOLAR CELLS; DIKETOPYRROLOPYRROLES; HIGH ELECTRON AFFINITIES; HIGH ELECTRON MOBILITY; NAPHTHALENE DIIMIDE; ORGANIC PHOTOVOLTAIC CELL (OPVS); ORGANIC PHOTOVOLTAIC CELLS; POWER CONVERSION EFFICIENCIES;

POLYMERS;

EID: 84894030338     PISSN: None     EISSN: 20734360     Source Type: Journal    
DOI: 10.3390/polym6020382     Document Type: Review

References (89)

1. Parida, B.; Iniyan, S.; Goic, R. A review of solar photovoltaic technologies. Renew. Sust. Energ. Rev. 2011, 15, 1625-1636
2. Dou, L.; You, J.; Hong, Z.; Xu, Z.; Li, G.; Street, R.A.; Yang, Y. 25th Anniversary Article: A Decade of Organic/Polymeric Photovoltaic Research. Adv. Mater. 2013, 25, 6642-6671
3. Yue, D.; Khatav, P.; You, F.; Darling, S.B. Deciphering the uncertainties in life cycle energy and environmental analysis of organic photovoltaics. Energ. Environ. Sci. 2012, 5, 9163-9172
4. Darling, S.B.; You, F. The case for organic photovoltaics. RSC Adv. 2013, 3, 17633-17648
5. Boudreault, P.-L.T.; Najari, A.; Leclerc, M. Processable Low-Bandgap Polymers for Photovoltaic Applications. Chem. Mater. 2010, 23, 456-469
6. Liao, H.-C.; Ho, C.-C.; Chang, C.-Y.; Jao, M.-H.; Darling, S.B.; Su, W.-F. Additives for morphology control in high-efficiency organic solar cells. Mater. Today 2013, 16, 326-336
7. You, J.; Dou, L.; Hong, Z.; Li, G.; Yang, Y. Recent trends in polymer tandem solar cells research. Prog. Polym. Sci. 2013, 38, 1909-1928
8. Chen, L.-M.; Hong, Z.; Li, G.; Yang, Y. Recent Progress in Polymer Solar Cells: Manipulation of Polymer: Fullerene Morphology and the Formation of Efficient Inverted Polymer Solar Cells. Adv. Mater. 2009, 21, 1434-1449
9. Yi, C.; Gong, X. Towards high performance inverted polymer solar cells. Curr. Opin. Chem. Eng. 2013, 2, 125-131
10. Chen, W.; Nikiforov, M.P.; Darling, S.B. Morphology characterization in organic and hybrid solar cells. Energ. Environ. Sci. 2012, 5, 8045-8074
11. Nikiforov, M.P.; Lai, B.; Chen, W.; Chen, S.; Schaller, R.D.; Strzalka, J.; Maser, J.; Darling, S.B. Detection and role of trace impurities in high-performance organic solar cells. Energ. Environ. Sci. 2013, 6, 1513-1520
12. Heliatek. Available online: http://www.heliatek.com/ (accessed on 7 February 2014)
13. Tang, C.W. Twolayer organic photovoltaic cell. Appl. Phys. Lett. 1986, 48, 183-185
14. Jenekhe, S.A.; Yi, S. Efficient photovoltaic cells from semiconducting polymer heterojunctions. Appl. Phys. Lett. 2000, 77, 2635-2637
15. Granstrom, M.; Petritsch, K.; Arias, A.C.; Lux, A.; Andersson, M.R.; Friend, R.H. Laminated fabrication of polymeric photovoltaic diodes. Nature 1998, 395, 257-260
16. Yu, G.; Gao, J.; Hummelen, J.C.; Wudl, F.; Heeger, A.J. Polymer Photovoltaic Cells: Enhanced Efficiencies via a Network of Internal Donor-Acceptor Heterojunctions. Science 1995, 270, 1789-1791
17. Lee, J.K.; Ma, W.L.; Brabec, C.J.; Yuen, J.; Moon, J.S.; Kim, J.Y.; Lee, K.; Bazan, G.C.; Heeger, A.J. Processing Additives for Improved Efficiency from Bulk Heterojunction Solar Cells. J. Am. Chem. Soc. 2008, 130, 3619-3623
18. Zhicai, H.; Chengmei, Z.; Shijian, S.; Miao, X.; Hongbin, W.; Yong, C. Enhanced power-conversion efficiency in polymer solar cells using an inverted device structure. Nat. Photonics 2012, 6, 591-595
19. Guo, X.; Baumgarten, M.; Müllen, K. Designing π-conjugated polymers for organic electronics. Prog. Polym. Sci. 2013, 38, 1832-1908.
20. Zhu, Z.; Waller, D.; Gaudiana, R.; Morana, M.; Mühlbacher, D.; Scharber, M.; Brabec, C. Panchromatic Conjugated Polymers Containing Alternating Donor/Acceptor Units for Photovoltaic Applications. Macromolecules 2007, 40, 1981-1986
21. Hou, J.; Chen, H.-Y.; Zhang, S.; Li, G.; Yang, Y. Synthesis, Characterization, and Photovoltaic Properties of a Low Band Gap Polymer Based on Silole-Containing Polythiophenes and 2,1,3-Benzothiadiazole. J. Am. Chem. Soc. 2008, 130, 16144-16145
22. Dou, L.; Chen, C.-C.; Yoshimura, K.; Ohya, K.; Chang, W.-H.; Gao, J.; Liu, Y.; Richard, E.; Yang, Y. Synthesis of 5H-Dithieno[3,2-b:2′,3′-d]pyran as an Electron-Rich Building Block for Donor-Acceptor Type Low-Bandgap Polymers. Macromolecules 2013, 46, 3384-3390
23. Zhou, J.; Zuo, Y.; Wan, X.; Long, G.; Zhang, Q.; Ni, W.; Liu, Y.; Li, Z.; He, G.; Li, C.; Kan, B.; Li, M.; Chen, Y. Solution-Processed and High-Performance Organic Solar Cells Using Small Molecules with a Benzodithiophene Unit. J. Am. Chem. Soc. 2013, 135, 8484-8487
24. Sonar, P.; Fong Lim, J.P.; Chan, K.L. Organic non-fullerene acceptors for organic photovoltaics. Energ. Environ. Sci. 2011, 4, 1558-1574
25. Lin, Y.; Li, Y.; Zhan, X. Small molecule semiconductors for high-efficiency organic photovoltaics. Chem. Soc. Rev. 2012, 41, 4245-4272
26. Kozma, E.; Catellani, M. Perylene diimides based materials for organic solar cells. Dyes Pigm. 2013, 98, 160-179
27. Qu, S.; Tian, H. Diketopyrrolopyrrole (DPP)-based materials for organic photovoltaics. Chem. Commun. 2012, 48, 3039-3051
28. Cheng, P.; Ye, L.; Zhao, X.; Hou, J.; Li, Y.; Zhan, X. Binary additives synergistically boost the efficiency of all-polymer solar cells up to 3.45%. Energ. Environ. Sci. 2014, doi:10.1039/c3ee43041c
29. Zhang, X.; Lu, Z.; Ye, L.; Zhan, C.; Hou, J.; Zhang, S.; Jiang, B.; Zhao, Y.; Huang, J.; Zhang, S.; Liu, Y.; Shi, Q.; Liu, Y.; Yao, J. A Potential Perylene Diimide Dimer-Based Acceptor Material for Highly Efficient Solution-Processed Non-Fullerene Organic Solar Cells with 4.03% Efficiency. Adv. Mater. 2013, 25, 5791-5797
30. Facchetti, A. Polymer donor-polymer acceptor (all-polymer) solar cells. Mater. Today 2013, 16, 123-132
31. Darling, S.B. Block copolymers for photovoltaics. Energ. Environ. Sci. 2009, 2, 1266-1273
32. Segalman, R.A.; McCulloch, B.; Kirmayer, S.; Urban, J.J. Block Copolymers for Organic Optoelectronics. Macromolecules 2009, 42, 9205-9216
33. Bang, J.; Jeong, U.; Ryu, D.Y.; Russell, T.P.; Hawker, C.J. Block Copolymer Nanolithography: Translation of Molecular Level Control to Nanoscale Patterns. Adv. Mater. 2009, 21, 4769-4792
34. Sommer, M.; Huettner, S.; Thelakkat, M. Donor-acceptor block copolymers for photovoltaic applications. J. Mater. Chem. 2010, 20, 10788-10797
35. Zhang, Q.; Cirpan, A.; Russell, T.P.; Emrick, T. Donor-Acceptor Poly(thiophene-block-perylene diimide) Copolymers: Synthesis and Solar Cell Fabrication. Macromolecules 2009, 42, 1079-1082
36. Sommer, M.; Hüttner, S.; Steiner, U.; Thelakkat, M. Influence of molecular weight on the solar cell performance of double-crystalline donor-acceptor block copolymers. Appl. Phys. Lett. 2009, 95, 183308:1-183308:3.
37. Nakabayashi, K.; Mori, H. All-Polymer Solar Cells Based on Fully Conjugated Block Copolymers Composed of Poly(3-hexylthiophene) and Poly(naphthalene bisimide) Segments. Macromolecules 2012, 45, 9618-9625
38. Guo, C.; Lin, Y.-H.; Witman, M.D.; Smith, K.A.; Wang, C.; Hexemer, A.; Strzalka, J.; Gomez, E.D.; Verduzco, R. Conjugated Block Copolymer Photovoltaics with near 3% Efficiency through Microphase Separation. Nano Lett. 2013, 13, 2957-2963
39. Zhou, W.; Zhang, Z.-G.; Ma, L.; Li, Y.; Zhan, X. Dithienocoronene diimide based conjugated polymers as electron acceptors for all-polymer solar cells. Sol. Energ. Mat. Sol. C. 2013, 112, 13-19
40. Sommer, M. Conjugated polymers based on naphthalene diimide for organic electronics. J. Mater. Chem. C 2014, doi:10.1039/c3tc31755b
41. Zhan, X.; Tan, Z.; Domercq, B.; An, Z.; Zhang, X.; Barlow, S.; Li, Y.; Zhu, D.; Kippelen, B.; Marder, S.R. A High-Mobility Electron-Transport Polymer with Broad Absorption and Its Use in Field-Effect Transistors and All-Polymer Solar Cells. J. Am. Chem. Soc. 2007, 129, 7246-7247
42. Tan, Z.; Zhou, E.; Zhan, X.; Wang, X.; Li, Y.; Barlow, S.; Marder, S.R. Efficient all-polymer solar cells based on blend of tris(thienylenevinylene)-substituted polythiophene and poly[perylene diimide-alt-bis(dithienothiophene)]. Appl. Phys. Lett. 2008, 93, 073309:1-073309:3
43. Zhan, X.; Tan, Z.; Zhou, E.; Li, Y.; Misra, R.; Grant, A.; Domercq, B.; Zhang, X.-H.; An, Z.; Zhang, X.; Barlow, S.; Kippelen, B.; Marder, S.R. Copolymers of perylene diimide with dithienothiophene and dithienopyrrole as electron-transport materials for all-polymer solar cells and field-effect transistors. J. Mater. Chem. 2009, 19, 5794-5803
44. Liao, X.-X.; Zhao, X.; Zhang, Z.-G.; Wang, H.-Q.; Zhan, X.; Li, Y.; Wang, J.; Zheng, J.-C. All-polymer solar cells based on side-chain-isolated polythiophenes and poly(perylene diimide-alt-dithienothiophene). Sol. Energ. Mat. Sol. C. 2013, 117, 336-342
45. Zhou, E.; Tajima, K.; Yang, C.; Hashimoto, K. Band gap and molecular energy level control of perylene diimide-based donor-acceptor copolymers for all-polymer solar cells. J. Mater. Chem. 2010, 20, 2362-2368
46. Zhou, E.; Cong, J.; Wei, Q.; Tajima, K.; Yang, C.; Hashimoto, K. All-Polymer Solar Cells from Perylene Diimide Based Copolymers: Material Design and Phase Separation Control. Angew. Chem. Int. Ed. 2011, 50, 2799-2803
47. Neuteboom, E.E.; Meskers, S.C.; van Hal, P.A.; van Duren, J.K.; Meijer, E.W.; Janssen, R.A.; Dupin, H.; Pourtois, G.; Cornil, J.; Lazzaroni, R.; Brédas, J.-L.; Beljonne, D. Alternating Oligo(p-phenylene vinylene)-Perylene Bisimide Copolymers: Synthesis, Photophysics, and Photovoltaic Properties of a New Class of Donor-Acceptor Materials. J. Am. Chem. Soc. 2003, 125, 8625-8638
48. Mikroyannidis, J.A.; Stylianakis, M.M.; Sharma, G.D.; Balraju, P.; Roy, M.S. A Novel Alternating Phenylenevinylene Copolymer with Perylene Bisimide Units: Synthesis, Photophysical, Electrochemical, and Photovoltaic Properties. J. Phys. Chem. C 2009, 113, 7904-7912
49. Liang, Z.; Cormier, R.A.; Nardes, A.M.; Gregg, B.A. Developing perylene diimide based acceptor polymers for organic photovoltaics. Synt. Met. 2011, 161, 1014-1021.
50. Alam, M.M.; Jenekhe, S.A. Efficient Solar Cells from Layered Nanostructures of Donor and Acceptor Conjugated Polymers. Chem. Mater. 2004, 16, 4647-4656
51. Fabiano, S.; Chen, Z.; Vahedi, S.; Facchetti, A.; Pignataro, B.; Loi, M.A. Role of photoactive layer morphology in high fill factor all-polymer bulk heterojunction solar cells. J. Mater. Chem. 2011, 21, 5891-5896
52. Moore, J.R.; Albert-Seifried, S.; Rao, A.; Massip, S.; Watts, B.; Morgan, D.J.; Friend, R.H.; McNeill, C.R.; Sirringhaus, H. Polymer Blend Solar Cells Based on a High-Mobility Naphthalenediimide-Based Polymer Acceptor: Device Physics, Photophysics and Morphology. Adv. Energy Mater. 2011, 1, 230-240
53. Schubert, M.; Dolfen, D.; Frisch, J.; Roland, S.; Steyrleuthner, R.; Stiller, B.; Chen, Z.; Scherf, U.; Koch, N.; Facchetti, A.; Neher, D. Influence of Aggregation on the Performance of All-Polymer Solar Cells Containing Low-Bandgap Naphthalenediimide Copolymers. Adv. Energy Mater. 2012, 2, 369-380
54. Hwang, Y.-J.; Ren, G.; Murari, N.M.; Jenekhe, S.A. n-Type Naphthalene Diimide-Biselenophene Copolymer for All-Polymer Bulk Heterojunction Solar Cells. Macromolecules 2012, 45, 9056-9062
55. Earmme, T.; Hwang, Y.-J.; Murari, N.M.; Subramaniyan, S.; Jenekhe, S.A. All-Polymer Solar Cells with 3.3% Efficiency Based on Naphthalene Diimide-Selenophene Copolymer Acceptor. J. Am. Chem. Soc. 2013, 135, 14960-14963
56. Yuan, M.; Durban, M.M.; Kazarinoff, P.D.; Zeigler, D.F.; Rice, A.H.; Segawa, Y.; Luscombe, C.K. Synthesis and characterization of fused-thiophene containing naphthalene diimide n-type copolymers for organic thin film transistor and all-polymer solar cell applications. J. Polym. Sci. A Polym. Chem. 2013, 51, 4061-4069
57. Chen, S.-C.; Zheng, Q.; Zhang, Q.; Cai, D.; Wang, J.; Yin, Z.; Tang, C. Tuning the frontier molecular orbital energy levels of n-type conjugated copolymers by using angular-shaped naphthalene tetracarboxylic diimides, and their use in all-polymer solar cells with high open-circuit voltages. J. Polym. Sci. A Polym. Chem. 2013, 51, 1999-2005
58. He, Y.; Gong, S.; Hattori, R.; Kanicki, J. High performance organic polymer light-emitting heterostructure devices. Appl. Phys. Lett. 1999, 74, 2265-2267
59. Arias, A.C.; MacKenzie, J.D.; Stevenson, R.; Halls, J.J.M.; Inbasekaran, M.; Woo, E.P.; Richards, D.; Friend, R.H. Photovoltaic Performance and Morphology of Polyfluorene Blends: A Combined Microscopic and Photovoltaic Investigation. Macromolecules 2001, 34, 6005-6013
60. Snaith, H.J.; Arias, A.C.; Morteani, A.C.; Silva, C.; Friend, R.H. Charge Generation Kinetics and Transport Mechanisms in Blended Polyfluorene Photovoltaic Devices. Nano Lett. 2002, 2, 1353-1357
61. Kim, Y.; Cook, S.; Choulis, S.A.; Nelson, J.; Durrant, J.R.; Bradley, D.D.C. Organic Photovoltaic Devices Based on Blends of Regioregular Poly(3-hexylthiophene) and Poly(9,9-dioctylfluorene-co-benzothiadiazole). Chem. Mater. 2004, 16, 4812-4818
62. McNeill, C.R.; Abrusci, A.; Zaumseil, J.; Wilson, R.; McKiernan, M.J.; Burroughes, J.H.; Halls, J.J.M.; Greenham, N.C.; Friend, R.H. Dual electron donor/electron acceptor character of a conjugated polymer in efficient photovoltaic diodes. Appl. Phys. Lett. 2007, 90, 193506:1-193506:3
63. McNeill, C.R.; Halls, J.J.M.; Wilson, R.; Whiting, G.L.; Berkebile, S.; Ramsey, M.G.; Friend, R.H.; Greenham, N.C. Efficient Polythiophene/Polyfluorene Copolymer Bulk Heterojunction Photovoltaic Devices: Device Physics and Annealing Effects. Adv. Funct. Mater. 2008, 18, 2309-2321
64. McNeill, C.R.; Abrusci, A.; Hwang, I.; Ruderer, M.A.; Müller-Buschbaum, P.; Greenham, N.C. Photophysics and Photocurrent Generation in Polythiophene/Polyfluorene Copolymer Blends. Adv. Funct. Mater. 2009, 19, 3103-3111
65. He, X.; Gao, F.; Tu, G.; Hasko, D.; Hüttner, S.; Steiner, U.; Greenham, N.C.; Friend, R.H.; Huck, W.T.S. Formation of Nanopatterned Polymer Blends in Photovoltaic Devices. Nano Lett. 2010, 10, 1302-1307
66. Mori, D.; Benten, H.; Kosaka, J.; Ohkita, H.; Ito, S.; Miyake, K. Polymer/Polymer Blend Solar Cells with 2.0% Efficiency Developed by Thermal Purification of Nanoscale-Phase-Separated Morphology. ACS Appl. Mater. Inter. 2011, 3, 2924-2927
67. Mori, D.; Benten, H.; Ohkita, H.; Ito, S.; Miyake, K. Polymer/Polymer Blend Solar Cells Improved by Using High-Molecular-Weight Fluorene-Based Copolymer as Electron Acceptor. ACS Appl. Mater. Inter. 2012, 4, 3325-3329
68. Moratti, S.C.; Cervini, R.; Holmes, A.B.; Baigent, D.R.; Friend, R.H.; Greenham, N.C.; Grüner, J.; Hamer, P.J. High electron affinity polymers for LEDs. Synt. Met. 1995, 71, 2117-2120
69. Greenham, N.C.; Moratti, S.C.; Bradley, D.D.C.; Friend, R.H.; Holmes, A.B. Efficient light-emitting diodes based on polymers with high electron affinities. Nature 1993, 365, 628-630
70. Halls, J.J.M.; Walsh, C.A.; Greenham, N.C.; Marseglia, E.A.; Friend, R.H.; Moratti, S.C.; Holmes, A.B. Efficient photodiodes from interpenetrating polymer networks. Nature 1995, 376, 498-500
71. Yu, G.; Heeger, A.J. Charge separation and photovoltaic conversion in polymer composites with internal donor/acceptor heterojunctions. J. Appl. Phys. 1995, 78, 4510-4515
72. Holcombe, T.W.; Woo, C.H.; Kavulak, D.F.J.; Thompson, B.C.; Fréchet, J.M.J. All-Polymer Photovoltaic Devices of Poly(3-(4-n-octyl)-phenylthiophene) from Grignard Metathesis (GRIM) Polymerization. J. Am. Chem. Soc. 2009, 131, 14160-14161
73. Cevik, E.; İlicali, D.; Egbe, D.A.M.; Günes, S. Bulk heterojunction and inverted type solar cells using a CN-PPV derivative. Sol. Energ. Mat. Sol. C. 2012, 98, 94-102
74. Egbe, D.A.M.; Kietzke, T.; Carbonnier, B.; Mühlbacher, D.; Hörhold, H.-H.; Neher, D.; Pakula, T. Synthesis, Characterization, and Photophysical, Electrochemical, Electroluminescent, and Photovoltaic Properties of Yne-Containing CN-PPVs. Macromolecules 2004, 37, 8863-8873
75. Breeze, A.J.; Schlesinger, Z.; Carter, S.A.; Tillmann, H.; Hörhold, H.H. Improving power efficiencies in polymer-polymer blend photovoltaics. Solar Sol. Energ. Mat. Sol. C. 2004, 83, 263-271
76. Kietzke, T.; Hörhold, H.-H.; Neher, D. Efficient Polymer Solar Cells Based on M3EH-PPV. Chem. Mater. 2005, 17, 6532-6537.
77. Yin, C.; Schubert, M.; Bange, S.; Stiller, B.; Castellani, M.; Neher, D.; Kumke, M.; Hörhold, H.-H. Tuning of the Excited-State Properties and Photovoltaic Performance in PPV-Based Polymer Blends. J. Phys. Chem. C 2008, 112, 14607-14617
78. Cho, N.S.; Hwang, D.-H.; Jung, B.-J.; Lim, E.; Lee, J.; Shim, H.-K. Synthesis, Characterization, and Electroluminescene of New Conjugated Polyfluorene Derivatives Containing Various Dyes as Comonomers. Macromolecules 2004, 37, 5265-5273
79. Koetse, M.M.; Sweelssen, J.; Hoekerd, K.T.; Schoo, H.F.M.; Veenstra, S.C.; Kroon, J.M.; Yang, X.; Loos, J. Efficient polymer:polymer bulk heterojunction solar cells. Appl. Phys. Lett. 2006, 88, 83504:1-83504:3
80. Sang, G.; Zou, Y.; Huang, Y.; Zhao, G.; Yang, Y.; Li, Y. All-polymer solar cells based on a blend of poly 3-(10-n-octyl-3-phenothiazine-vinylene)thiophene-co-2,5-thiophene and poly 1,4-dioctyloxyl-p-2,5-dicyanophenylenevinylene. Appl. Phys. Lett. 2009, 94, 193302:1-193302:3
81. Chochos, C.L.; Economopoulos, S.P.; Deimede, V.; Gregoriou, V.G.; Lloyd, M.T.; Malliaras, G.G.; Kallitsis, J.K. Synthesis of a Soluble n-Type Cyano Substituted Polythiophene Derivative: A Potential Electron Acceptor in Polymeric Solar Cells. J. Phys. Chem. C 2007, 111, 10732-10740
82. Vijayakumar, C.; Saeki, A.; Seki, S. Optoelectronic Properties of Dicyanofluorene-Based n-Type Polymers. Chem. Asian J. 2012, 7, 1845-1852
83. Cheng, Y.-J.; Yang, S.-H.; Hsu, C.-S. Synthesis of Conjugated Polymers for Organic Solar Cell Applications. Chem. Rev. 2009, 109, 5868-5923
84. Cao, Y.; Lei, T.; Yuan, J.; Wang, J.-Y.; Pei, J. Dithiazolyl-benzothiadiazole-containing polymer acceptors: synthesis, characterization, and all-polymer solar cells. Polym. Chem. 2013, 4, 5228-5236
85. Falzon, M.-F.; Zoombelt, A.P.; Wienk, M.M.; Janssen, R.A. Diketopyrrolopyrrole-based acceptor polymers for photovoltaic application. Phys. Chem. Chem. Phys. 2011, 13, 8931-8939
86. Eo, M.; Lee, S.; Park, M.H.; Lee, M.H.; Yoo, S.; Do, Y. Vinyl-Type Polynorbornenes with Pendant PCBM: A Novel Acceptor for Organic Solar Cells. Macromol. Rapid Commun. 2012, 33, 1119-1125
87. Eo, M.; Han, D.; Park, M.H.; Hong, M.; Do, Y.; Yoo, S.; Lee, M.H. Polynorbornenes with pendant PCBM as an acceptor for OPVs: Ring-opening metathesis versus vinyl-addition polymerization. Eur. Polym. J. 2014, 51, 37-44
88. Chochos, C.L.; Govaris, G.K.; Kakali, F.; Yiannoulis, P.; Kallitsis, J.K.; Gregoriou, V.G. Synthesis, optical and morphological characterization of soluble main chain 1,3,4-oxadiazole copolyarylethers-Potential candidates for solar cells applications as electron acceptors. Polymer 2005, 46, 4654-4663
89. Kymakis, E.; Koudoumas, E.; Franghiadakis, I. Bi-layer photovoltaic devices with PPQ as the electron acceptor layer. Sol. Energ. Mat. Sol. Cells 2006, 90, 1705-1714